S-8351CxxUA [SII]
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER;
| 型号： | S-8351CxxUA |
| 厂家： | 
SEIKO INSTRUMENTS INC |
| 描述： | STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER 开关 |
| 文件： | 总51页 (文件大小：2642K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
S-8351/8352 Series
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING
REGULATOR / SWITCHING REGULATOR CONTROLLER
www.sii-ic.com
© SII Semiconductor Corporation, 2002-2010
Rev.3.0_01
The S-8351/8352 Series is a CMOS step-up switching regulator controller which mainly consists of a reference voltage
source, an oscillation circuit, a comparator and PFM control circuit. The PFM control circuit allows the duty ratio to be
automatically switched according to the load (at light load : 50%, at high output current : 75%), enabling products with a low
ripple over a wide range, high efficiency, and high output current (A, B, and D type). Products with a fixed duty ratio of 75%
are also available (C type).
The S-8351 Series can configure a step-up switching regulator with an external coil, capacitor, and diode. A protection
circuit turns off the built-in MOS FET when the voltage at the CONT pin exceeds the limit to prevent it from being damaged.
In addition to the above features, the small package and low current consumption, makes the S-8351 Series ideal for
applications such as the power supply unit of portable equipment.
The S-8352 Series, which features an external transistor, is suitable for applications requiring a high output current.
Features
• Low voltage operation : Startup at 0.9 V min. (IOUT = 1 mA) guaranteed
• Low current consumption : During operation 23.2 μA (VOUT = 3.3 V, typ.)
During shutdown 0.5 μA (max.)
• Duty ratio : 50 % / 75 % built-in auto-switching-type PFM control circuit (A, B, and D type)
75 % built-in fixed-type PFM control circuit (C type)
• External parts : Coil, capacitor, and diode
• Output voltage : Selectable in 0.1 V steps between 2.0 V to 6.5 V (A, B, and C type)
Selectable in 0.1 V steps between 1.5 V to 6.5 V (D type)
• Output voltage accuracy : 2.4%
• Shutdown function (A type)
• VDD / VOUT separate type (D type)
• External transistor type available (S-8352 Series)
• Lead-free, Sn 100%, halogen-free*1
*1. Refer to “ Product Name Structure” for details.
Applications
• Power supplies for portable equipment such as digital cameras, electronic notebooks, and PDAs
• Power supplies for audio equipment such as portable CD / MD players
• Constant voltage power supplies for cameras, video equipment, and communications equipment
• Power supplies for microcomputers
Packages
• SOT-23-3
• SOT-23-5
• SOT-89-3
1
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
Block Diagrams
1. S-8351 Series
(1) A Type (With shutdown function)
CONT
VOUT
IC internal
power supply
Protection
circuit
VREF
PFM
control
circuit
+
−
VSS
ON/ OFF
Figure 1
(2) B and C Types (Without shutdown function, VDD / VOUT non-separate type)
CONT
VOUT
IC internal
power supply
Protection
circuit
VREF
PFM
control
circuit
+
−
VSS
Figure 2
(3) D Type (VDD / VOUT separate type)
CONT
VDD
VOUT
IC internal power supply
Protection
circuit
VREF
PFM
control
circuit
+
−
VSS
Figure 3
2
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
2. S-8352 Series
(1) A Type (With shutdown function)
VOUT
IC internal power supply
VREF
PFM
control
circuit
+
−
EXT
VSS
ON/ OFF
Figure 4
(2) B and C Type (Without Shutdown function, VDD / VOUT non-separate type)
VOUT
IC internal power supply
VREF
PFM
control
circuit
+
−
EXT
VSS
Figure 5
(3) D Type (VDD / VOUT separate type)
VDD
VOUT
IC internal
power supply
VREF
PFM
control
circuit
+
−
EXT
VSS
Figure 6
3
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
Product Name Structure
The product types, output voltage, and packages for the S-8351/8352 Series can be selected at the user’s request.
Please refer to the “3. Product Name” for the definition of the product name, “4. Package” regarding the package
drawings and “5. Product Name List” for the full product names.
1. Function List
(1) Built-in Power MOS FET Type
Table 1
Duty
ratio
[%]
Switching
frequency
[kHz]
VDD / VOUT
separate
type
Controll
system
Shutdown
function
Product Name
Package
Application
Applications requiring shutdown
function
Applications not requiring
shutdown function
Applications not requiring
shutdown function
Applications not requiring
shutdown function
S-8351AxxMC
S-8351BxxMA
S-8351CxxMA
S-8351CxxUA
PFM
PFM
PFM
PFM
50 / 75
50 / 75
75
100
100
100
100
Yes
−
−
−
−
−
SOT-23-5
SOT-23-3
SOT-23-3
SOT-89-3
−
75
−
Applications in which output
voltage is adjusted by external
resistor
S-8351DxxMC
PFM
50 / 75
100
−
Yes
SOT-23-5
(2) External Power MOS FET Type
Table 2
Duty
Ratio
[%]
Switching
Frequency
[kHz]
V
DD / VOUT
Separate
Type
Controll
System
Shutdown
Function
Product Name
Package
Application
Applications requiring shutdown
function
Applications not requiring
shutdown function
Applications not requiring
shutdown function
Applications not requiring
shutdown function
S-8352AxxMC
S-8352BxxMA
S-8352CxxMA
S-8352CxxUA
PFM
PFM
PFM
PFM
50 / 75
50 / 75
75
100
100
100
100
Yes
−
−
−
−
−
SOT-23-5
SOT-23-3
SOT-23-3
SOT-89-3
−
75
−
Applications in which output
voltage is adjusted by external
resistor
S-8352DxxMC
PFM
50 / 75
100
−
Yes
SOT-23-5
4
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
2. Package and Function List by Product Type
Table 3
Package Name Shutdown Function VDD / VOUT Separate Type
Series Name
Type
(Abbreviation)
MC
Yes / No
Yes
Yes / No
No
A (Duty ratio 50% / 75% auto-switching type)
A = 100 kHz
B (Duty ratio 50% / 75% auto-switching type)
B = 100 kHz
C (Duty ratio 75% fixed type)
C = 100 kHz
D (Duty ratio 50% / 75% auto-switching type)
D = 100 kHz
MA
MA / UA
MC
No
No
No
No
No
S-8351 Series,
S-8352 Series
Yes
3. Product Name
(1) SOT-23-3
S-835 x
x
xx MA - xxx T2
G
Environmental code
G : Lead-free (for details, please contact our sales office)
IC direction in tape specifications *1
Product name (abbreviation) *2
Package name (abbreviation)
MA : SOT-23-3
Output voltage
15 to 65
(e.g. When the output voltage is 1.5 V, it is expressed as 15.)
Product type
A : With shutdown function,
fOSC = 100 kHz
B : 50% / 75% automatic duty ratio switching type, fOSC = 100 kHz
C : 75% duty ratio fixed type,
D : VDD / VOUT separate type,
f
OSC = 100 kHz
fOSC = 100 kHz
Series name
1 : Built-in power MOS FET
2 : External power MOS FET
*1. Refer to the tape specifications.
*2. Refer to the Table 4, 5 in the “5. Product Name List”.
5
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
(2) SOT-23-5, SOT-89-3
S-835 x
x
xx xx - xxx T2
x
Environmental code
U : Lead-free (Sn 100%), halogen-free
G : Lead-free (for details, please contact our sales office)
IC direction in tape specifications *1
Product name (abbreviation) *2
Package name (abbreviation)
MC : SOT-23-5
UA : SOT-89-3
Output voltage
15 to 65
(e.g. When the output voltage is 1.5 V, it is expressed as 15.)
Product type
A : With shutdown function,
fOSC = 100 kHz
B : 50% / 75% automatic duty ratio switching type, fOSC = 100 kHz
C : 75% duty ratio fixed type,
D : VDD / VOUT separate type,
fOSC = 100 kHz
fOSC = 100 kHz
Series name
1 : Built-in power MOS FET
2 : External power MOS FET
*1. Refer to the tape specifications.
*2. Refer to the Table 4, 5 in the “5. Product Name List”.
4. Package
Drawing Code
Tape
Package Name
SOT-23-3
Package
Reel
MP003-A-P-SD
MP005-A-P-SD
UP003-A-P-SD
MP003-A-C-SD
MP005-A-C-SD
UP003-A-C-SD
MP003-A-R-SD
MP005-A-R-SD
UP003-A-R-SD
SOT-23-5
SOT-89-3
6
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
5. Product Name List
(1) S-8351 Series
Table 4
S-8351CxxMA
Output
voltage
S-8351AxxMC
Series
S-8351BxxMA
Series
S-8351CxxUA
S-8351DxxMC
Series
Series
Series
1.5 V
2.0 V
2.2 V
2.5 V
2.6 V
2.7 V
2.8 V
3.0 V
3.1 V
3.2 V
3.3 V
3.5 V
4.0 V
4.5 V
4.6 V
4.7 V
5.0 V
5.5 V
5.6 V
6.0 V
−
−
−
−
−
−
−
−
−
−
−
−
−
S-8351D15MC-J8AT2x
S-8351A20MC-J2FT2x
S-8351A22MC-J2HT2x
S-8351A25MC-J2KT2x
S-8351A26MC-J2LT2x
S-8351A27MC-J2MT2x
S-8351A28MC-J2NT2x
S-8351A30MC-J2PT2x
−
S-8351A32MC-J2RT2x
S-8351A33MC-J2ST2x
S-8351A35MC-J2UT2x
S-8351A40MC-J2ZT2x
S-8351A45MC-J3ET2x
−
S-8351B20MA-J4FT2G
S-8351D20MC-J8FT2x
−
−
−
−
−
S-8351B25MA-J4KT2G
S-8351C25UA-J6KT2x
−
−
−
−
S-8351B27MA-J4MT2G
−
−
S-8351B30MA-J4PT2G
S-8351C30UA-J6PT2x
S-8351D30MC-J8PT2x
−
−
−
−
S-8351C31UA-J6QT2x
−
−
−
−
S-8351C32UA-J6RT2x
S-8351B33MA-J4ST2G
S-8351C33MA-J6ST2G
S-8351C33UA-J6ST2x
−
−
−
−
−
−
−
−
−
−
−
S-8351C35UA-J6UT2x
−
−
−
−
S-8351D40MC-J8ZT2x
S-8351B45MA-J5ET2G
−
−
−
S-8351B46MA-J5FT2G
S-8351A47MC-J3GT2x
S-8351A50MC-J3JT2x
S-8351A55MC-J3OT2x
S-8351A56MC-J3PT2x
S-8351A60MC-J3TT2x
−
S-8351B50MA-J5JT2G
S-8351C50UA-J7JT2x
S-8351D50MC-J9JT2x
S-8351B55MA-J5OT2G
−
−
−
−
−
−
−
S-8351D60MC-J9TT2x
(2) S-8352 Series
Table 5
Output
voltage
S-8352AxxMC
Series
S-8352BxxMA
S-8352CxxUA
S-8352DxxMC
Series
Series
Series
2.0 V
2.5 V
3.0 V
3.1 V
3.2 V
3.3 V
3.5 V
3.7 V
4.0 V
4.6 V
4.7 V
5.0 V
5.4 V
5.6 V
−
−
−
−
−
S-8352D20MC-K8FT2x
S-8352A25MC-K2KT2x
S-8352A30MC-K2PT2x
−
−
S-8352B30MA-K4PT2G
S-8352C30UA-K6PT2x
S-8352D30MC-K8PT2x
−
−
−
−
−
−
−
−
S-8352C31UA-K6QT2x
−
−
S-8352A32MC-K2RT2x
S-8352A33MC-K2ST2x
S-8352A35MC-K2UT2x
S-8352A37MC-K2WT2x
S-8352A40MC-K2ZT2x
S-8352A46MC-K3FT2x
S-8352A47MC-K3GT2x
S-8352A50MC-K3JT2x
S-8352A54MC-K3NT2x
−
S-8352C32UA-K6RT2x
S-8352C33UA-K6ST2x
S-8352D33MC-K8ST2x
−
−
−
−
−
−
−
−
−
−
−
−
−
S-8352B50MA-K5JT2G
S-8352C50UA-K7JT2x
−
−
−
S-8352C56UA-K7PT2x
Remark 1. Please contact the SII Semiconductor Corporation marketing department for products with an output voltage other
than those specified above.
2. x: G or U
3. Please select products of environmental code = U for Sn 100%, halogen-free products.
7
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
Pin Configurations
SOT-23-3
Top view
Table 6 S-8351 Series B and C Types
(Without shutdown function, VDD / VOUT non-separate type)
1
Pin No.
Symbol
VOUT
VSS
Pin Description
Output voltage pin and IC power supply pin
GND pin
1
2
3
CONT
External inductor connection pin (Open-drain output)
Table 7 S-8352 Series B and C Types
(Without shutdown function, VDD / VOUT non-separate type)
2
3
Pin No.
Symbol
VOUT
VSS
Pin Description
Output voltage pin and IC power supply pin
GND pin
Figure 7
1
2
3
External transistor connection pin (CMOS output)
EXT
Table 8 S-8351 Series A Type
(With shutdown function, VDD / VOUT non-separate type)
SOT-23-5
Top view
5
4
Pin No.
1
Symbol
Pin Description
Shutdown pin
“H”: Normal operation (Step-up operating)
“L”: Step-up stopped (Entire circuit stopped)
Output voltage pin and IC power supply pin
No connection
ON/ OFF
2
3
4
5
VOUT
NC*1
VSS
GND pin
1
2
3
CONT
External inductor connection pin (Open-drain output)
*1. The NC pin indicates electrically open.
Figure 8
Table 9 S-8352 Series A Type
(With shutdown function, VDD / VOUT non-separate type)
Pin No.
1
Symbol
Pin Description
Shutdown pin
“H”: Normal operation (Step-up operating)
“L”: Step-up stopped (Entire circuit stopped)
Output voltage pin and IC power supply pin
No connection
ON/ OFF
2
3
4
5
VOUT
NC*1
VSS
EXT
GND pin
External transistor connection pin (CMOS output)
*1. The NC pin indicates electrically open.
8
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
Table 10 S-8351 Series D Type
(Without shutdown function, VDD / VOUT separate type)
Pin No.
Symbol
VOUT
VDD
Pin Description
Output voltage pin
1
2
3
4
5
IC power supply pin
NC*1
No connection
VSS
GND pin
CONT
External inductor connection pin (Open-drain output)
*1. The NC pin indicates electrically open.
Table 11 S-8352 Series D Type
(Without shutdown function, VDD / VOUT separate type)
Pin No.
Symbol
VOUT
VDD
Pin Description
Output voltage pin
1
2
3
4
5
IC power supply pin
NC*1
No connection
VSS
GND pin
EXT
External transistor connection pin (CMOS output)
*1. The NC pin indicates electrically open.
SOT-89-3
Top view
Table 12 S-8351 Series C Type
(Without shutdown function, VDD / VOUT non-separate type)
Pin No.
Symbol
VSS
Pin Description
1
2
3
GND pin
VOUT
CONT
Output voltage pin and IC power supply pin
External inductor connection pin (Open-drain output)
1
2
3
Figure 9
Table 13 S-8352 Series C Type
(Without shutdown function, VDD / VOUT non-separate type)
Pin No.
Symbol
VSS
Pin Description
1
2
3
GND pin
VOUT
EXT
Output voltage pin and IC power supply pin
External transistor connection pin (CMOS output)
9
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
Absolute Maximum Ratings
Table 14
(Ta = 25°C unless otherwise specified)
Item
Symbol
VOUT
Absolute maximum rating
Unit
V
VOUT pin voltage
VSS − 0.3 to VSS + 12
VSS − 0.3 to VSS + 12
ON/ OFF pin voltage *1
VON/OFF
V
VDD pin voltage *2
VDD
VSS − 0.3 to VSS + 12
V
CONT pin voltage
VCONT
VSS − 0.3 to VSS + 12
V
D type
EXT pin voltage
Others
VSS − 0.3 to VDD + 0.3
VSS − 0.3 to VOUT + 0.3
V
VEXT
V
CONT pin current
EXT pin current
ICONT
IEXT
300
mA
mA
mW
mW
mW
mW
mW
mW
°C
50
150 (When not mounted on board)
SOT-23-3
430*3
250 (When not mounted on board)
600*3
Power dissipation
SOT-23-5
SOT-89-3
PD
500 (When not mounted on board)
1000*3
Operating ambient temperature
Storage temperature
Topr
Tstg
− 40 to + 85
− 40 to + 125
°C
*1. With shutdown function
*2. For VDD / VOUT separate type
*3. When mounted on board
[Mounted board]
(1) Board size :
(2) Board name :
114.3 mm × 76.2 mm × t1.6 mm
JEDEC STANDARD51-7
Caution The absolute maximum ratings are rated values exceeding which the product could suffer physical
damage. These values must therefore not be exceeded under any conditions.
(1) When mounted on board
(2) When not mounted on board
1200
600
1000
800
500
SOT-89-3
SOT-89-3
400
300
200
100
0
SOT-23-5
SOT-23-3
SOT-23-5
SOT-23-3
600
400
200
0
0
50
100
150
0
50
100
150
Ambient temperature (Ta) [°C]
Ambient temperature (Ta) [°C]
Figure 10 Power Dissipation of Packages
10
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
Electrical Characteristics
(1) S-8351 Series
Table 15 (1 / 2)
(Ta = 25°C unless otherwise specified)
Measurement
Item
Output voltage
Symbol
VOUT
Condition
Min.
Typ.
Max.
Unit
circuit
VOUT(S) VOUT(S) VOUT(S)
0.976
−
−
−
−
V
1
×
×
1.024
10
Input voltage
Operation start voltage
VIN
VST1
−
−
V
V
1
1
IOUT = 1 mA
0.9
No external parts, Voltage applied to VOUT
,
Oscillation start voltage
VST2
CONT pin pulled up to VOUT with 300
resistor
Ω
−
−
0.8
V
2
S-8351x15 to 29
S-8351x30 to 49
S-8351x50 to 65
S-8351x15 to 19
S-8351x20 to 29
S-8351x30 to 39
S-8351x40 to 49
S-8351x50 to 59
S-8351x60 to 65
S-8351x15 to 19
S-8351x20 to 29
S-8351x30 to 39
S-8351x40 to 49
S-8351x50 to 59
S-8351x60 to 65
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
8.5
9.0
9.5
−
−
−
μ
μA
μA
μA
A
1
1
1
2
2
2
2
2
2
2
2
2
2
2
2
Input current during no- load
IIN
IOUT = 0 mA
9.6
16.0
26.2
38.6
53.3
70.2
91.5
3.5
3.8
4.1
4.4
4.7
5.1
15.7
23.2
32.0
42.1
54.9
2.3
2.5
2.7
2.9
3.1
μA
μ
A
Current consumption 1
Current consumption 2
ISS1
VOUT = VOUT(S)
×
+
0.95
μ
A
μ
A
μ
A
μ
A
μA
μA
μA
μA
ISS2
VOUT = VOUT(S)
0.5 V
3.3
μA
Current consumption during
shutdown
(With shutdown function)
VON/OFF = 0 V
ISSS
−
−
0.5
μA
2
S-8351x15 to 19
S-8351x20 to 24
S-8351x25 to 29
S-8351x30 to 39
S-8351x40 to 49 110.9 201.6
S-8351x50 to 59 125.7 228.6
S-8351x60 to 65 135.2 245.8
50.2
65.0
78.5
90.7
91.2
118.2
142.7
164.8
−
−
−
−
−
−
−
mA
mA
mA
mA
mA
mA
mA
2
2
2
2
2
2
2
Switching current
ISW
VCONT = 0.4 V
No external parts, VCONT = VOUT = 10 V,
ON/OFF = 0 V
Apply to CONT pin, Confirm oscillation stop
VIN = VOUT(S) 0.4 to 0.6
IOUT = 10 A to VOUT(S) / 250
Switching transistor leakage
current
ISWQ
−
−
0.5
μ
A
2
V
CONT pin limit voltage
Line regulation
Load regulation
VCONTLMT
−
−
−
0.9
30
30
−
60
60
V
mV
mV
2
1
1
Δ
Δ
VOUT1
VOUT2
∆VOUT
×
×
μ
× 1.25
Output voltage temperature
coefficient
Ta =
−
40°C to
+
85°C
−
90
70
−
50
100
75
−
110
80
−
ppm /
°C
1
2
2
1
∆Ta • VOUT
V
OUT = VOUT(S)
Measured waveform at CONT pin
OUT = VOUT(S) 0.95,
×
0.95,
Oscillation frequency
Duty ratio 1
fOSC
kHz
%
V
×
Duty1
Duty2
Measured waveform at CONT pin
Duty ratio 2
(For A, B, D type)
Measured waveform at CONT pin at light load
50
%
11
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
Table 15 (2 / 2)
(Ta = 25°C unless otherwise specified)
Measurement
Item
Symbol
VSH
VSL1
Condition
Min.
Typ.
Max.
Unit
circuit
V
OUT = VOUT(S)
Measured oscillation at CONT pin
OUT = VOUT(S) 0.95,
× 0.95,
0.75
−
−
V
2
ON/OFF pin input voltage
(With shutdown function)
V
×
At VOUT
≥
1.5 V
−
−
−
−
−
−
0.3
0.2
0.1
0.1
V
V
2
2
2
2
Judged oscillation stop at
CONT pin
VSL2
ISH
At VOUT
<
1.5 V
VON/OFF = 10 V
−
−
0.1
0.1
μA
ON/OFF pin input current
(With shutdown function)
VON/OFF = 0 V
ISL
μA
S-8351x30
S-8351x50
−
−
86
88
−
−
%
%
1
1
Efficiency
EFFI
−
External parts
Coil:
Diode:
CDRH6D28-101 (100 μH) of Sumida Corporation
MA2Z748 (Shottky type) of Matsushita Electric Industrial Co., Ltd.
Capacitor: F93 (16 V, 47 μF tantalum type) of Nichicon Corporation
VIN = VOUT(S) × 0.6 applied, IOUT = VOUT(S) / 250 Ω
With shutdown function :
ON/OFF pin is connected to VOUT
For VDD / VOUT separate type : VDD pin is connected to VOUT pin
Remark 1.
VOUT(S) specified above is the set output voltage value, and VOUT is the typical value of the actual output
voltage.
2. VDD / VOUT separate type
A step-up operation is performed from VDD = 0.8 V. However, 1.8 V≤VDD<10 V is recommended stabilizing
the output voltage and oscillation frequency. (VDD≥1.8 V must be applied for products with a set value of less
than 1.9 V.)
12
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
(2) S-8352 Series
Table 16 (1 / 2)
(Ta = 25°C unless otherwise specified)
Measurement
Item
Symbol
VOUT
Condition
Min.
Typ.
Max.
Unit
circuit
VOUT(S) VOUT(S) VOUT(S)
0.976
Output voltage
−
−
V
3
×
×
1.024
10
Input voltage
VIN
VST1
VST2
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
V
V
V
μA
μA
μA
μA
3
3
4
4
4
4
4
4
4
4
4
4
4
4
4
Operation start voltage
Oscillation start voltage
IOUT = 1 mA
0.9
0.8
No external parts, Voltage applied to VOUT
S-8352x15 to 19
7.4
12.0
17.8
24.7
32.7
43.0
2.3
2.5
2.7
2.9
3.1
3.3
12.3
20.0
29.6
41.1
54.5
71.6
3.5
3.8
4.1
4.4
4.7
S-8352x20 to 29
S-8352x30 to 39
Current consumption 1
Current consumption 2
ISS1
VOUT = VOUT(S)
×
0.95
S-8352x40 to 49
S-8352x50 to 59
S-8352x60 to 65
S-8352x15 to 19
S-8352x20 to 29
S-8352x30 to 39
S-8352x40 to 49
S-8352x50 to 59
S-8352x60 to 65
μ
A
μ
A
μ
A
μA
μA
μA
μA
ISS2
VOUT = VOUT(S)
+
0.5 V
5.1
μA
Current consumption during
shutdown
(With shutdown function)
VON/OFF = 0 V
ISSS
−
−
0.5
μA
4
S-8352x15 to 19
S-8352x20 to 24
S-8352x25 to 29
S-8352x30 to 39
S-8352x40 to 49
S-8352x50 to 59
S-8352x60 to 65
S-8352x15 to 19
S-8352x20 to 24
S-8352x25 to 29
S-8352x30 to 39
S-8352x40 to 49
S-8352x50 to 59
S-8352x60 to 65
−
−
−
−
3.5
5.2
6.8
8.2
−
−
6.3
9.4
−
−
−
−
−
−
−
−
−
−
−
−
−
−
60
60
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mV
mV
4
4
4
4
4
4
4
4
4
4
4
4
4
4
3
3
−
−
−
−
−
12.3
14.9
19.4
22.8
25.2
6.9
IEXTH
VEXT = VOUT − 0.4 V
−
−
−
10.7
12.5
13.9
3.8
EXT pin output current
5.6
7.3
8.9
11.6
13.7
15.3
−
10.2
13.3
16.2
21.1
25.0
27.8
30
IEXTL
VEXT
=
−
0.4 V
Line regulation
Load regulation
Δ
Δ
VOUT1
VOUT2
∆VOUT
VIN = VOUT(S)
×
0.4 to
×
0.6
IOUT = 10 A to VOUT(S) / 100
μ
×
1.25
−
30
Output voltage temperature
coefficient
Ta =
−
40°C to
+
85
°
C
−
90
70
−
50
100
75
−
110
80
−
ppm /
°
C
3
4
4
3
∆Ta • VOUT
V
OUT = VOUT(S)
Measured waveform at EXT pin
OUT = VOUT(S) 0.95,
×
0.95,
Oscillation frequency
Duty ratio 1
fOSC
kHz
%
V
×
Duty1
Duty2
Measured waveform at EXT
Duty ratio 2
(For A, B, D type)
Measured waveform at EXT pin at light load
50
%
13
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
Table 16 (2 / 2)
(Ta = 25°C unless otherwise specified)
Measurement
Item
Symbol
VSH
Condition
Min.
Typ.
Max.
Unit
circuit
V
OUT = VOUT(S)
Measured oscillation at EXT
OUT = VOUT(S) 0.95,
× 0.95,
0.75
−
−
V
4
ON/OFF pin input voltage
(With shutdown function)
V
×
VSL1
VSL2
ISH
At VOUT
≥
1.5 V
−
−
−
−
−
−
0.3
0.2
0.1
0.1
V
V
4
4
4
4
Judged oscillation stop at
EXT pin
At VOUT
<
1.5 V
VON/OFF = 10 V
−
−
0.1
0.1
μA
ON/OFF pin input current
(With shutdown function)
VON/OFF = 0 V
ISL
μA
S-8352x30
S-8352x50
−
−
83
85
−
−
%
%
3
3
Efficiency
EFFI
−
External parts
Coil:
CDRH6D28-101 (100 μH) from Sumida Corporation
Diode:
Capacitor:
Transistor:
Base resistor (Rb):
Base capacitor (Cb):
MA2Z748 (Shottky type) from Matsushita Electric Industrial Co., Ltd.
F93 (16 V, 47 μF tantalum type) from Nichicon Corporation
CPH3210 from Sanyo Electric Co., Ltd.
1 kΩ
2200 pH (ceramic type)
VIN = VOUT(S) × 0.6 applied, IOUT = VOUT(S) / 100 Ω
With shutdown function :
ON/OFF pin is connected to VOUT
For VDD / VOUT separate type : VDD pin is connected to VOUT pin
Remark 1.
VOUT(S) specified above is the set output voltage value, and VOUT is the typical value of the actual output
voltage.
2. VDD / VOUT separate type
A step-up operation is performed from VDD = 0.8 V. However, 1.8 V≤VDD<10 V is recommended stabilizing
the output voltage and oscillation frequency. (VDD≥1.8 V must be applied for products with a set value of less
than 1.9 V.)
14
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
Measurement Circuits
1.
+
−
+
−
CONT
VSS
VOUT
VDD*1
ON/OFF *2
V
Figure 11
300 Ω
2.
CONT
VOUT
VDD*1
ON/OFF *2
VSS
A
+
−
Figure 12
3.
CD
+
−
Rb
EXT
+
−
V
VOUT
VDD*1
ON/OFF *2
VSS
Figure 13
4.
EXT
ON/OFF *2
A
VOUT
VDD*1
+
−
VSS
Figure 14
*1. For VDD / VOUT separate type
*2. With shutdown function
15
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
Operation
1. Step-up DC-DC Converter
The S-8351/8352 Series is a DC-DC converter that uses a pulse frequency modulation method (PFM) and features
low current consumption. This series is an especially efficient DC-DC converter at an output current of 100 μA or
lower.
In conventional fixed-duty PFM DC-DC converters, although a low duty ratio allows a lower ripple voltage when the
current load is light, the efficiency is decreased when the output load current is large. Conversely, a high duty ratio
increases the output load current and efficiency, but increases the ripple voltage when the output load current is low.
In the A, B, and D types, the duty ratio is automatically switched 75% when the output load current is high to secure
the load drive capability and 50% when the output load current is low to control the load drive capability to decrease
pulse skipping. This suppresses a drop in the ripple frequency, enabling control of the increase in the ripple voltage.
The C type adopts a 75% fixed-duty PFM method. The ripple voltage increases more than that of the duty switching
type with the load is low, but the efficiency is better.
In the A, B, and D types, the duty ratio is not rapidly changed, but rather smoothly switched in the intermediate area
between 50% and 75%. Therefore, fluctuation of the ripple voltage caused by duty switching is minimized. Figures
15, 16 show the ripple voltage characteristics versus the output current.
S-8351A30MC
S-8351A50MC
Ta = 25°C
Ta = 25°C
140
120
100
80
100
90
80
70
60
50
40
30
20
10
0
60
40
VIN = 1.5 V
VIN = 2 V
20
VIN = 2 V
VIN = 3 V
0
0
20
40
IOUT [mA]
60
80
100
0
20 40 60 80 100 120140 160 180
OUT [mA]
I
Figure 15 Output Current (IOUT) vs. Ripple Voltage (Vrp-p
)
Figure 16 Output Current (IOUT) vs. Ripple Voltage (Vrp-p
)
Characteristics
Characteristics
These figures show that the ripple voltage decreases as the output load current (IOUT) changes from large to small.
The ripple voltage becomes particularly small when IOUT is in the coil current discontinuous region of 20 mA or less.
16
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
2. ON/OFF Pin (Shutdown Pin) (A Type)
ON/OFF pin stops or starts step-up operation.
Setting the ON/OFF pin to the “L” level stops operation of all the internal circuits and reduces the current
consumption significantly.
DO NOT use the ON/OFF pin in a floating state because it has the structure shown in Figure 17 and is not pulled
up or pulled down internally. DO NOT apply a voltage of between 0.3 V and 0.75 V to the ON/OFF pin because
applying such a voltage increases the current consumption. If the shutdown pin is not used, connect it to the VOUT
pin.
The ON/OFF pin does not have hysteresis.
Table 17
CR oscillation circuit
Output voltage
Fixed
ON/OFF pin
“H”
“L”
Operation
Stop
*1
≅VIN
*1. Voltage obtained by subtracting the voltage drop due to the DC resistance of the inductor and the diode forward
voltage from VIN.
VOUT
ON/ OFF
VSS
Figure 17 ON/OFF Pin Structure
17
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
3. Operation
The following are the basic equations [(1) through (7)] of the step-up switching regulator. (Refer to Figure 18.)
L
Di
VIN
+
−
CL
ON/ OFF
CONT
M1
VOUT
+
−
OSC
Figure 18 Step-Up Switching Regulator Circuit for Basic Equation
Voltage at CONT pin at the moment M1 is turned ON (VA) *1
:
*2
VA = VS
(1)
*1. Current flowing through L (IL) is zero.
*2. Non-saturated voltage of M1.
The change in IL over time :
dIL
VL
VIN − VS
=
=
(2)
(3)
dt
L
L
Integration of equation (2) (IL) :
VIN − VS
I =
• t
L
L
IL flows while M1 is ON (tON). The time of tON is determined by the oscillation frequency of OSC.
The peak current (IPK) after tON
:
V
IN − VS
L
IPK
=
• t
(4)
ON
The energy stored in L is represented by 1/2 • L (IPK)2.
When M1 is turned OFF (tOFF), the energy stored in L is emitted through a diode to the output capacitor.
Then, the reverse voltage (VL) is generated :
VL = (VOUT + VD*1) − VIN
(5)
(6)
*1. Diode forward voltage
The voltage at CONT pin rises only by VOUT+VD.
The change in the current (IL) flowing through the diode into VOUT during tOFF
:
dIL VL VOUT + VD − V
IN
=
=
dt
L
L
18
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
Integration of the equation (6) is as follows :
V
+ VD − V
L
IN
OUT
IL = IPK
−
• t
(7)
During tON, the energy is stored in L and is not transmitted to VOUT
.
When receiving the output current (IOUT) from
VOUT, the energy of the capacitor (CL) is consumed. As a result, the pin voltage of CL is reduced, and goes to the
lowest level after M1 is turned ON (tON). When M1 is turned OFF, the energy stored in L is transmitted through the
diode to CL, and the voltage of CL rises rapidly. VOUT is a time function, and therefore indicates the maximum value
(ripple voltage (VP P) ) when the current flowing through into VOUT and load current (IOUT) match.
−
Next, the ripple voltage is determined as follows.
IOUT vs. t1 (time) from when M1 is turned OFF (after tON) to when VOUT reaches the maximum level :
V
+ VD − V
L
IN
OUT
IOUT = IPK
−
• t
(8)
(9)
1
L
∴t1 = (IPK −IOUT )•
VOUT + VD − V
IN
When M1 is turned OFF (tOFF), IL = 0 (when the energy of the inductor is completely transmitted). Based on equation (7) :
L
tOFF
=
(10)
(11)
VOUT + VD − V
IPK
IN
When substituting equation (10) for equation (9) :
I
OUT
• tOFF
t1 = tOFF
−
IPK
Electric charge ΔQ1 which is charged in CL during t1 :
t1ILdt = IPK
dt −
t1tdt = IPK • t1 −
•
t1
(12)
(13)
(14)
t1
VOUT + VD − V
VOUT + VD − V
IN
1
2
2
IN
ΔQ = 0
• 0
• 0
1
L
L
When substituting equation (12) for equation (9) :
1
IPK +IOUT
ΔQ1= IPK
−
(
IPK −IOUT
)
• t1 =
• t1
2
2
A rise in voltage (VP P) due to ΔQ 1 :
−
∆Q1
1
I
+IOUT
2
PK
VP−P
=
=
•
• t
1
CL
CL
When taking into consideration IOUT to be consumed during t1 and the Equivalent Series Resistance (RESR) of CL :
ΔQ1
CL
1
I
+IOUT
2
I
+IOUT
2
IOUT • t1
CL
PK
PK
VP−P
=
=
•
• t1+
•R
−
(15)
(16)
ESR
CL
When substituting equation (11) for equation (15) :
2
(IPK −IOUT
)
tOFF
CL
I
+IOUT
PK
VP−P
=
•
+
•R
ESR
2IPK
2
Therefore to reduce the ripple voltage, it is important that the capacitor connected to the output pin has a large
capacity and a small RESR
.
19
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
External Parts Selection
1. Inductor
To minimize the loss due to inductor direct current resistance, select an inductor with the smallest possible direct
current resistance (less than 1 Ω). Set the inductance value (L value) to around 22 μH to 1 mH.
To make the average value of the output voltage (VOUT) constant, it is necessary to supply the energy corresponding
to the output current (IOUT) from the inductor. The amount of charge required for IOUT is IOUT × (tON + tOFF). Because
the inductor can supply energy only during tOFF, the charge is obtained by integrating equation (7) in the “3.
IPK
Operation” in the “ Operation” with 0 → tOFF, namely,
• tOFF
. Thus,
2
IPK
• tOFF = IOUT ×(tON + tOFF
)
(17)
(18)
2
tON + tOFF
∴IPK = 2•
•IOUT
tOFF
When the oscillation duty ratio of OSC is 75%, IPK = 8 • IOUT
.
Therefore, an IPK current which is eight times IOUT flows
into transistor (M1).
The S-8351 Series includes a switching current controller which monitors the current flowing into the CONT pin by
the voltage (CONT control voltage) and controls the current. This controller prevents destruction of the IC due to
excess current.
If an inductor with a large L value is selected, both IPK and IOUT decrease. Since the energy stored in the inductor is
1
equal to
L • (IPK )2 , the energy decreases because IPK decreases in steps of squares offsetting the increase of L
2
value. As a result, stepping up at a low voltage becomes difficult and the minimum operating input voltage becomes
high. However, the direct current resistance loss of L value and the M1 transistor decreases by the amount IPK
decreased, and the inductance efficiency improves.
On the other hand, if an inductor with a smaller L value is selected, both IPK and IOUT increase. Accordingly, the
minimum operating input voltage becomes low but the inductance efficiency deteriorates.
Caution An excessively large IPK may cause magnetic saturation for some core materials, leading to the
destruction of the IC. Use a core with material that satisfies Isat *1 > IPK
*1. Level of current that causes magnetic saturation.
2. Diode
Use an external diode that meets the following requirements :
• Low forward voltage : VF < 0.3 V
• High switching speed : 500 ns max.
• Reverse voltage :
• Current rate :
VOUT + VF or more
IPK or more
20
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
3. Capacitor (CIN, CL)
A capacitor on the input side (CIN) improves the efficiency by reducing the power impedance and stabilizing the input
current. Select a CIN value according to the impedance of the power supply used.
A capacitor on the output side (CL) is used for smoothing the output voltage. For step-up types, the output voltage
flows intermittently to the load current, so step-up types need a larger capacitance than step-down types. Therefore,
select an appropriate capacitor in accordance with the ripple voltage, which increases in case of a higher output
voltage or a higher load current. The capacitor value should be 10 μF or more.
A capacitor at the output side (CL) is used for smoothing the ripple voltage. Select an appropriate capacitor with a
small equivalent series resistance (RESR) and a large capacitance. The capacitor value should be 10 μF or mpre.
A
tantalum electrolytic capacitor and an organic semiconductor capacitor are especially recommended because of their
superior low-temperature and leakage current characteristics.
4. External Transistor (S-8352 Series)
For the S-8352 Series, connecting an external transistor increases the output current. An enhancement (N-channel)
MOS FET type or a bipolar (NPN) type can be used as the external transistor.
4. 1 Enhancement (N-channel) MOS FET Type
Figure 19 is a circuit example using a MOS FET transistor (N-channel).
VOUT
+
−
EXT
+
ON/ OFF *1
−
VOUT
VSS
*1. For A type.
Figure 19 Circuit Example Using MOS FET (N-channel) Type
An N-channel power MOS FET should be used for the MOS FET. In particular, the EXT pin can drive a MOS
FET with a gate capacitance of around 1000 pF. Because the gate voltage and current of the external power
MOS FET are supplied from the stepped-up output voltage (VOUT), the MOS FET is driven more effectively.
A large current may flow during startup, depending on the MOS FET selection. The S-8352 Series does not
feature overcurrent protection for the external MOS FET, so perform sufficient evaluation using the actual devices.
Also recommend to use a MOS FET with an input capacitance of 700 pF or less.
Since the ON-resistance of the MOS FET might depend on the difference between the output voltage (VOUT) and
the threshold voltage of the MOS FET, and affect the output current as well as the efficiency, the threshold voltage
should be low. When the output voltage is as low as 2.0 V, like in the S-8352A20, the circuit operates only
when the MOS FET has a threshold voltage lower than the output voltage.
21
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
4. 2 Bipolar (NPN) Type
A circuit example using the CPH3210 (hFE = 200 to 560) from Sanyo Electric Co., Ltd. as a bipolar transistor
(NPN) is shown in Figure 24 to 26 in the “ Standard Circuits”. The hFE value and Rb value of the bipolar
transistor determine the driving capacity to increase the output current using a bipolar transistor. A peripheral
circuit example of the transistor is shown in Figure 20.
VOUT*1
Cb
2200 pF
IPK
Pch
Nch
EXT
Rb
1 kΩ
*1. VDD for D type.
Figure 20 External Transistor Peripheral Circuit
The recommended Rb value is around 1 kΩ. Actually, calculate the necessary base current (Ib) from the bipolar
IPK
VOUT − 0.7
0.4
*1
transistor (hFE) using Ib =
, and select the smaller Rb value than Rb =
−
.
hFE
Ib
IEXTH
A small Rb value can increase the output current, but the efficiency decreases. Since a current may flow on the
pulse and the voltage may drop due to wiring resistance or other factors in the actual circuit, therefore the
optimum Rb value should be determined by experiment.
Connecting the speed-up capacitor (Cb) in parallel with the Rb resistance as shown in Figure 20, decreases
switching loss and improves the efficiency.
1
The Cb value is calculated according to Cb ≤
.
2π •Rb • fosc • 0.7
Select a Cb value after performing sufficient evaluation since the optimum Cb value differs depending upon the
characteristics of the bipolar transistor.
VDD − 0.7
0.4
*1. For D type, Rb =
−
.
Ib
IEXTH
22
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
5. VDD / VOUT Separate Type (For S-8351/8352 Series D Type)
The D type provides separate internal circuit power supply (VDD pin) and output voltage setting pin (VOUT pin) in the
IC, making it ideal for the following applications.
(1) Changing the output voltage value using an external resistor
(2) Setting a high output voltage value, such as +15 V
Cautions 1. This IC starts a step-up operation at VDD = 0.8 V, but set 1.8 ≤ VDD ≤ 10 V to stabilize the output
voltage and frequency of the oscillator. (Input a voltage of 1.8 V or more at the VDD pin for all
products with a setting less than 1.9 V.) An input voltage of 1.8 V or more at the VDD pin allows
connection of the VDD pin to either the input voltage VIN pin or output VOUT pin.
2. Choose external resistors RA and RB so as to not affect the output voltage, considering that there
is impedance between the VOUT pin and VSS pin in the IC chip. The internal resistance
between the VOUT pin and VSS pin is as follows :
(1) S-835xx18 : 2.1 MΩ to 14.8 MΩ
(2) S-835xx20 : 1.4 MΩ to 14.8 MΩ
(3) S-835xx30 : 1.4 MΩ to 14.2 MΩ
(4) S-835xx50 : 1.4 MΩ to 12.1 MΩ
3. Attach a capacitor (CC) in parallel to the RA resistance when an unstable event such as
oscillation of the output voltage occurs. Calculate CC using the following equation :
1
CC [ F ] =
2• π •RA • 20 kHz
23
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
Standard Circuits
1. S-8351 Series
(1) A type
SD
VOUT
CONT
L
Protection
circuit
VREF
VIN
+
−
+
−
PFM control
circuit
CIN
CL
+
−
VSS
ON/ OFF
Figure 21
(2) B and C types
SD
VOUT
CONT
L
Protection
circuit
VREF
VIN
+
−
+
−
PFM control
circuit
CIN
CL
+
−
VSS
Figure 22
24
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
(3) D type
SD
CONT
VDD
L
Cc
RA
IC internal
power
supply
Protection
circuit
VREF
VIN
VOUT
RB
+
−
+
−
PFM control
circuit
CIN
CL
+
−
VSS
Figure 23
Caution The above connection diagram will not guarantee successful operation. Perform through
evaluation using the actual application to set the constant.
25
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
2. S-8352 Series
(1) A type
SD
VOUT
L
VREF
2200 pF
VIN
+
−
+
−
PFM control
CIN
CL
+
−
circuit
EXT
1 kΩ
VSS
ON/ OFF
Figure 24
(2) B and C types
SD
VOUT
L
VREF
2200 pF
VIN
+
−
+
−
PFM control
circuit
CIN
CL
+
−
EXT
1 kΩ
VSS
Figure 25
26
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
(3) D type
SD
VDD
L
Cc
RA
IC internal
power
supply
VREF
2200 pF
VOUT
VIN
RB
+
−
+
−
PFM control
circuit
CIN
+
−
CL
EXT
1 kΩ
VSS
Figure 26
Caution The above connection diagram and constants will not guarantee successful operation. Perform
through evaluation using the actual application to set the constant.
27
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
Precautions
• Mount the external capacitors, the diode, and the coil as close as possible to the IC.
• Characteristics ripple voltage and spike noise occur in IC containing switching regulators. Moreover, rush current
flows at the time of a power supply injection. Because they largely depend on the coil and the capacitor and
impedance used, fully check them using an actually mounted model.
• Make sure that the dissipation of the switching transistor (especially at a high temperature) does not exceed the
allowable power dissipation of the package.
• The performance of this IC varies depending on the design of the PCB patterns, peripheral circuits and external parts.
Thoroughly test all settings with your device. Also, try to use the recommended external parts. If not, contact an SII
Semiconductor Corporation sales person.
• When the impedance of the power supply is high, the shutdown pin is switched from “L” to “H”, or VIN is connected to
the power supply, note that the power supply voltage drops temporarily because a rush current flows into the power
supply.
• Do not apply an electrostatic discharge to this IC that exceeds the performance ratings of the built-in electrostatic
protection IC.
• SII Semiconductor Corporation claims no responsibility for any and all disputes arising out of or in connection with any
infringement of the products including this IC upon patents owned by third party.
28
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
Characteristics (Typical Data)
1. Input voltage (VIN) vs. Powe Supply Input Current at No Load (IIN)
Ta = 25°C
50
S-8351A30MC
S-8351A50MC
45
40
35
30
25
20
15
10
5
0
0
1
2
3
4
5
VIN [V]
2. Output Voltage (VOUT) vs. Current Consumption 1 (ISS1
)
S-8351A
S-8352A
80
Ta = 25 °C
Ta = 25 °C
80
60
40
20
0
60
40
20
0
1
1
2
3
4
5
6
7
2
3
4
5
6
7
VOUT [V]
VOUT [V]
3. Temperature (Ta) vs. Current Consumption 1 (ISS1
)
50
50
40
30
S-8351A30MC
S-8351A50MC
S-8352A30MC
S-8352A50MC
40
30
20
10
0
20
10
0
−50 −25
0
25 50 75 100
Ta [°C]
−50 −25
0
25 50 75 100
Ta [°C]
4. Output Voltage (VOUT) vs. Current Consumption 2 (ISS2
)
5. Temperature (Ta) vs. Current Consumption 2 (ISS2)
Ta = 25°C
5
5
S-8351A30MC
S-8351A50MC
4
4
3
3
2
1
0
2
1
0
1
2
3
4
5
6
7
−50 −25
0
25 50 75 100
Ta [°C]
VOUT [V]
29
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
6. Temperature (Ta) vs. Oscillation Frequency (fOSC
)
140
S-8351A30MC
S-8351A50MC
130
120
110
100
90
80
−50 −25
0
25 50 75 100
Ta [°C]
7. Temperature (Ta) vs. Duty Ratio 1 (Duty1)
8. Temperature (Ta) vs. Duty Ratio 2 (Duty2)
80
55
53
S-8351A30MC
S-8351A50MC
78
76
51
49
74
72
70
S-8351A30MC
47
S-8351A50MC
45
−50 −25
0
25 50 75 100
Ta [°C]
−50 −25
0
25 50 75 100
Ta [°C]
9. Output Voltage (VOUT) vs. Switching Current (ISW
)
10. Temperature (Ta) vs. Switching Current (ISW)
Ta = 25°C
300
400
350
300
250
200
150
250
200
150
100
50
0
100
50
S-8351A30MC
S-8351A50MC
0
−50 −25
0
25 50 75 100
Ta [°C]
0
1
2
3
4
5
6
7
VOUT [V]
11. Output Voltage (VOUT) vs. EXT Pin Output Current “H” (IEXTH) 12. Temperature (Ta) vs. EXT Pin Output Current “H” (IEXTH
)
Ta = 25°C
35
30
25
20
15
10
5
40
30
20
10
0
S-8352A30MC
S-8352A50MC
0
−50 −25
0
25 50 75 100
Ta [°C]
0
1
2
3
4
5
6
7
VOUT [V]
30
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
13. Output Voltage (VOUT) vs. EXT Pin Output Current “L” (IEXTL) 14. Temperature (Ta) vs. EXT Pin Output Current “L” (IEXTL
)
Ta = 25°C
35
40
30
25
30
20
10
0
20
15
10
5
S-8352A30MC
S-8352A50MC
0
0
1
2
3
4
5
6
7
−50 −25
0
25 50 75 100
Ta [°C]
VOUT [V]
15. Temperature (Ta) vs. Operation Start Voltage (VST1
)
16. Temperature (Ta) vs. Retention Voltage (VHLD)
0.8
S-8351A30MC
S-8351A50MC
1.0
0.9
0.8
0.7
0.6
S-8351A30MC
S-8351A50MC
0.7
0.6
0.5
0.4
0.3
0.2
−50 −25
−50 −25
0
25 50 75 100
Ta [°C]
0
25 50 75 100
Ta [°C]
31
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
17. Transient Response Characteristics
The conditions for external parts are the same as those specified in the electrical characteristics.
(1) Power-on (Ta = 25°C, RL = 250 Ω)
S-8351A30MC
S-8351A50MC
VIN = 0 → 1.8 V
VIN = 0 → 3 V
1.8 V
3 V
Input voltage
[0.5 V / div]
0 V
3 V
5 V
Input voltage
[1 V / div]
0 V
Output voltage
[1 V / div]
Output voltage
[0.5 V / div]
0 V
0 V
t [0.2 ms / div]
t [0.2 ms / div]
S-8352A30MC
S-8352A50MC
VIN = 0 → 1.8 V
VIN = 0 → 3 V
1.8 V
3 V
Input voltage
[0.5 V / div]
3 V
5 V
Input voltage
[1 V / div]
0 V
0 V
Output voltage
[1 V / div]
Output voltage
[0.5 V / div]
0 V
0 V
t [0.2 ms / div]
t [0.2 ms / div]
(2) Power Supply Voltage Fluctuation (Ta = 25°C, RL = 250 Ω)
S-8351A30MC
S-8351A30MC
VIN = 1.2 → 1.8 V
VIN = 1.8 → 1.2 V
Input voltage
[0.5 V /div]
1.8 V
Input voltage
[0.5 V / div]
1.8 V
3 V
1.2 V
3 V
1.2 V
Output voltage
[0.1 V / div]
Output voltage
[0.1 V / div]
t [0.1 ms / div]
t [0.1 ms / div]
S-8351A50MC
S-8351A50MC
VIN = 2 → 3 V
VIN = 3 → 2 V
Input voltage
[0.5 V / div]
3 V
3 V
5 V
Input voltage
[0.5 V / div]
2 V
2 V
5 V
Output voltage
[0.1 V / div]
Output voltage
[0.1 V / div]
t [0.1 ms / div]
t [0.1 ms / div]
32
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
S-8352A30MC
Input voltage
S-8352A30MC
1.8 V
Input voltage
[0.5 V / div]
VIN = 1.2 → 1.8 V
VIN = 1.8 → 1.2 V
1.8 V
3 V
[0.5 V /div]
1.2 V
1.2 V
Output voltage
[0.1 V / div]
Output voltage
[0.1 V / div]
3 V
t [0.1 ms / div]
t [0.1 ms / div]
S-8352A50MC
S-8352A50MC
VIN = 2 → 3 V
VIN = 3 → 2 V
Input voltage
[0.5 V /div]
3 V
5 V
3 V
Input voltage
[0.5 V / div]
2 V
2 V
5 V
Output voltage
[0.1 V / div]
Output voltage
[0.1 V / div]
t [0.1 ms / div]
t [0.1 ms / div]
(3) Load Current Fluctuation (Ta = 25°C)
S-8351A30MC
S-8351A30MC
VIN = 1.8 V, IOUT = 10 μA → 12 mA
VIN = 1.8 V, IOUT = 12 mA → 10 μA
Output current
IOUT = 12 mA
Output current
IOUT = 10 μA
Output voltage
[0.1 V / div]
Output voltage
[0.1 V / div]
3 V
3 V
t [0.1 ms / div]
t [0.1 ms / div]
S-8351A50MC
S-8351A50MC
VIN = 3 V, IOUT = 10 μA → 20 mA
VIN = 3 V, IOUT = 20 mA → 10 μA
Output current
IOUT = 20 mA
Output current
IOUT = 10 μA
Output voltage
[0.1 V / div]
Output voltage
[0.1 V / div]
5 V
5 V
t [0.1 ms / div]
t [0.1 ms / div]
33
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
S-8352A30MC
S-8352A30MC
VIN = 1.8 V, IOUT = 12 mA → 10 μA
VIN = 1.8 V, IOUT = 10 μA → 12 mA
Output current
Output current
IOUT = 12 mA
IOUT = 10 μA
Output voltage
[0.1 V / div]
Output voltage
[0.1 V / div]
3 V
3 V
t [0.1 ms / div]
t [0.1 ms / div]
S-8352A50MC
S-8352A50MC
VIN = 3 V, IOUT = 20 mA → 10 μA
VIN = 3 V, IOUT = 10 μA → 20 mA
IOUT = 20 mA
Output current
IOUT = 10 μA
Output current
Output voltage
[0.1 V / div]
Output voltage
[0.1 V / div]
5 V
5 V
t [0.1 ms / div]
t [0.1 ms / div]
(4) ON/OFF Pin Response (Ta = 25°C, RL = 250 Ω)
S-8351A30MC
VIN = 1.8 V
S-8351A50MC
VIN = 3 V
ON/ OFF voltage
ON
ON
ON/ OFF voltage
OFF
OFF
3 V
5 V
Output voltage
[0.3 V / div]
Output voltage
[0.5 V / div]
t [0.1 ms / div]
t [0.1 ms / div]
S-8352A30MC
S-8352A50MC
VIN = 1.8 V
VIN = 3 V
ON/ OFF voltage
ON
ON/ OFF voltage
ON
OFF
OFF
3 V
5 V
Output voltage
[0.3 V / div]
Output voltage
[0.5 V / div]
t [0.1 ms / div]
t [0.1 ms / div]
34
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
Reference Data
Use this reference data to choose the external parts. This reference data makes it possible to choose the
recommended external part based on the application and characteristics data.
1. External Parts for Reference Data
Table 18
Output
Power
Condition
Product Name
Voltage
V
Coil
MOS FET
1
2
S-8351A30MC
S-8351A30MC
S-8351A30MC
S-8351A50MC
S-8351A50MC
S-8351A50MC
S-8352A30MC
S-8352A30MC
S-8352A30MC
S-8352A50MC
S-8352A50MC
S-8352A50MC
3.0
3.0
3.0
5.0
5.0
5.0
3.0
3.0
3.0
5.0
5.0
5.0
Built-in
Built-in
CDRH6D28-470
CDRH6D28-101
CXLP120-101
CDRH6D28-101
CDRH125-221
CXLP120-470
CDRH6D28-220
CDRH6D28-101
CXLP120-470
CDRH6D28-220
CDRH6D28-101
CXLP120-101
3
Built-in
4
Built-in
5
Built-in
6
Built-in
7
External
External
External
External
External
External
8
9
10
11
12
The properties of the external parts are shown below.
Table 19 Evaluation coil
Part
Product Name
Manufacturer
Characteristics
CDRH6D28-220 Sumida Corporation
CDRH6D28-470 Sumida Corporation
CDRH6D28-101 Sumida Corporation
22 μH, DCR *1 = 0.128 Ω, IMAX *2 = 1200 mA
47 μH, DCR *1 = 0.238 Ω, IMAX *2 = 800 mA
100 μH, DCR *1 = 0.535 Ω, IMAX *2 = 540 mA
220 μH, DCR *1 = 0.4 Ω, IMAX *2 = 800 mA
Coil
CDRH125-221
CXLP120-470
CXLP120-101
Sumida Corporation
Sumitomo Special Metals Co., Ltd 47 μH, DCR *1 = 0.95 Ω, IMAX *2 = 450 mA
Sumitomo Special Metals Co., Ltd 100 μH, DCR *1 = 2.5 Ω, IMAX *2 = 200 mA
*1. Direct current resistance
*2. Maximum allowable current
Table 20 Properties of External Parts
Part
Diode
Product Name
MA2Z748
Manufacturer
Characteristics
Matsushita Electronic Components VF*1 = 0.4V, IF*2 = 0.3A
Co., Ltd.
(Shottky type)
Capacitor
(Output
capacitance)
16V, 47μF
(Tantalum type)
F93
Nichicon Corporation
VCBO*3 = 40V, VCEO*4 = 30V
hFE*5 = 200 min. (VCE = 2V, IC = 500mA)
fT*6 = 290 MHz typ. (VCE = 10V, IC = 500mA)
Transistor
(NPN)
CPH3210
Sanyo Electric Co.,Ltd.
*1. Forward voltage, *2. Forward current, *3. Collector-to-base voltage, *4. Collector-to-emitter voltage, *5. DC
current gain, *6. Gain-bandwidth product
Caution The above values shown in the characteristics column of Table 19 and 20 are based on the
materials provided by each manufacture. However, consider the characteristics of the original
materials when using the above products.
35
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
2. Step-up Characteristics (Ta = 25°C)
The data of the step-up characteristics ((a) Input voltage (VIN) vs. Output voltage (VOUT) characteristics (Input voltage
stepped up), (b) Input voltage (VIN) vs. Output voltage (VOUT) characteristics (Input voltage stepped down), (c) Output
current (IOUT) vs. Output voltage (VOUT) characteristics, (d) Output current (IOUT) vs. Efficiency (η) characteristics
under conditions of 1 to 12 in Table 18 is shown below.
Condition 1 S-8351A30MC
(a) Input voltage (VIN) vs. Output voltage (VOUT
)
(b) Input voltage (VIN) vs. Output voltage (VOUT)
(Input voltage raising)
3.2
(Input voltage falling)
3.2
3.1
3.0
3.1
3.0
IOUT
IOUT
IOUT
IOUT
IOUT
IOUT
=
=
=
=
=
=
0.1 mA
1 mA
2.9
IOUT
IOUT
IOUT
IOUT
IOUT
IOUT
=
=
=
=
=
=
0.1 mA
1 mA
2.9
2.8
2.7
2.6
10 mA
20 mA
50 mA
100 mA
10 mA
20 mA
50 mA
100 mA
2.8
2.7
2.6
0
1
2
3
4
0
1
2
3
4
VIN [V]
VIN [V]
(c) Output current (IOUT) vs.Output voltage (VOUT
3.2
)
(d) Output current (IOUT) vs. Efficiency (
90
η)
VIN
VIN
VIN
=
=
=
1.0 V,
1.5 V,
1.8 V
VIN
VIN
=
2.0 V
2.5 V
=
3.1
3.0
2.9
2.8
2.7
2.6
80
70
VIN
VIN
VIN
VIN
VIN
=
=
=
=
=
1.0 V
1.5 V
1.8 V
2.0 V
2.5 V
60
50
0.01
0.1
1
10
100 1000
0
50
100
150
200
250
IOUT [mA]
IOUT [mA]
Condition 2 S-8351A30MC
(a) Input voltage (VIN) vs. Output voltage (VOUT
)
(b) Input voltage (VIN) vs. Output voltage (VOUT)
(Input voltage raising)
3.2
(Input voltage falling)
3.2
3.1
3.0
2.9
3.1
3.0
IOUT
IOUT
IOUT
IOUT
IOUT
IOUT
=
=
=
=
=
=
0.1 mA
IOUT
IOUT
IOUT
IOUT
IOUT
IOUT
=
=
=
=
=
=
0.1 mA
1 mA
2.9
2.8
2.7
2.6
1 mA
2.8
2.7
2.6
10 mA
20 mA
50 mA
10 mA
20 mA
50 mA
100 mA
100 mA
0
1
2
3
4
0
1
2
3
4
VIN [V]
VIN [V]
(c) Output current (IOUT) vs.Output voltage (VOUT
3.2
)
(d) Output current (IOUT) vs. Efficiency (
90
η)
VIN
VIN
VIN
=
=
=
1.0 V,
1.5 V,
1.8 V
VIN
VIN
=
2.0 V
2.5 V
3.1
=
80
70
3.0
2.9
2.8
2.7
2.6
VIN
VIN
VIN
VIN
VIN
=
=
=
=
=
1.0 V
1.5 V
1.8 V
2.0 V
2.5 V
60
50
0.01
0.1
1
10
100
1000
0
50
100
150
200
250
IOUT [mA]
IOUT [mA]
36
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
Condition 3 S-8351A30MC
(a) Input voltage (VIN) vs. Output voltage (VOUT
)
(b) Input voltage (VIN) vs. Output voltage (VOUT
)
(Input voltage raising)
3.2
(Input voltage falling)
3.2
3.1
3.0
2.9
3.1
3.0
2.9
2.8
2.7
IOUT
IOUT
IOUT
IOUT
IOUT
=
=
=
=
=
0.1 mA
1 mA
IOUT
IOUT
IOUT
IOUT
IOUT
=
=
=
=
=
0.1 mA
1 mA
2.8
2.7
2.6
10 mA
20 mA
50 mA
10 mA
20 mA
50 mA
2.6
0
0
1
2
3
4
1
2
3
4
VIN [V]
VIN [V]
(c) Output current (IOUT) vs.Output voltage (VOUT
3.2
)
(d) Output current (IOUT) vs. Efficiency (
90
η)
3.1
3.0
2.9
80
70
VIN
VIN
VIN
VIN
VIN
=
=
=
=
=
1.0 V
1.5 V
1.8 V
2.0 V
2.5 V
VIN
VIN
VIN
VIN
VIN
=
1.0 V
1.5 V
1.8 V
2.0 V
2.5 V
=
=
=
=
2.8
2.7
2.6
60
50
0.01
0
50
100
IOUT [mA]
150
200
250
0.1
1
10
100
1000
IOUT [mA]
Condition 4 S-8351A50MC
(a) Input voltage (VIN) vs. Output voltage (VOUT
)
(b) Input voltage (VIN) vs. Output voltage (VOUT)
(Input voltage raising)
5.2
(Input voltage falling)
5.2
5.1
5.0
5.1
5.0
IOUT
IOUT
IOUT
IOUT
IOUT
IOUT
=
=
=
=
=
=
0.1 mA
IOUT
IOUT
IOUT
IOUT
IOUT
IOUT
=
=
=
=
=
=
0.1 mA
4.9
4.8
4.7
4.6
4.9
4.8
1 mA
1 mA
10 mA
50 mA
100 mA
150 mA
10 mA
50 mA
100 mA
150 mA
4.7
4.6
0
1
2
3
4
5
6
0
1
2
3
4
5
6
VIN [V]
VIN [V]
(c) Output current (IOUT) vs.Output voltage (VOUT
5.2
)
(d) Output current (IOUT) vs. Efficiency (
100
η)
VIN
VIN
VIN
=
=
=
1.5 V
2.0 V
3.0 V
5.1
5.0
4.9
4.8
90
80
VIN
VIN
VIN
VIN
VIN
=
=
=
=
=
1.0 V
1.5 V
2.0 V
3.0 V
4.0 V
70
60
4.7
4.6
0.01
0.1
1
10
100
1000
0
50
100
150
200
250
IOUT [mA]
IOUT [mA]
37
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
Condition 5 S-8351A50MC
(a) Input voltage (VIN) vs. Output voltage (VOUT
)
(b) Input voltage (VIN) vs. Output voltage (VOUT)
(Input voltage raising)
5.2
(Input voltage falling)
5.2
5.1
5.0
5.1
5.0
4.9
4.8
IOUT
IOUT
IOUT
IOUT
IOUT
IOUT
=
=
=
=
=
=
0.1 mA
1 mA
IOUT
IOUT
IOUT
IOUT
IOUT
IOUT
=
=
=
=
=
=
0.1 mA
1 mA
4.9
4.8
4.7
4.6
10 mA
50 mA
100 mA
150 mA
10 mA
50 mA
100 mA
150 mA
4.7
4.6
0
1
2
3
4
5
6
0
2
3
4
5
6
1
VIN [V]
VIN [V]
(c) Output current (IOUT) vs.Output voltage (VOUT
)
(d) Output current (IOUT) vs. Efficiency (
100
η)
5.2
VIN
VIN
VIN
=
1.5 V
2.0 V
3.0 V
5.1
5.0
4.9
4.8
4.7
4.6
=
=
90
80
VIN
VIN
VIN
VIN
VIN
=
=
=
=
=
1.0 V
1.5 V
2.0 V
3.0 V
4.0 V
70
60
0.01
0.1
1
10
100
1000
0
50
100
150
200
250
IOUT [mA]
IOUT [mA]
Condition 6 S-8351A50MC
(a) Input voltage (VIN) vs. Output voltage (VOUT
)
(b) Input voltage (VIN) vs. Output voltage (VOUT)
(Input voltage raising)
5.2
(Input voltage falling)
5.2
5.1
5.0
5.1
5.0
4.9
4.8
IOUT
IOUT
IOUT
IOUT
IOUT
IOUT
=
=
=
=
=
=
0.1 mA
IOUT
IOUT
IOUT
IOUT
IOUT
IOUT
=
=
=
=
=
=
0.1 mA
4.9
4.8
1 mA
1 mA
10 mA
50 mA
100 mA
150 mA
10 mA
50 mA
100 mA
150 mA
4.7
4.6
4.7
4.6
0
1
2
3
4
5
6
0
1
2
3
4
5
6
VIN [V]
VIN [V]
(c) Output current (IOUT) vs.Output voltage (VOUT
5.2
)
(d) Output current (IOUT) vs. Efficiency (
90
η)
VIN
VIN
VIN
=
=
=
1.5 V
2.0 V
3.0 V
5.1
5.0
4.9
4.8
4.7
4.6
80
70
VIN
VIN
VIN
VIN
VIN
=
=
=
=
=
1.0 V
1.5 V
2.0 V
3.0 V
4.0 V
60
50
0
50
100
150
200
250
0.01
0.1
1
10
100
1000
IOUT [mA]
IOUT [mA]
38
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
Condition 7 S-8352A30MC
(a) Input voltage (VIN) vs. Output voltage (VOUT
)
(b) Input voltage (VIN) vs. Output voltage (VOUT
)
(Input voltage raising)
3.2
(Input voltage falling)
3.2
3.1
3.0
3.1
3.0
2.9
2.8
IOUT
IOUT
IOUT
IOUT
IOUT
IOUT
=
=
=
=
=
=
0.1 mA
1 mA
IOUT
IOUT
IOUT
IOUT
IOUT
IOUT
=
=
=
=
=
=
0.1 mA
1 mA
2.9
0 mA
10 mA
50 mA
100 mA
150 mA
2.8
2.7
2.6
50 mA
100 mA
150 mA
2.7
2.6
0
0
1
2
3
4
1
2
3
4
VIN [V]
VIN [V]
(c) Output current (IOUT) vs.Output voltage (VOUT
)
(d) Output current (IOUT) vs. Efficiency (
90
η)
3.2
3.1
80
70
3.0
2.9
2.8
2.7
VIN
VIN
VIN
VIN
=
=
=
=
1.5 V
1.8 V
2.0 V
2.5 V
VIN
VIN
VIN
VIN
=
=
=
=
1.5 V
1.8 V
2.0 V
2.5 V
60
50
2.6
0
50 100 150 200 250 300 350
IOUT [mA]
0.01
0.1
1
10
100
1000
IOUT [mA]
Condition 8 S-8352A30MC
(a) Input voltage (VIN) vs. Output voltage (VOUT
)
(b) Input voltage (VIN) vs. Output voltage (VOUT)
(Input voltage raising)
3.2
(Input voltage falling)
3.2
3.1
3.0
3.1
3.0
IOUT
IOUT
IOUT
IOUT
IOUT
IOUT
=
=
=
=
=
=
0.1 mA
1 mA
IOUT
IOUT
IOUT
IOUT
IOUT
IOUT
=
=
=
=
=
=
0.1 mA
2.9
2.8
2.7
2.9
1 mA
10 mA
50 mA
100 mA
150 mA
10 mA
50 mA
100 mA
150 mA
2.8
2.7
2.6
2.6
0
1
2
3
4
0
1
2
3
4
VIN [V]
VIN [V]
(c) Output current (IOUT) vs.Output voltage (VOUT
)
(d) Output current (IOUT) vs. Efficiency (
90
η)
3.2
3.1
3.0
2.9
80
70
VIN
VIN
VIN
VIN
=
=
=
=
1.5 V
1.8 V
2.0 V
2.5 V
2.8
VIN
VIN
VIN
VIN
=
=
=
=
1.5 V
1.8 V
2.0 V
2.5 V
60
50
2.7
2.6
0.01
0.1
1
10
100
1000
0
50 100 150 200 250 300 350
IOUT [mA]
IOUT [mA]
39
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
Condition 9 S-8352A30MC
(a) Input voltage (VIN) vs. Output voltage (VOUT
)
(b) Input voltage (VIN) vs. Output voltage (VOUT)
(Input voltage raising)
3.2
(Input voltage falling)
3.2
3.1
3.0
3.1
3.0
IOUT
IOUT
IOUT
IOUT
IOUT
IOUT
=
=
=
=
=
=
0.1 mA
1 mA
IOUT
IOUT
IOUT
IOUT
IOUT
IOUT
=
=
=
=
=
=
0.1 mA
1 mA
2.9
2.8
2.9
2.8
2.7
2.6
10 mA
50 mA
100 mA
150 mA
10 mA
50 mA
100 mA
150 mA
2.7
2.6
0
1
2
3
4
0
1
2
3
4
VIN [V]
VIN [V]
(c) Output current (IOUT) vs.Output voltage (VOUT
)
(d) Output current (IOUT) vs. Efficiency (
90
η)
3.2
3.1
80
70
3.0
2.9
VIN
VIN
VIN
VIN
=
=
=
=
1.5 V
1.8 V
2.0 V
2.5 V
VIN
VIN
VIN
VIN
=
1.5 V
1.8 V
2.0 V
2.5 V
2.8
2.7
2.6
60
50
=
=
=
0.01
0.1
1
10
100
1000
0
50 100 150 200 250 300 350
IOUT [mA]
IOUT [mA]
Condition 10 S-8352A50MC
(a) Input voltage (VIN) vs. Output voltage (VOUT
)
(b) Input voltage (VIN) vs. Output voltage (VOUT
(Input voltage falling)
)
(Input voltage raising)
5.2
5.2
5.1
5.1
5.0
5.0
4.9
IOUT
=
0.1 mA
1 mA
IOUT
IOUT
IOUT
IOUT
IOUT
IOUT
=
=
=
=
=
=
0.1 mA
1 mA
4.9
IOUT
=
=
=
=
=
IOUT
IOUT
IOUT
IOUT
10 mA
50 mA
4.8
4.7
4.6
10 mA
50 mA
100 mA
150 mA
4.8
4.7
4.6
100 mA
150 mA
0
1
2
3
4
5
6
0
1
2
3
4
5
6
VIN [V]
VIN [V]
(c) Output current (IOUT) vs.Output voltage (VOUT
)
(d) Output current (IOUT) vs. Efficiency (
90
η)
5.2
5.1
80
70
60
50
5.0
4.9
4.8
4.7
4.6
VIN
VIN
VIN
VIN
=
=
=
=
1.5 V
2.0 V
3.0 V
4.0 V
VIN
VIN
VIN
=
=
=
2.0 V
3.0 V
4.0 V
0.01
0.1
1
10
100
1000
0
50 100 150 200 250 300 350 400 450
IOUT [mA]
IOUT [mA]
40
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLER
Rev.3.0_01
S-8351/8352 Series
Condition 11 S-8352A50MC
(a) Input voltage (VIN) vs. Output voltage (VOUT
)
(b) Input voltage (VIN) vs. Output voltage (VOUT
)
(Input voltage raising)
5.2
(Input voltage falling)
5.2
5.1
5.0
5.1
5.0
IOUT
IOUT
IOUT
IOUT
IOUT
IOUT
=
=
=
=
=
=
0.1 mA
1 mA
IOUT
IOUT
IOUT
IOUT
IOUT
IOUT
=
=
=
=
=
=
0.1 mA
1 mA
4.9
4.8
4.7
4.6
4.9
4.8
4.7
4.6
10 mA
50 mA
100 mA
150 mA
10 mA
50 mA
100 mA
150 mA
0
1
2
3
4
5
6
0
1
2
3
4
5
6
VIN [V]
VIN [V]
(c) Output current (IOUT) vs.Output voltage (VOUT
5.2
)
(d) Output current (IOUT) vs. Efficiency (
90
η)
5.1
5.0
80
70
60
50
4.9
VIN
VIN
VIN
VIN
=
=
=
=
1.5 V
2.0 V
3.0 V
4.0 V
4.8
4.7
4.6
VIN
=
2.0 V
3.0 V
4.0 V
VIN
VIN
=
=
0
50 100 150 200 250 300 350 400 450
IOUT [mA]
0.01
0.1
1
10
100 1000
IOUT [mA]
Condition 12 S-8352A50MC
(a) Input voltage (VIN) vs. Output voltage (VOUT
)
(b) Input voltage (VIN) vs. Output voltage (VOUT)
(Input voltage raising)
5.2
(Input voltage falling)
5.2
5.1
5.0
4.9
5.1
5.0
4.9
IOUT
IOUT
IOUT
IOUT
IOUT
=
=
=
=
=
0.1 mA
1 mA
IOUT
IOUT
IOUT
IOUT
IOUT
=
=
=
=
=
0.1 mA
1 mA
4.8
4.7
4.6
4.8
4.7
4.6
10 mA
50 mA
100 mA
10 mA
50 mA
100 mA
0
1
2
3
4
5
6
0
1
2
3
4
5
6
VIN [V]
VIN [V]
(c) Output current (IOUT) vs.Output voltage (VOUT
)
(d) Output current (IOUT) vs. Efficiency (
90
η)
5.2
5.1
5.0
4.9
80
70
4.8
4.7
4.6
VIN
VIN
VIN
=
=
=
2.0 V
3.0 V
4.0 V
60
50
VIN
VIN
=
3.0 V
4.0 V
=
0.01
0.1
1
10
100
1000
0
50 100 150 200 250 300 350 400 450
IOUT [mA]
IOUT [mA]
41
2.9±0.2
1
2
3
+0.1
0.95±0.1
0.16
-0.05
1.9±0.2
0.4±0.1
No. MP003-A-P-SD-1.1
TITLE
SOT233-A-PKG Dimensions
MP003-A-P-SD-1.1
No.
SCALE
UNIT
mm
SII Semiconductor Corporation
+0.1
4.0±0.1
2.0±0.1
1.5
-0.05
0.25±0.05
1.6±0.1
1.1±0.1
4.0±0.1
2.85±0.2
3
2
1
Feed direction
No. MP003-A-C-SD-1.1
SOT233-A-Carrier Tape
MP003-A-C-SD-1.1
TITLE
No.
SCALE
UNIT
mm
SII Semiconductor Corporation
12.5max.
9.0±0.3
Enlarged drawing in the central part
ø13±0.2
(60°)
(60°)
No. MP003-A-R-SD-1.1
SOT233-A-Reel
MP003-A-R-SD-1.1
TITLE
No.
SCALE
UNIT
3,000
QTY.
mm
SII Semiconductor Corporation
2.9±0.2
1.9±0.2
4
5
+0.1
-0.06
1
2
3
0.16
0.95±0.1
0.4±0.1
No. MP005-A-P-SD-1.2
TITLE
SOT235-A-PKG Dimensions
MP005-A-P-SD-1.2
No.
SCALE
UNIT
mm
SII Semiconductor Corporation
4.0±0.1(10 pitches:40.0±0.2)
+0.1
-0
2.0±0.05
0.25±0.1
ø1.5
+0.2
-0
4.0±0.1
ø1.0
1.4±0.2
3.2±0.2
3
4
2 1
5
Feed direction
No. MP005-A-C-SD-2.1
TITLE
SOT235-A-Carrier Tape
MP005-A-C-SD-2.1
No.
SCALE
UNIT
mm
SII Semiconductor Corporation
12.5max.
9.0±0.3
Enlarged drawing in the central part
ø13±0.2
(60°)
(60°)
No. MP005-A-R-SD-1.1
TITLE
SOT235-A-Reel
MP005-A-R-SD-1.1
No.
SCALE
UNIT
QTY.
3,000
mm
SII Semiconductor Corporation
4.5±0.1
1.6±0.2
1.5±0.1
1
2
3
1.5±0.1 1.5±0.1
0.4±0.05
45°
0.4±0.1
0.4±0.1
0.45±0.1
No. UP003-A-P-SD-1.1
TITLE
No.
SOT893-A-PKG Dimensions
UP003-A-P-SD-1.1
SCALE
UNIT
mm
SII Semiconductor Corporation
4.0±0.1(10 pitches : 40.0±0.2)
+0.1
-0
ø1.5
2.0±0.05
+0.1
-0
ø1.5
0.3±0.05
2.0±0.1
8.0±0.1
5° max.
4.75±0.1
Feed direction
No. UP003-A-C-SD-1.1
TITLE
No.
SOT893-A-Carrier Tape
UP003-A-C-SD-1.1
SCALE
UNIT
mm
SII Semiconductor Corporation
16.5max.
13.0±0.3
Enlarged drawing in the central part
(60°)
(60°)
No. UP003-A-R-SD-1.1
TITLE
No.
SOT893-A-Reel
UP003-A-R-SD-1.1
SCALE
UNIT
QTY.
1,000
mm
SII Semiconductor Corporation
Disclaimers (Handling Precautions)
1. All the information described herein (product data, specifications, figures, tables, programs, algorithms and
application circuit examples, etc.) is current as of publishing date of this document and is subject to change without
notice.
2. The circuit examples and the usages described herein are for reference only, and do not guarantee the success of
any specific mass-production design.
SII Semiconductor Corporation is not responsible for damages caused by the reasons other than the products or
infringement of third-party intellectual property rights and any other rights due to the use of the information described
herein.
3. SII Semiconductor Corporation is not responsible for damages caused by the incorrect information described herein.
4. Take care to use the products described herein within their specified ranges. Pay special attention to the absolute
maximum ratings, operation voltage range and electrical characteristics, etc.
SII Semiconductor Corporation is not responsible for damages caused by failures and/or accidents, etc. that occur
due to the use of products outside their specified ranges.
5. When using the products described herein, confirm their applications, and the laws and regulations of the region or
country where they are used and verify suitability, safety and other factors for the intended use.
6. When exporting the products described herein, comply with the Foreign Exchange and Foreign Trade Act and all
other export-related laws, and follow the required procedures.
7. The products described herein must not be used or provided (exported) for the purposes of the development of
weapons of mass destruction or military use. SII Semiconductor Corporation is not responsible for any provision
(export) to those whose purpose is to develop, manufacture, use or store nuclear, biological or chemical weapons,
missiles, or other military use.
8. The products described herein are not designed to be used as part of any device or equipment that may affect the
human body, human life, or assets (such as medical equipment, disaster prevention systems, security systems,
combustion control systems, infrastructure control systems, vehicle equipment, traffic systems, in-vehicle equipment,
aviation equipment, aerospace equipment, and nuclear-related equipment), excluding when specified for in-vehicle
use or other uses. Do not use those products without the prior written permission of SII Semiconductor Corporation.
Especially, the products described herein cannot be used for life support devices, devices implanted in the human
body and devices that directly affect human life, etc.
Prior consultation with our sales office is required when considering the above uses.
SII Semiconductor Corporation is not responsible for damages caused by unauthorized or unspecified use of our
products.
9. Semiconductor products may fail or malfunction with some probability.
The user of these products should therefore take responsibility to give thorough consideration to safety design
including redundancy, fire spread prevention measures, and malfunction prevention to prevent accidents causing
injury or death, fires and social damage, etc. that may ensue from the products' failure or malfunction.
The entire system must be sufficiently evaluated and applied on customer's own responsibility.
10. The products described herein are not designed to be radiation-proof. The necessary radiation measures should be
taken in the product design by the customer depending on the intended use.
11. The products described herein do not affect human health under normal use. However, they contain chemical
substances and heavy metals and should therefore not be put in the mouth. The fracture surfaces of wafers and chips
may be sharp. Take care when handling these with the bare hands to prevent injuries, etc.
12. When disposing of the products described herein, comply with the laws and ordinances of the country or region where
they are used.
13. The information described herein contains copyright information and know-how of SII Semiconductor Corporation.
The information described herein does not convey any license under any intellectual property rights or any other
rights belonging to SII Semiconductor Corporation or a third party. Reproduction or copying of the information
described herein for the purpose of disclosing it to a third-party without the express permission of SII Semiconductor
Corporation is strictly prohibited.
14. For more details on the information described herein, contact our sales office.
1.0-2016.01
www.sii-ic.com
相关型号：
S-8351DxxMC
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLERWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
SII
S-8351DXXMC
STEP-UP, BUILT-IN / EXTERNAL FET PFM CONTROL SWITCHING REGULATOR / SWITCHING REGULATOR CONTROLLERWarning: Undefined variable $rtag in /www/wwwroot/website_ic37/www.icpdf.com/pdf/pdf/index.php on line 217
-
ABLIC
S-8352
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-
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S-8352
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-
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