S-1721E2833-I6T1G [SII]
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR; 超小型双电路高纹波抑制率低消耗电流低压差型CMOS电压稳压器
| 型号： | S-1721E2833-I6T1G |
| 厂家： | 
SEIKO INSTRUMENTS INC |
| 描述： | SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR |
| 文件： | 总38页 (文件大小：529K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Rev.1.1_00
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW
CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
S-1721 Series
S-1721 Series, developed using the CMOS technology, is
a 2-channel positive voltage regulator IC which has the
low dropout voltage, the high-accuracy output voltage and
the low output current consumption of 150mA.
Users are able to use a small ceramic capacitor of 1.0 µF
for this IC. This IC includes two regulator circuits in the
package SOT-23-6 or super-small SNT-6A.
S-1721 Series has much lower current consumption than
S-1711 Series, this IC is ideal for mobile devices.
Features
• Output voltage:
1.2 V to 5.0 V, selectable in 0.05 V step.
• A ceramic capacitor of 1.0 µF or more can be used as the I/O capacitor.
• Wide input voltage range:
• High-accuracy output voltage:
• Low dropout voltage:
1.7 V to 6.5 V
1.0%
130 mV typ. (products having the output of 3.0 V, IOUT = 100 mA)
• Low current consumption:
During operation:
3.0 V, per circuit)
25 µA typ., 45 µA max. (products having the output of
During shutdown: 0.1 µA typ., 1.0 µA max.
Possible to output 150 mA (at VIN ≥ VOUT(S) + 1.0 V)*1 (per circuit)
80 dB typ. (products having the output under 1.8 V, at 1.0 kHz)
limits overcurrent of output transistor
• Output current:
• High ripple rejection:
• Built-in overcurrent protector:
• Built-in ON/OFF circuit:
Ensures long battery life.
• Pull-up or pull-down resistor can be selected.
• Small package:
• Lead-free product
SNT-6A, SOT-23-6
*1. Attention should be paid to the power dissipation of the package when the output current is large.
Applications
• Power supply for cellular phones
• Power supply for battery-powered devices
Packages
Drawing Code
Package Name
Package
PG006-A
MP006-A
Tape
Reel
Land
PG006-A
−
SNT-6A
SOT-23-6
PG006-A
MP006-A
PG006-A
MP006-A
Seiko Instruments Inc.
1
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.1.1_00
S-1721 Series
Block Diagrams
1. S-1721 Series A type
*1
Function
ON/OFF logic
Status
1ch Active “H”
2ch Active “H”
1ch None
ON/OFF1
VOUT1
Overcurrent
protector
Pull-up resistor
2ch None
1ch Available
2ch Available
ON/OFF
circuit
+
−
Pull-down resistor
Reference
voltage circuit
*1
VIN
VSS
Overcurrent
protector
ON/OFF
circuit
+
−
Reference
voltage circuit
ON/OFF2
VOUT2
VOUT1
*1. Parasitic diode
Figure
1
2. S-1721 Series B type
*1
Function
ON/OFF logic
Status
1ch Active “H”
2ch Active “L”
1ch None
ON/OFF1
Overcurrent
protector
Pull-up resistor
2ch Available
1ch Available
2ch None
ON/OFF
circuit
+
−
Pull-down resistor
Reference
voltage circuit
*1
VIN
VSS
Overcurrent
protector
ON/OFF
circuit
+
−
Reference
voltage circuit
ON/OFF2
VOUT2
*1. Parasitic diode
Figure
2
2
Seiko Instruments Inc.
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOSSVO-L1T7AG2E1RESGUeLrAiTeOsR
Rev.1.1_00
3. S-1721 Series C type
*1
Function
ON/OFF logic
Status
Active “L”
Active “H”
Available
None
ON/OFF1
VOUT1
1ch
2ch
1ch
2ch
1ch
2ch
Overcurrent
protector
Pull-up resistor
ON/OFF
circuit
+
−
Pull-down resistor
None
Available
Reference
voltage circuit
*1
VIN
VSS
Overcurrent
protector
ON/OFF
circuit
+
−
Reference
voltage circuit
ON/OFF2
VOUT2
VOUT1
*1. Parasitic diode
Figure
3
4. S-1721 Series D type
*1
Function
ON/OFF logic
Status
Active “L”
Active “L”
Available
Available
None
ON/OFF1
1ch
2ch
1ch
2ch
1ch
2ch
Overcurrent
protector
Pull-up resistor
ON/OFF
circuit
+
−
Pull-down resistor
None
Reference
voltage circuit
*1
VIN
VSS
Overcurrent
protector
ON/OFF
circuit
+
−
Reference
voltage circuit
ON/OFF2
VOUT2
*1. Parasitic diode
Figure
4
Seiko Instruments Inc.
3
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.1.1_00
S-1721 Series
5. S-1721 Series E type
*1
Function
ON/OFF logic
Status
Active “H”
Active “H”
None
None
None
ON/OFF1
VOUT1
1ch
2ch
1ch
2ch
1ch
2ch
Overcurrent
protector
Pull-up resistor
ON/OFF
circuit
+
−
Pull-down resistor
None
Reference
voltage circuit
*1
VIN
VSS
Overcurrent
protector
ON/OFF
circuit
+
−
Reference
voltage circuit
ON/OFF2
VOUT2
*1. Parasitic diode
Figure
5
6. S-1721 Series F type
*1
Function
ON/OFF logic
Status
Active “H”
Active “L”
None
None
None
ON/OFF1
VOUT1
1ch
2ch
1ch
2ch
1ch
2ch
Overcurrent
protector
Pull-up resistor
Pull-down resistor
ON/OFF
circuit
+
−
None
Reference
voltage circuit
*1
VIN
VSS
Overcurrent
protector
ON/OFF
circuit
+
−
Reference
voltage circuit
ON/OFF2
VOUT2
*1. Parasitic diode
Figure
6
4
Seiko Instruments Inc.
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOSSVO-L1T7AG2E1RESGUeLrAiTeOsR
Rev.1.1_00
7. S-1721 Series G type
*1
Function
ON/OFF logic
Status
Active “L”
Active “H”
None
None
None
ON/OFF1
VOUT1
1ch
2ch
1ch
2ch
1ch
2ch
Overcurrent
protector
Pull-up resistor
ON/OFF
circuit
+
−
Pull-down resistor
None
Reference
voltage circuit
*1
VIN
VSS
Overcurrent
protector
ON/OFF
circuit
+
−
Reference
voltage circuit
ON/OFF2
VOUT2
VOUT1
*1. Parasitic diode
Figure
7
8. S-1721 Series H type
*1
Function
ON/OFF logic
Status
Active “L”
Active “L”
None
None
None
ON/OFF1
1ch
2ch
1ch
2ch
1ch
2ch
Overcurrent
protector
Pull-up resistor
Pull-down resistor
ON/OFF
circuit
+
−
None
Reference
voltage circuit
*1
VIN
VSS
Overcurrent
protector
ON/OFF
circuit
+
−
Reference
voltage circuit
ON/OFF2
VOUT2
*1. Parasitic diode
Figure
8
Seiko Instruments Inc.
5
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.1.1_00
S-1721 Series
Product Name Structure
Users can select the product type, output voltage, and package type for the S-1721 Series. Refer to “1. Product
name” regarding the contents of product name, “2. Function list of product type” regarding the product type.
1. Product name
1. 1 SNT-6A
S-1721
x
xx
xx
I6T1
G
−
Package abbreviation and IC packing
specifications*1
I6T1: SNT-6A, tape product
Output voltage of voltage regulator 2*3
12 to 50
(e.g., when the output voltage is 1.5 V, it is
expressed as 15.)
Output voltage of voltage regulator 1*3
12 to 50
(e.g., when the output voltage is 1.5 V, it is
expressed as 15.)
Product type*2
A to H
*1. Refer to the taping specifications.
*2. Refer to “2. Function list of product type”.
*3. If you request the product which has 0.05 V step, contact our sales office.
1. 2 SOT-23-6
S-1721
x
xx
xx
M6T1
G
−
Package abbreviation and IC packing
specifications*1
M6T1: SOT-23-6, tape product
Output voltage of voltage regulator 2*3
12 to 50
(e.g., when the output voltage is 1.5 V, it is
expressed as 15.)
Output voltage of voltage regulator 1*3
12 to 50
(e.g., when the output voltage is 1.5 V, it is
expressed as 15.)
Product type*2
A to H
*1. Refer to the taping specifications.
*2. Refer to “2. Function list of product type”.
*3. If you request the product which has 0.05 V step, contact our sales office.
6
Seiko Instruments Inc.
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOSSVO-L1T7AG2E1RESGUeLrAiTeOsR
Rev.1.1_00
2. Function list of product type
Table
1
Product Type
ON/OFF Logic
1ch Active “H”
2ch Active “H”
Pull-up Resistor
Pull-down Resistor
1ch None
2ch None
1ch Available
A type
B type
C type
D type
E type
F type
G type
H type
2ch Available
1ch Active “H”
2ch Active “L”
1ch Active “L”
2ch Active “H”
1ch Active “L”
2ch Active “L”
1ch Active “H”
2ch Active “H”
1ch Active “H”
2ch Active “L”
1ch Active “L”
2ch Active “H”
1ch Active “L”
2ch Active “L”
1ch None
1ch Available
2ch None
2ch Available
1ch Available
2ch None
1ch None
2ch Available
1ch Available
2ch Available
1ch None
2ch None
1ch None
2ch None
1ch None
2ch None
1ch None
2ch None
1ch None
2ch None
1ch None
2ch None
1ch None
2ch None
1ch None
2ch None
1ch None
2ch None
Seiko Instruments Inc.
7
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.1.1_00
S-1721 Series
3. Product name list
3.1 S-1721 series A type
ON/OFF logic :
Pull-up resistor :
Pull-down resistor :
1ch : Active “H”, 2ch : Active “H”
1ch : None, 2ch : None
1ch : Available, 2ch : Available
Table
2
Voltage Regulator 1
Output Voltage
Voltage Regulator 2
Output Voltage
SNT-6A
SOT-23-6
1.2 V 15 mV
1.2 V 15 mV
2.0 V 1%
1.2 V 15 mV
1.5 V 1%
2.0 V 1%
2.8 V 1%
S-1721A1212-I6T1G
S-1721A1215-I6T1G
S-1721A2020-I6T1G
S-1721A2828-I6T1G
S-1721A1212-M6T1G
S-1721A1215-M6T1G
S-1721A2020-M6T1G
S-1721A2828-M6T1G
2.8 V 1%
3.2 S-1721 series E type
ON/OFF logic :
Pull-up resistor :
Pull-down resistor :
1ch : Active “H”, 2ch : Active “H”
1ch : None, 2ch : None
1ch : None, 2ch : None
Table
3
Voltage Regulator 1
Output Voltage
Voltage Regulator 2
Output Voltage
SNT-6A
SOT-23-6
1.8 V 1%
2.8 V 1%
2.8 V 1%
2.85 V 1%
2.8 V 1%
1.8 V 1%
3.3 V 1%
2.5 V 1%
S-1721E1828-I6T1G
S-1721E2818-I6T1G
S-1721E2833-I6T1G
S-1721E2J25-I6T1G
S-1721E1828-M6T1G
S-1721E2818-M6T1G
S-1721E2833-M6T1G
S-1721E2J25-M6T1G
8
Seiko Instruments Inc.
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOSSVO-L1T7AG2E1RESGUeLrAiTeOsR
Rev.1.1_00
Pin Configurations
Table
Symbol
ON/OFF2
VIN
ON/OFF1
VSS
VOUT1
VOUT2
4
SNT-6A
Top view
Pin No.
Description
1
2
3
4
5
6
ON/OFF pin 2
Input voltage pin
ON/OFF pin 1
GND pin
Output voltage pin 1
Output voltage pin 2
1
2
3
6
5
4
Figure 9
Table
5
SOT-23-6
Top view
Pin No.
Symbol
ON/OFF1
VIN
Description
1
2
3
4
5
6
ON/OFF pin 1
Input voltage pin
ON/OFF pin 2
Output voltage pin 2
GND pin
6
5
4
ON/OFF2
VOUT2
VSS
VOUT1
Output voltage pin 1
1
2
3
Figure 10
Seiko Instruments Inc.
9
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.1.1_00
S-1721 Series
Absolute Maximum Ratings
Table
6
(Ta = 25°C unless otherwise specified)
Item
Input voltage
Symbol
VIN
VON/OFF1, 2
VOUT1, 2
Absolute Maximum Rating
SS − 0.3 to VSS + 7.0
Unit
V
V
V
V
V
SS − 0.3 to VIN + 0.3
SS − 0.3 to VIN + 0.3
400*1
Output voltage
V
SNT-6A
SOT-23-6
mW
mW
°C
°C
Power dissipation
PD
650*1
Operating ambient temperature
Storage temperature
Topr
Tstg
−40 to +85
−40 to +125
*1. When mounted on board
[Mounted board]
(1) Board size :
114.3 mm × 76.2 mm × t1.6 mm
(2) Board name : 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.
When mounted on board
700
600
500
SOT-23-6
400
300
200
SNT-6A
100
0
0
50
100
150
Ambient Temperature (Ta) (°C)
Figure 11 Power Dissipation of Package
10
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SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOSSVO-L1T7AG2E1RESGUeLrAiTeOsR
Rev.1.1_00
Electrical Characteristics
Table
7
Voltage regulator 1 and voltage regulator 2 (per circuit)
(Ta = 25°C unless otherwise specified)
Test
Circuit
Item
Symbol
Conditions
Min.
Typ.
Max.
Unit
VOUT(S)
VOUT(S)
+ 0.015
VOUT(S)
1.2 V
≤
≤
VOUT(S) < 1.5 V
VOUT(S)
VOUT(S)
V
2, 3
V
IN = VOUT(S)
+ 1.0 V,
−
0.015
Output voltage*1
Output current*2
VOUT(E)
IOUT = 30 mA
VOUT(S)
1.5 V
VOUT(S)
≤
5.0 V
V
2, 3
×
0.99
×
1.01
IOUT
VIN
≥
VOUT(S)
+
1.0 V
150*5
0.50
0.40
0.30
mA
V
V
V
V
V
V
V
4, 5
2, 3
2, 3
2, 3
2, 3
2, 3
2, 3
2, 3
1.2 V
1.3 V
1.4 V
1.5 V
1.7 V
2.0 V
2.8 V
≤
≤
≤
≤
≤
≤
≤
VOUT(S) < 1.3 V
VOUT(S) < 1.4 V
VOUT(S) < 1.5 V
VOUT(S) < 1.7 V
VOUT(S) < 2.0 V
VOUT(S) < 2.8 V
0.54
0.44
0.34
0.26
0.20
0.16
0.13
0.58
0.48
0.39
0.39
0.35
0.24
0.23
Dropout voltage*3
Vdrop
IOUT = 100 mA
VOUT(S)
≤
5.0 V
∆VOUT1
Line regulation
VOUT(S)
+
0.5 V
≤
VIN
1.0 V, 100
1.0 V, IOUT = 30 mA,
+85
1.0 V, ON/OFF pin = ON, no load
VOUT(S) < 1.5 V
VIN = VOUT(S) 1.0 V, ON/OFF pin = ON, no load
1.5 V VOUT(S) < 1.8 V
VIN = VOUT(S) 1.0 V, ON/OFF pin = ON, no load
1.8 V VOUT(S) 5.0 V
≤
6.5 V, IOUT = 30 mA
0.05
20
0.2
40
%/V
mV
2, 3
2, 3
∆VIN•VOUT
VOUT2
∆VOUT
∆Ta•VOUT
Load regulation
∆
VIN = VOUT(S)
VIN = VOUT(S)
+
+
µA
≤
IOUT 100 mA
≤
Output voltage
120
45
45
45
ppm/
°
C
2, 3
temperature coefficient*4
−
40
VIN = VOUT(S)
1.2 V
°
C
≤
Ta
≤
+
°C
35
µ
µ
µ
µ
A
1
≤
Current consumption
during operation
(per circuit)
+
ISS1
32
A
A
A
1
≤
+
25
1
≤
≤
Current consumption
during shutdown
Input voltage
ON/OFF pin
input voltage “H”
ON/OFF pin
input voltage “L”
ON/OFF pin
input current “H”
ON/OFF pin
input current “L”
ISS2
VIN
VIN = VOUT(S)
+
1.0 V, ON/OFF pin = OFF, no load
0.1
1.0
6.5
1
1
1.7
1.2
V
6, 7
VSH
VIN = VOUT(S)
VIN = VOUT(S)
+
+
1.0 V, RL = 1.0 k
1.0 V, RL = 1.0 k
Ω
Ω
V
6, 7
6, 7
6, 7
VSL
ISH
ISL
0.3
V
V
V
V
IN = 6.5 V,
ON/OFF = 6.5 V
IN = 6.5 V,
B (2ch)/C (1ch)/D/E/F/G/H type
A/B (1ch)/C (2ch) type
A/B (1ch)/C (2ch)/E/F/G/H type
B (2ch)/C (1ch)/D type
−
0.1
2.5
0.1
4.2
0.1
4.2
µ
A
A
A
A
1.0
µ
µ
µ
−
0.1
VON/OFF = 0 V
1.0
2.5
VIN = VOUT(S)
f = 1.0 kHz,
Vrip = 0.5 Vrms,
IOUT = 30 mA
VIN = VOUT(S)
+
1.0 V,
1.2 V
≤
VOUT(S) < 1.8 V
8, 9
8, 9
8, 9
80
75
70
dB
dB
dB
RR
Ripple rejection
1.8 V
3.1 V
≤
≤
VOUT(S) < 3.1 V
∆
VOUT(S)
≤ 5.0 V
4, 5
6, 7
Short-circuit current
Ishort
RPD
+
1.0 V, ON/OFF pin = ON, VOUT = 0 V
150
2.6
mA
Shutdown pull-up/pull-
down resistor
1.5
6.5
MΩ
Seiko Instruments Inc.
11
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.1.1_00
S-1721 Series
*1. VOUT(S): Specified output voltage
VOUT(E): Actual output voltage at the fixed load
Output voltage when fixing IOUT(= 30 mA) and inputting VOUT(S) +1.0 V
*2. The output current at which the output voltage becomes 95% of VOUT(E) after gradually increasing the output current.
*3. Vdrop = VIN1 − (VOUT3 × 0.98)
VOUT3 is the output voltage when VIN = VOUT(S) + 1.0 V and IOUT = 100 mA.
V
IN1 is the input voltage at which the output voltage becomes 98% of VOUT3 after gradually decreasing the input voltage.
*4. The change in temperature [mV/°C] is calculated using the following equation.
∆VOUT
∆Ta
∆VOUT
*2
[
mV/°C *1
]
= VOUT(S)
[
V
]
×
[
ppm/°C *3
÷1000
]
∆Ta • VOUT
*1. Change in temperature of the output voltage
*2. Specified output voltage
*3. Output voltage temperature coefficient
*5. The output current can be at least this value.
Due to restrictions on the package power dissipation, this value may not be satisfied. Attention should be paid to the power
dissipation of the package when the output current is large.
This specification is guaranteed by design.
12
Seiko Instruments Inc.
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOSSVO-L1T7AG2E1RESGUeLrAiTeOsR
Rev.1.1_00
Test Circuit
+
1.
A
VIN
VOUT2 VOUT1
ON/OFF2
ON/OFF1
VSS
*1
*1
*1. Set to VIN or GND
Figure 12
2.
3.
4.
+
VIN
A
VOUT2
ON/OFF2
VOUT1
+
ON/OFF1
VSS
V
*1
*2
*1. Set to power-off
*2. Set to power-on
Figure 13
VIN
+
A
VOUT2
ON/OFF2
VOUT1
+
ON/OFF1
VSS
V
*1
*2
*1. Set to power-on
*2. Set to power-off
Figure 14
VIN
A
VOUT2
ON/OFF2
VOUT1
+
ON/OFF1
VSS
V
*1
*2
*1. Set to power-off
*2. Set to VIN or GND
Figure 15
5.
VIN
A
VOUT2
ON/OFF2
VOUT1
+
V
ON/OFF1
VSS
*1
*2
*1. Set to VIN or GND
*2. Set to power-off
Figure 16
Seiko Instruments Inc.
13
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.1.1_00
S-1721 Series
6.
VIN
VOUT2
VOUT1
ON/OFF1
+
+
V
A
ON/OFF2
RL
*1
VSS
*1. Set to power-off
Figure 17
7.
VIN
VOUT2
ON/OFF2
VOUT1
+
+
A
ON/OFF1
VSS
RL
V
*1
*1. Set to power-off
Figure 18
8.
9.
VIN
VOUT2
ON/OFF2
VOUT1
+
V
ON/OFF1
VSS
RL
*1
*2
*1. Set to power-off
*2. Set to power-on
Figure 19
VIN
VOUT2
ON/OFF2
VOUT1
+
ON/OFF1
VSS
RL
V
*1
*2
*1. Set to power-on
*2. Set to power-off
Figure 20
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SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOSSVO-L1T7AG2E1RESGUeLrAiTeOsR
Rev.1.1_00
Standard Circuit
INPUT
OUTPUT 1
OUTPUT 2
VOUT1
VOUT2
VIN
ON/OFF1
ON/OFF2
CIN
CL1
VSS
CL2
Single GND
GND
*1. CIN is a capacitor for stabilizing the input.
*2. A ceramic capacitor of 1.0 µF or more can be used for CL1 and CL2.
Figure 21
Caution The above connection diagram and constant will not guarantee successful operation. Perform
thorough evaluation using the actual application to set the constant.
Condition of Application
Input capacitor (CIN) :
Output capacitor (CL1, CL2) :
1.0 µF or more
1.0 µF or more (ceramic capacitor)
Caution A general series regulator may oscillate, depending on the external components. Confirm that no
oscillation occurs in the application for which the above capacitors are used.
Selection of Input and Output Capacitors (CIN, CL1, CL2)
The S-1721 Series requires an output capacitor between the VOUT and VSS pin for phase compensation. Operation is
stabilized by a ceramic capacitor with an output capacitance of 1.0 µF or more over the entire temperature range.
When using an OS capacitor, tantalum capacitor, or aluminum electrolytic capacitor, the capacitance must be 1.0 µF or
more.
The value of the output overshoot or undershoot transient response varies depending on the value of the output
capacitor. The required capacitance of the input capacitor differs depending on the application.
The recommended capacitance for an application is CIN ≥ 1.0 µF, CL1 ≥ 1.0 µF, CL2 ≥ 1.0 µF; however, when selecting
the output capacitor, perform sufficient evaluation, including evaluation of temperature characteristics, on the actual
device.
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SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.1.1_00
S-1721 Series
Explanation of Terms
1. Low dropout voltage regulator
This IC’s voltage regulator has the low dropout voltage due to its built-in low on-resistance transistor.
2. Output voltage (VOUT
)
The accuracy of the output voltage is ensured at 1.0% under the specified conditions of fixed input voltage*1, fixed
output current, and fixed temperature.
*1. Differs depending on the product.
Caution If the above conditions change, the output voltage value may vary and exceed the accuracy
range of the output voltage. See “ Electrical Characteristics” and “ Characteristics (Typical
Data) (Per Circuit)” for details.
∆VOUT1
3. Line regulation
∆VIN •VOUT
Indicates the dependency of the output voltage on the input voltage. That is, the values show how much the output
voltage changes due to a change in the input voltage with the output current remaining unchanged.
4. Load regulation (∆VOUT2
)
Indicates the dependency of the output voltage on the output current. That is, the values show how much the output
voltage changes due to a change in the output current with the input voltage remaining unchanged.
5. Dropout voltage (Vdrop
)
Indicates the difference between input voltage VIN and the output voltage when; decreasing input voltage VIN
gradually until the output voltage has dropped out to the value of 98% of output voltage VOUT3, which is at VIN
VOUT(S) + 1.0 V.
=
Vdrop = VIN1 − (VOUT3 × 0.98)
16
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SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOSSVO-L1T7AG2E1RESGUeLrAiTeOsR
Rev.1.1_00
∆VOUT
∆Ta •VOUT
6. Temperature coefficient of output voltage
The shaded area in Figure 22 is the range where VOUT varies in the operating temperature range when the
temperature coefficient of the output voltage is 120 ppm/°C.
Example of VOUT = 3.0 V Typ. products
VOUT
[V]
+0.36 mV/°C
*1
VOUT(E)
−0.36 mV/°C
−40
25
Ta [°C]
85
*1.
V
OUT(E) is the value of the output voltage measured at 25°C.
Figure 22
A change in the temperature of the output voltage [mV/°C] is calculated using the following equation.
∆VOUT
∆Ta
∆VOUT
∆Ta • VOUT
*2
[
mV/°C *1
]
= VOUT(S)
[
V
]
×
[
ppm/°C *3
÷1000
]
*1. Change in temperature of output voltage
*2. Specified output voltage
*3. Output voltage temperature coefficient
Seiko Instruments Inc.
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SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.1.1_00
S-1721 Series
Operation
1. Basic operation
Figure 23 shows the block diagram of S-1721 Series.
The error amplifier compares the reference voltage (Vref) with Vfb, which is the output voltage resistance-divided by
feedback resistors Rs and Rf. It supplies the gate voltage necessary to maintain the constant output voltage which is
not influenced by the input voltage and temperature change, to the output transistor.
VIN
*1
Current
supply
Error
amplifier
VOUT
−
+
Vref
Rf
Vfb
Reference voltage
circuit
Rs
VSS
*1. Parasitic diode
Figure 23
2. Output transistor
In the S-1721 Series, a low on-resistance P-channel MOS FET is used as the output transistor.
Be sure that VOUT does not exceed VIN + 0.3 V to prevent the voltage regulator from being damaged due to inverse
current flowing from the VOUT pin through a parasitic diode to the VIN pin.
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Rev.1.1_00
3. ON/OFF pin 1 and 2
These pins start and stop the regulator.
When the ON/OFF pin is set to the power-off level, the entire internal circuit stops operating, and the built-in P-
channel MOS FET output transistor between the VIN and VOUT pin is turned off, in order to reduce the current
consumption significantly. The VOUT pin is set to the VSS level by the internal dividing resistor of several hundred
kΩ which is placed between the VOUT and VSS pin. Note that the current consumption increases when a voltage of
0.3 V to 1.2 V (@Ta = 25°C) is applied to the ON/OFF pin.
The ON/OFF pin is configured as shown in Figures 24 and 25. In the S-1721 Series A, B C, and D types, the
ON/OFF pin is internally pulled up to VIN or pulled down to VSS when in the floating status, so the VOUT pin is set
to the VSS level.
In the S-1721 Series E, F, G and H types, do not use S-1721 Series in the floating status because the ON/OFF pin
is not internally pulled up or pulled down.
When not using the ON/OFF pin in the S-1721 Series E, F, G, and H types, connect the ON/OFF pin to the VIN pin
in the E, F (1ch only), and G (2ch only) types. In the F (2ch only), G (1ch only) and H types, connect the ON/OFF pin
to the VSS pin.
Table
8
Internal
Current
Logic Type
ON/OFF Pin
VOUT Pin Voltage
Circuits
Consumption
1ch “H”: Power on
2ch “H”: Power on
1ch “H”: Power on
2ch “L”: Power on
1ch “L”: Power on
2ch “H”: Power on
1ch “L”: Power on
2ch “L”: Power on
1ch “L”: Power off
2ch “L”: Power off
1ch “L”: Power off
2ch “H”: Power off
1ch “H”: Power off
2ch “L”: Power off
1ch “H”: Power off
2ch “H”: Power off
Operate
Operate
Operate
Operate
Operate
Operate
Operate
Operate
Stop
Set value
Set value
Set value
Set value
Set value
Set value
Set value
Set value
ISS1
ISS1
ISS1
ISS1
ISS1
ISS1
ISS1
ISS1
ISS2
ISS2
ISS2
ISS2
ISS2
ISS2
ISS2
ISS2
A
B
C
D
E
F
V
SS level
VSS level
SS level
VSS level
SS level
VSS level
SS level
VSS level
Stop
Stop
Stop
Stop
Stop
Stop
Stop
V
V
G
H
V
(1) S-1721 Series A, B, C, D Types
(2) S-1721 Series E, F, G, H Types
VIN
VIN
B (2ch), C (1ch), D types
ON/OFF
ON/OFF
A, B (1ch), C (2ch) type
VSS
VSS
Figure 24
Figure 25
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SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.1.1_00
S-1721 Series
4. Overcurrent protector
The S-1721 Series has a built-in overcurrent protector having the characteristics shown in (1) Output Voltage vs.
Output Current (Ta = 25°C) in “ Characteristics (Typical Data) (Per Circuit)” to protect the output transistor
against an excessive output current and short circuiting between the VOUT and VSS pin.
The current (Ishort) when the output pin is short-circuited is internally set at approximately 150 mA (Typ.), and the
initial value is restored for the output voltage, if releasing a short circuit once.
Note that the overcurrent protect circuit does not provide a thermal protection function, therefore pay attention to the
conditions of input voltage and load current so that the IC’s loss under the usage conditions, including the short
circuit conditions, does not exceed the package power dissipation if the condition in which a short circuiting
continues for a long time.
5. Pull-down/pull-up resistor (S-1721 Series A, B, C, and D types)
In the S-1721 Series A, B, C, and D types, the ON/OFF pin is internally pulled up to VIN or pulled down to VSS, so
the VOUT pin is in the VSS level when in the floating status.
In A/B (1ch only) and C (2ch only), the ON/OFF pin is connected to VIN,
In B (2ch only)/C (1ch only)/D type, the ON/OFF pin is connected to VSS;
Note that during operation in these cases, the current consumption of the IC is generated as much as the current
which flows into a pull-up resistor of 2.6 MΩ or a pull-down resistor of 2.6 MΩ.
20
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Rev.1.1_00
Precautions
•
Wiring patterns for the VIN, VOUT and GND pins should be designed so that the impedance is low. When mounting
an output capacitor between the VOUT and VSS pin (CL1, CL2) and a capacitor for stabilizing the input between VIN
and VSS pin (CIN), the distance from the capacitors to these pins should be as short as possible.
Note that the output voltage may increase when a series regulator is used at low load current (1.0 mA or less).
Note that the output voltage may increase due to the leakage current from a driver when a series regulator is used
at high temperature.
•
•
•
Generally a series regulator may cause oscillation, depending on the selection of external parts. The following
conditions are recommended for this IC. However, be sure to perform sufficient evaluation under the actual usage
conditions for selection, including evaluation of temperature characteristics. See “(5) Example of Equivalent Series
Resistance vs. Output Current Characteristics (Ta = 25°C)” in “ Reference Data (Per Circuit)” for the
equivalent series resistance (RESR) of the output capacitor.
Input capacitor (CIN) :
Output capacitor (CL1, CL2) :
1.0 µF or more
1.0 µF or more
•
•
The voltage regulator may oscillate when the impedance of the power supply is high and the input capacitor is small
or an input capacitor is not connected. Note that, if the capacitance of the output capacitor is greater than that of the
input capacitor, the voltage regulator may oscillate.
Note that an oscillation may occur when the load current is high (100 mA or higher) and the difference between the
voltage input and output is around the dropout voltage if the inductance of the power supply is high. Perform
sufficient evaluation including electrical characteristics under the actual use conditions to select an input capacitor.
Concerning the fluctuation of output voltage due to power-supplying and load, confirm with the actual device.
If the power supply suddenly increases, a momentary overshoot may be output. It is therefore important to
sufficiently evaluate the output voltage at power application in the actual equipment.
The application conditions for the input voltage, output voltage, and load current should not exceed the package
power dissipation.
Do not apply an electrostatic discharge to this IC that exceeds the performance ratings of the built-in electrostatic
protection circuit.
In determining the output current, attention should be paid to the output current value specified in Table 7 in “
Electrical Characteristics” and footnote *5 of the table.
SII claims no responsibility for any disputes arising out of or in connection with any infringement by products
including this IC of patents owned by a third party.
•
•
•
•
•
•
Seiko Instruments Inc.
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SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.1.1_00
S-1721 Series
Characteristics (Typical Data) (Per Circuit)
(1) Output Voltage vs. Output Current (When Load Current Increases) (Ta = 25°C)
VOUT = 1.2 V
VOUT = 3.0 V
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
V
IN = 3.3 V
3.5 V
V
IN = 1.5 V
1.7 V
4.0 V
2.2 V
5.0 V
6.5 V
3.2 V
6.5 V
0
100
200
300
400
0
100
200
300
400
IOUT [mA]
IOUT [mA]
VOUT = 5.0 V
6
5
4
3
2
1
0
Remark In determining the output current, attention should
be paid to the following.
V
IN = 5.3 V
5.5 V
6.0 V
6.5 V
1. The minimum output current value and
footnote *5 in Table 7 in the “ Electrical
Characteristics”
2. The package power dissipation
0
100
200
300
400
IOUT [mA]
(2) Output Voltage vs. Input Voltage (Ta = 25°C)
VOUT = 1.2 V
VOUT = 3.0 V
1.30
3.1
3.0
2.9
1.25
1.20
IOUT = 1 mA
2.8
1.15
IOUT = 1 mA
IOUT = 30 mA
IOUT = 50 mA
IOUT = 30 mA
IOUT = 50 mA
2.6
2.7
1.10
1.05
1.00
2.5
1.0
1.5
2.0
2.5
3.0
3.5
2.5
3.0
3.5
4.0
4.5
5.0
VIN [V]
VIN [V]
VOUT = 5.0 V
5.2
5.1
5.0
4.9
4.8
4.7
4.6
4.5
I
I
I
OUT = 1 mA
OUT = 30 mA
OUT = 50 mA
4.5
5.0
5.5
6.0
6.5
VIN [V]
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SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOSSVO-L1T7AG2E1RESGUeLrAiTeOsR
Rev.1.1_00
(3) Dropout Voltage vs. Output Current
VOUT = 1.2 V
VOUT = 3.0 V
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0
85°C
25°C
−40°C
0.30
85°C
25°C
−40°C
0.25
0.20
0.15
0.10
0.05
0
0
50
100
150
200
0
50
100
150
200
IOUT [mA]
IOUT [mA]
VOUT = 5.0 V
0.25
0.20
0.15
0.10
0.05
0
85°C
25°C
−40°C
0
50
100
150
200
IOUT [mA]
(4) Dropout Voltage vs. Set Output Voltage
0.40
150 mA
100 mA
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0
50 mA
30 mA
10 mA
0
1
2
3
4
5
6
VOTA [V]
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SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.1.1_00
S-1721 Series
(5) Output Voltage vs. Ambient Temperature
VOUT = 1.2 V
VOUT = 3.0 V
3.20
1.30
3.15
3.10
3.05
3.00
2.95
2.90
2.85
2.80
1.25
1.20
1.15
1.10
−40 −25
0
25
50
75 85
−40 −25
0
25
50
75 85
Ta [°C]
Ta [°C]
VOUT = 5.0 V
5.3
5.2
5.1
5.0
4.9
4.8
4.7
−40 −25
0
25
50
75 85
Ta [°C]
(6) Current Consumption vs. Input Voltage
VOUT = 1.2 V
VOUT = 3.0 V
40
35
30
25
40
35
30
25
20
15
10
5
85°C
25°C
20
15
10
5
85°C
25°C
−40°C
−40°C
0
0
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
VIN [V]
VIN [V]
VOUT = 5.0 V
40
35
30
25
20
15
10
5
85°C
25°C
−40°C
0
0
1
2
3
4
5
6
7
VIN [V]
24
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SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOSSVO-L1T7AG2E1RESGUeLrAiTeOsR
Rev.1.1_00
(7) Ripple Rejection (Ta = 25°C)
VOUT = 1.2 V
VOUT = 3.0 V
VIN = 2.2 V, COUT = 1.0 µF
VIN = 4.0 V, COUT = 1.0 µF
120
100
80
60
40
20
0
120
100
80
60
40
20
0
I
I
I
OUT = 1 mA
OUT = 30 mA
OUT = 100 mA
I
I
I
OUT = 1 mA
OUT = 30 mA
OUT = 100 mA
10
100
1K
10K 100K
1M
10
100
1K
10K 100K
1M
Frequency [Hz]
Frequency [Hz]
VOUT = 5.0 V
VIN = 6.0 V, COUT = 1.0 µF
120
100
80
60
40
20
0
I
I
OUT = 1 mA
OUT = 30 mA
IOUT = 100 mA
10
100
1K
10K 100K
1M
Frequency [Hz]
Seiko Instruments Inc.
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SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.1.1_00
S-1721 Series
Reference Data (Per Circuit)
(1) Transient Response Characteristics when Input (Ta = 25°C) Common to VR1 and VR2
VOUT = 1.2 V
VOUT = 3.0 V
IOUT = 30 mA, tr = tf = 5.0 µs, COUT = 1.0 µF, CIN = 1.0 µF
IOUT = 30 mA, tr = tf = 5.0 µs, COUT = 1.0 µF, CIN = 1.0 µF
4.0
1.30
1.28
1.26
1.24
1.22
1.20
1.18
1.16
1.14
3.10
3.08
3.06
3.04
3.02
3.00
2.98
2.96
7.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
6.0
5.0
4.0
3.0
2.0
1.0
0
V
IN
V
IN
V
OUT
V
OUT
−100 −50
0
50 100 150 200 250 300 350
−100 −50
0
50 100 150 200 250 300 350
t [µs]
t [µs]
VOUT = 5.0 V
IOUT = 30 mA, tr = tf = 5.0 µs, COUT = 1.0 µF, CIN = 1.0 µF
5.04
5.03
5.02
5.01
5.00
4.99
4.98
4.97
7.0
6.5
6.0
5.5
5.0
4.5
4.0
3.5
V
IN
V
OUT
−100 −50
0
50 100 150 200 250 300 350
t [µs]
(2) Transient Response Characteristics of Load (Ta = 25°C)
VOUT = 1.2 V
VOUT = 1.2 V
VIN = 2.2 V, COUT = 1.0 µF, CIN = 1.0 µF, IOUT = 10 ↔ 50 mA
VIN = 2.2 V, COUT = 1.0 µF, CIN = 1.0 µF, IOUT = 10 ↔ 100 mA
1.46
1.42
1.38
1.34
1.30
1.26
1.22
1.18
1.14
1.10
100
75
1.42
1.38
1.34
1.30
1.26
1.22
1.18
1.14
1.10
1.06
200
150
100
50
50
25
I
OUT
I
OUT
OUT
0
0
V
V
OUT
−25
−50
−100
−125
−150
−50
−100
−150
−200
−250
−100 −50
0
50 100 150 200 250 300 350
−100 −50
0
50 100 150 200 250 300 350
t [µs]
t [µs]
VOUT = 3.0 V
V
OUT = 3.0 V
VIN = 4.0 V, COUT = 1.0 µF, CIN = 1.0 µF, IOUT = 10 ↔ 50 mA VIN = 4.0 V, COUT = 1.0 µF, CIN = 1.0 µF, IOUT = 10 ↔ 100 mA
3.25
3.20
3.15
3.10
3.05
3.00
2.95
2.90
2.85
2.80
100
75
3.25
3.20
3.15
3.10
3.05
3.00
2.95
2.90
2.85
2.80
200
150
100
50
50
25
I
OUT
I
OUT
0
0
−25
−50
−75
−100
−125
−50
−100
−150
−200
−250
V
OUT
V
OUT
−100 −50
0
50 100 150 200 250 300 350
−100 −50
0
50 100 150 200 250 300 350
t [µs]
t [µs]
26
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SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOSSVO-L1T7AG2E1RESGUeLrAiTeOsR
Rev.1.1_00
VOUT = 5.0 V
VOUT = 5.0 V
VIN = 6.0 V, COUT = 1.0 µF, CIN = 1.0 µF, IOUT = 10 ↔ 50 mA VIN = 6.0 V, COUT = 1.0 µF, CIN = 1.0 µF, IOUT = 10 ↔ 100 mA
5.50
5.40
5.30
5.20
5.10
5.00
4.90
4.80
4.70
4.60
100
75
5.50
5.40
5.30
5.20
5.10
5.00
4.90
4.80
4.70
4.60
200
150
100
50
50
25
I
OUT
I
OUT
0
0
−25
−50
−75
−100
−125
−50
−100
−150
−200
−250
V
OUT
V
OUT
−100 −50
0
50 100 150 200 250 300 350
−100 −50
0
50 100 150 200 250 300 350
t [µs]
t [µs]
(3) Transient Response Characteristics of ON/OFF Pin (Ta = 25°C)
OUT = 1.2 V VOUT = 3.0 V
V
VIN = 2.2 V, tr = 5.0 µs, COUT = 1.0 µF, CIN = 1.0 µF, IOUT = 100 mA VIN = 4.0 V, tr = 5.0 µs, COUT = 1.0 µF, CIN = 1.0 µF, IOUT = 100 mA
2.4
2.0
1.6
1.2
0.8
0.4
0
4.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0
6.0
V
ON / OFF
V
ON / OFF
4.0
2.0
2.0
0
0
−2.0
−4.0
−6.0
−8.0
−2.0
−4.0
−6.0
−8.0
V
OUT
V
OUT
0
50
100
150
200
0
50
100
150
200
t [µs]
t [µs]
VOUT = 5.0 V
VIN = 6.0 V, tr = 5.0 µs, COUT = 1.0 µF, CIN = 1.0 µF, IOUT = 100 mA
10.0
9.0
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0
8.0
6.0
V
ON / OFF
4.0
2.0
0
−2.0
−4.0
−6.0
−8.0
−10.0
−12.0
V
OUT
0
50
100
150
200
t [µs]
Seiko Instruments Inc.
27
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.1.1_00
S-1721 Series
(4) Transient Response Characteristics of Load’s Mutual Interference (Ta = 25°C)
VOUT1 = VOUT2 = 1.2 V
VIN = 2.2 V, CL1 = CL2 = 1.0 µF, CIN = 1.0 µF,
IOUT1 = 10 ↔ 100 mA, IOUT2 = no load
VOUT1 = VOUT2 = 3.0 V
VIN = 4.0 V, CL1 = CL2 = 1.0 µF, CIN = 1.0 µF,
IOUT1 = 10 ↔ 100 mA, IOUT2 = no load
150
100
50
150
100
50
I
OUT1
I
OUT1
0
0
−50
−50
1.30
1.26
1.22
1.18
1.14
3.10
3.05
3.00
2.95
2.90
VOUT2
V
OUT2
1.26
1.22
1.18
1.14
1.10
1.06
3.05
3.00
2.95
2.90
2.85
2.80
V
OUT1
V
OUT1
−100 −50
0
50 100 150 200 250 300 350
−100 −50
0
50 100 150 200 250 300 350
t [µs]
t [µs]
VOUT1 = VOUT2 = 5.0 V
VIN = 6.0 V, CL1 = CL2 = 1.0 µF, CIN = 1.0 µF,
IOUT1 = 10 ↔ 100 mA, IOUT2 = no load
150
100
50
I
OUT1
0
−50
5.20
5.10
5.00
4.90
4.80
V
OUT2
5.10
5.00
4.90
4.80
4.70
4.60
VOUT1
−100 −50
0
50 100 150 200 250 300 350
t [µs]
(5) Example of Equivalent Series Resistance vs. Output Current Characteristics (Ta = 25°C)
CIN = CL = 1.0 µF
100
Stable
0.01
0
150
IOUT [mA]
28
Seiko Instruments Inc.
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOSSVO-L1T7AG2E1RESGUeLrAiTeOsR
Rev.1.1_00
Marking Specifications
(1) SNT-6A
SNT-6A
Top view
(1) to (3) : Product code (Refer to Product name vs. Product code)
(4) to (6) : Lot number
1
2
3
6
5
4
Product name vs. Product code
(a) S-1721 Series A type
Product code
Product Name
(1)
(2)
2
(3)
B
D
C
A
S-1721A1212-I6T1G
S-1721A1215-I6T1G
S-1721A2020-I6T1G
S-1721A2828-I6T1G
S
S
S
S
2
2
2
Remark Please contact our sales office for products with specifications other than the above.
(b) S-1721 Series E type
Product code
Product Name
(1)
S
S
S
S
(2)
5
(3)
D
S-1721E1828-I6T1G
S-1721E2818-I6T1G
S-1721E2833-I6T1G
S-1721E2J25-I6T1G
5
5
G
H
5
K
Remark Please contact our sales office for products with specifications other than the above.
Seiko Instruments Inc.
29
SUPER-SMALL PACKAGE 2-CIRCUIT HIGH RIPPLE-REJECTION LOW CURRENT CONSUMPTION LOW DROPOUT CMOS VOLTAGE REGULATOR
Rev.1.1_00
S-1721 Series
(2) SOT-23-6
SOT-23-6
Top view
(1) to (3) : Product code (Refer to Product name vs. Product code)
(4) : Lot number
6
5
4
(1) (2) (3) (4)
3
1
2
Product name vs. Product code
(a) S-1721 Series A type
Product code
Product Name
(1)
S
S
S
S
(2)
2
(3)
B
D
C
A
S-1721A1212-M6T1G
S-1721A1215-M6T1G
S-1721A2020-M6T1G
S-1721A2828-M6T1G
2
2
2
Remark Please contact our sales office for products with specifications other than the above.
(b) S-1721 Series E type
Product code
Product Name
(1)
S
S
S
S
(2)
5
(3)
D
S-1721E1828-M6T1G
S-1721E2818-M6T1G
S-1721E2833-M6T1G
S-1721E2J25-M6T1G
5
5
G
H
5
K
Remark Please contact our sales offices for products with specifications other than the above.
30
Seiko Instruments Inc.
1.57±0.03
6
5
4
+0.05
-0.02
0.08
1
2
3
0.5
0.48±0.02
0.2±0.05
No. PG006-A-P-SD-2.0
SNT-6A-A-PKG Dimensions
PG006-A-P-SD-2.0
TITLE
No.
SCALE
UNIT
mm
Seiko Instruments Inc.
+0.1
-0
ø1.5
4.0±0.1
2.0±0.05
0.25±0.05
+0.1
ø0.5
-0
4.0±0.1
0.65±0.05
1.85±0.05
5°
3
2
5
1
6
4
Feed direction
No. PG006-A-C-SD-1.0
TITLE
SNT-6A-A-Carrier Tape
PG006-A-C-SD-1.0
No.
SCALE
UNIT
mm
Seiko Instruments Inc.
12.5max.
9.0±0.3
Enlarged drawing in the central part
ø13±0.2
(60°)
(60°)
No. PG006-A-R-SD-1.0
SNT-6A-A-Reel
TITLE
No.
PG006-A-R-SD-1.0
SCALE
UNIT
QTY.
5,000
mm
Seiko Instruments Inc.
0.52
1.36
0.52
0.3
0.3
0.2
0.3
0.2
Caution Making the wire pattern under the package is possible. However, note that the package
may be upraised due to the thickness made by the silk screen printing and of a solder
resist on the pattern because this package does not have the standoff.
No. PG006-A-L-SD-3.0
SNT-6A-A-Land Recommendation
TITLE
No.
PG006-A-L-SD-3.0
SCALE
UNIT
mm
Seiko Instruments Inc.
2.9±0.2
1.9±0.2
6
5
4
+0.1
-0.05
1
3
2
0.15
0.95
0.95
0.35±0.15
No. MP006-A-P-SD-1.1
TITLE
SOT236-A-PKG Dimensions
MP006-A-P-SD-1.1
No.
SCALE
UNIT
mm
Seiko Instruments Inc.
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
6
5
Feed direction
No. MP006-A-C-SD-3.1
SOT236-A-Carrier Tape
MP006-A-C-SD-3.1
TITLE
No.
SCALE
UNIT
mm
Seiko Instruments Inc.
12.5max.
9.0±0.3
Enlarged drawing in the central part
ø13±0.2
(60°)
(60°)
No. MP006-A-R-SD-2.1
SOT236-A-Reel
MP006-A-R-SD-2.1
TITLE
No.
SCALE
UNIT
QTY
3,000
mm
Seiko Instruments Inc.
·
·
The information described herein is subject to change without notice.
Seiko Instruments Inc. is not responsible for any problems caused by circuits or diagrams described herein
whose related industrial properties, patents, or other rights belong to third parties. The application circuit
examples explain typical applications of the products, and do not guarantee the success of any specific
mass-production design.
·
·
·
When the products described herein are regulated products subject to the Wassenaar Arrangement or other
agreements, they may not be exported without authorization from the appropriate governmental authority.
Use of the information described herein for other purposes and/or reproduction or copying without the
express permission of Seiko Instruments Inc. is strictly prohibited.
The products described herein cannot be used as part of any device or equipment affecting the human
body, such as exercise equipment, medical equipment, security systems, gas equipment, or any apparatus
installed in airplanes and other vehicles, without prior written permission of Seiko Instruments Inc.
Although Seiko Instruments Inc. exerts the greatest possible effort to ensure high quality and reliability, the
failure or malfunction of semiconductor products may occur. The user of these products should therefore
give thorough consideration to safety design, including redundancy, fire-prevention measures, and
malfunction prevention, to prevent any accidents, fires, or community damage that may ensue.
·
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