SC603 [SEMTECH]
CHARGE PUMP REGULATOR WITH SELECTABLE 5.0V/4.5V OUTPUT; 具有可选择5.0V / 4.5V输出电荷泵稳压器
| 型号： | SC603 |
| 厂家： | 
SEMTECH CORPORATION |
| 描述： | CHARGE PUMP REGULATOR WITH SELECTABLE 5.0V/4.5V OUTPUT |
| 文件： | 总12页 (文件大小：793K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SC603
CHARGE PUMP REGULATOR WITH
SELECTABLE 5.0V/4.5V OUTPUT
POWER MANAGEMENT
Description
Features
Small size - MLP Micro 10 lead 3x3mm package
Selectable 5.0V or 4.5V output voltage
200mA available with 4.5V output
160mA available with 5.0V output
Short circuit protection
Soft Start function
Shutdown current <2µA
Selectable fixed frequencies of 262kHz & 650kHz
Low ripple
The SC603 is a versatile charge pump designed for use
in battery operated power supply applications. The wide
input range is matched for Li-Ion battery applications.
Only two tiny ceramic bucket capacitors are required, and
the inductorless implementation provides a reduced-EMI
solution. Low noise mode switching circuitry and con-
stant output current allow the use of extremely small
input and output capacitors.
Regulated to +/-5%
Ease of use
The SC603 charge pump regulator can be used for ap-
plications that require up to 200mA of output current
with a 4.5V output. The 5.0V output version provides up
to 160mA of output current.
Applications
Cellular phones
LED photo flash for cellular phones
LED backlighting
PDA power supplies
Portable electronics
Electronic books
Compared to a switch mode regulator, the SC603 offers
a solution with less cost, area, noise and complexity.
Wireless web appliances
Typical Application Circuit
U1
1
2
3
2.7V to 6.5V
VIN
VOUT
CF1+
4.5V or 5.0V
Cin
1.0uF
Cout
1.0uF
6
4
5
Cbucket1
1.0uF
EN
9
10
7
CF1-
CF2+
CF2-
UP TO 10 LEDS
FSEL
VSEL
Cbucket2
1.0uF
GND
8
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SC603
POWER MANAGEMENT
Absolute Maximum Ratings
Parameter
Symbol
VIN
Maximum
-0.3 to +7.0
-0.3 to +7.0
Indefinite
Units
Supply Voltage
V
V
Output Voltage
VOUT
VOUT Short Circuit Duration
SC
Thermal Resistance, Junction To
Ambient
(JESD51 Standard Method)
31
°C/W
θJA
Operating Ambient
TA
TJC
-40 to +85
-40 to +150
-65 to +150
°C
°C
°C
Junction Temperature Range
Storage Temperature Range
TSTG
Peak IR Reflow Temperature
SC603IMLTR
TLEAD
240
260
°C
°C
Peak IR Reflow Temperature
SC603IMLTRT
TLEAD
Electrical Characteristics
Unless specified: TA = -40°C to 85°C, C =C
= 1.0µF (ESR = 0.1Ω), C =1.0µF (ESR = 0.1Ω), V = 2.85V to 5.5V
OUT IN
IN
BUCKET
Parameter
Symbol
Conditions
MIN
TYP
MAX
6.5
1.4
2.8
2
Units
V
Input Supply Voltage
Quiescent Current
VIN
IQ
2.5
Freq. = 262kHz, IOUT = 0mA, VIN = 3.7V
Freq. =650kHz, IOUT = 0mA, VIN = 3.7V
Enable = 0
1.0
2.1
mA
mA
µA
V
Output Voltage
Output Current
VOUT
Static Load Regulation with
VSEL = 1
4.75
5.0
4.5
5.25
Static Load Regulation with
VSEL = 0
4.275
4.725
V
IOUT
VSEL = 1, 3.2V < VIN < 5.5V
150
160
mA
mA
VSEL = 1, 3.2V < VIN < 5.5V
TA = -40oC to 70oC
VSEL = 0, 3.2V < VIN < 5.5V
190
200
mA
mA
VSEL = 0, 3.2V < VIN < 5.5V
TA = -40oC to 70oC
VSEL=1, 2.85V < VIN < 5.5V
60
mA
mA
VSEL=0, 2.85V < VIN < 5.5V
2
120
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SC603
POWER MANAGEMENT
Unless specified: TA = -40°C to 85°C, C =C
= 1.0µF (ESR = 0.1Ω), C =1.0µF (ESR = 0.1Ω), V = 2.85V to 5.5V
OUT IN
IN
BUCKET
Parameter
Symbol
Conditions
MIN
-15%
-20%
TYP
262
650
MAX
Units
kHz
Pump Frequency
Enable = 1, FSEL= 0
Enable = 1, FSEL = 1
+15%
+20%
fPUMP
kHz
Frequency Mode Transition Time
Transition time from one frequency
mode to any other frequency mode
guaranteed by design
TCLOCK
1
Period
Short Circuit Current
Input High Threshold
Input Low Threshold
Input High Current
Input Low Current
ISC
VIH
VIL
IIH
VOUT=0V, IOUT= IIN
600
mA
V
All input pins (Enable, VSEL, FSEL)
All input pins (Enable, VSEL, FSEL)
All input pins (Enable, VSEL, FSEL)
All input pins (Enable, VSEL, FSEL)
1.3
0.4
10
10
V
µA
µA
IIL
Power Efficiency from Battery to
Regulated Charge Pump Output
VIN = 3.3V, VOUT = 5.0V, IOUT = 60mA
Freq.=262kHz
75.0
%
η
VIN = 3.3V, VOUT = 5.0V, IOUT = 60mA
Freq.=650kHz
74.5
25
%
(1), (2)
Output Ripple Voltage
VPP
freq = 262kHz, IOUT = 60mA
45
mV
Note:
(1) Peak to peak output ripple voltage with COUT=CBUCKET=1µF and X5R dielectric
(2) Guaranteed by design
(3) This device is ESD sensitive. Use of standard ESD handling precautions is required.
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SC603
POWER MANAGEMENT
Pin Configuration
Ordering Information
PACKAGE(1)
TOP VIEW
DEVICE
(2)
1
2
3
10
9
SC603IMLTRT
MLP-10 3x3mm
MLP-10 3x3mm
Evaluation Board
VOUT
CF1+
CF2+
CF1-
SC603IMLTR
8
VIN
FSEL
VSEL
GND
CF2-
EN
SC603EVB
7
4
5
T
Note:
6
(1) Available in tape and reel only. A reel contains 3000 devices.
(2) Lead free product.
MLP10: 3X3 10 LEAD
Pin Descriptions
Pin
Pin Name
VOUT
Pin Function
1
Output voltage regulated to 5.0V or 4.5V
Positive terminal of bucket capacitor 1
Input voltage ranging from 2.5V to 6.5V
2
CF1+
3
VIN
Logic input for selecting the operational frequency. FSEL= 0, freq = 262kHz;
FSEL= 1, freq = 650kHz
4
5
FSEL
VSEL
Logic input for selecting the output voltage. VSEL = 1, VOUT = 5V; VSEL = 0,
VOUT = 4.5V
6
EN
Active high enable. Bias current is less than 2uA when set low.
Negative terminal of bucket capacitor 2
Ground
7
CF2-
GND
CF1-
CF2+
8
9
Negative terminal of bucket capacitor 1
Positive terminal of bucket capacitor 2
10
Pad for heat sinking purposes. Connect to ground plane using multiple vias. Not
connected internally.
T
Thermal Pad
Block Diagram
3
VIN
SWITCH
BLOCK
1
VOUT
DRIVERS
650kHz or 262kHz
EN
MODE
EN 6
SELECT
OSC
2
9
CF1+
CF1-
CF2+
CF2-
4
FSEL
COMPARATORS
TIMER
VIN
VOUT
VREF
10
7
5
8
VSEL
GND
VIN
5.0V or 4.5V
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SC603
POWER MANAGEMENT
Applications Information
Frequency Selection
The FSEL input is for frequency selection. A logic High
level at this input will set the clock frequency to 650kHz,
while a logic Low sets the clock to 262kHz. Input from a
µP or other device may be used to change the charge
pump frequency at any time. The optimal frequency will
depend upon the capacitor values, the load current, and
the exceptable amount of output ripple.
Charge Pump Function for Low Ripple
The SC603 uses a voltage doubler circuit which is imple-
mented with two switched or ‘bucket’ capactors. Most
charge pump doublers use only one bucket capacitor.
Two bucket capacitors switching on alternate phases
greatly reduce the output ripple voltage.
Over-Voltage Protection for Low Voltage Capacitors
The output is prevented from exceeding 6.0V. This fea-
ture allows the use of 6.3V ceramic capacitors.
Ripple Performance
Examples of the output ripple, charge pump frequency
and capacitor size are listed in Table 2 Ripple Perfor-
mance.
Comparison with Other Regulation Methods
In many instances, a charge pump regulator is the best
choice for portable power applications. These regula-
tors offer many advantages over switch mode regula-
tors. A smaller bill of materials, less layout area, lower
component height, less noise, no EMF, and less overall
circuit cost are typical reasons to use this type of regula-
tion. The efficiency of a charge pump regulator often
approaches and in some cases exceeds the efficiency
of a switch mode regulator.
Efficiency
Efficiency for the SC603 is defined as,
V ⋅I
O
O
η
=
V
⋅ 2⋅I + I
( )
O Q
IN
where VO = output voltage
IO = output current
VIN = input voltage
IQ = quiescent current [from Electrical Charac-
teristics on page 2]
Inductors are often the largest and most expensive dis-
crete component in a design. There are no inductors
used in the SC603, so the inductor’s cost and layout
area are eliminated. The noise and EMF associated with
the inductor are also eliminated.
The SC603’s fixed frequency harmonics are an advan-
tage in portable communications equipment, such as
cellular telephones. The SC603 has distinct frequen-
cies of operation, so the harmonics are predictable. The
harmonics are not fixed in a switch mode regulator.
Switch mode regulators have harmonics which vary due
to the pulse width modulation used to regulate the out-
put. Varying harmonics can be a problem because it may
be more difficult to ensure acceptable noise perfor-
mance over the entire operating range.
Many switch mode regulators have increased voltage
ripple on the output during pulse skipping mode due to
the fact that there are large periods of time when no
current is supplied to the output. The SC603 supplies
current to the output continuously, so the voltage ripple
is less than a switch mode regulator, even with greatly
reduced output capacitance.
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SC603
POWER MANAGEMENT
Table 2 -Ripple Performance
Ouput Ripple [mVp-p]
VOUT
Freq. [kHz]
Iout [mA]
COUT [uF]
CBUCKET [uF]
262
650
262
650
262
650
262
650
100
100
150
150
100
100
200
200
25
15
50
25
25
15
60
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
5.0V
4.5V
30
Calculating Power Dissipation
Suggested Capacitors
The power dissipated by the SC603 is calculated as,
Table 3 is a short list of some of the manufacturers and
types of multilayer ceramic capacitors that are suggested
for the SC603.
=
=
P
V
− P
IN OUT
P
P
D
D
⋅ 2⋅I + I
− V ⋅I
O O
IN
O
Q
Short Circuit and Over Temperature Protection
The output is current limited to 600mA to protect against
short circuit conditions. Over temperature protection is
also provided.
Design and Layout Considerations
The layout should be patterned after the evaluation board
gerber plots shown on page 10. The center pad “ther-
mal slug” is not internally connected to ground, but is
connected to ground in the layout through a via centered
on the pad and connecting to the ground plane. Pin 8 is
then routed directly to the center pad. A good ground
plane connection is important to make effective use of
the low thermal resistance of the MLP package.
Table 3 -Suggested Capacitors
Voltage
Rating
Manufacturer
Part Number
Capacitance[uF]
Dielectric Type
EIA Package Size
AVX
0805ZC105K
1.0
1.0
1.0
1.0
X7R
X5R
X5R
X5R
0805
0402
0603
0805
10V
Panasonic
TDK
ECJ1VB0J105K
C1608X5R1A105
C1202Y5V1A106Z
6.3V
10V
TDK
10V
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SC603
POWER MANAGEMENT
Typical Characteristics
Efficiencyvs.Load Current
Efficiencyvs.Input Voltage
80.0%
70.0%
60.0%
50.0%
40.0%
30.0%
20.0%
10.0%
0.0%
85.0%
80.0%
75.0%
70.0%
65.0%
60.0%
55.0%
50.0%
45.0%
40.0%
5V Output, 3.8V Input
5V Output, 3.2V Input
4.5V Output, 3.8V Input
4.5V Output, 3.2V Input
5V, 150mA Output
4.5V, 200mA Output
0.0
20.0
40.0
60.0
80.0
100.0
120.0
140.0
160.0
180.0
200.0
3.000
3.200
3.400
3.600
3.800
4.000
4.200
Load Current [mA]
Line Regulation
Load Regulation
Load Regulation
Line Regulation
5.000
5.000
4.900
4.800
4.700
4.600
4.500
4.400
4.300
4.200
4.900
4.800
4.700
4.600
4.500
4.400
4.300
5V Output, 3.8V Input
4.5V Output, 3.8V Input
5V Output, 3.2V Input
4.5V Output, 3.2V Input
5V, 150mA Output
4.5V, 200mA Output
0.0
20.0
40.0
60.0
80.0
100.0
Load Current [mA]
120.0
140.0
160.0
180.0
200.0
3.000
3.500
4.000
4.500
5.000
5.500
6.000
Input Voltage [V]
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SC603
POWER MANAGEMENT
Ripple for 150mA, 5V Output
Quiescent Current
2.500
2.300
2.100
1.900
1.700
1.500
1.300
1.100
0.900
0.700
0.500
Vo=4.5, 262kHz
Vo=5.0V, 262kHz
Vo=4.5V, 650kHz
Vo=5.0V, 650kHz
2.700
3.200
3.700
4.200
4.700
5.200
Input Voltage [V]
Startup Conditions for 5.0V Output
Startup Conditions for 4.5V Output
100Hz PWM for 5.0V Application
100Hz PWM for 4.5V Application
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SC603
POWER MANAGEMENT
Evaluation Board Schematic
Evaluation Board Schematic
The evaluation board has a monostable multivibrator cir-
cuit to provide a pulse for demonstrating the flash circuit
function. Remove jumpers JP4 and JP5 to disable the
timing circuit when not in use to save battery current
used by R11 through the 555 IC. To adjust the pulse on-
time, adjust potentiometer R11. To activate the flash
circuit, depress switch S1.
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SC603
POWER MANAGEMENT
Evaluation Board Bill of Materials
Reference
U1
C1, C2, C3, C4
C5
R1 through R10
D1 through D10
Value
SC603
1.0uF
10uF
-
Comment
MLP -Micro 10 lead 3x3mm.
Ceramic, low ESR type, voltage of 6.3V rating is acceptable for all capacitors.
This extra capacitor supports usage of long power leads from a benchtop supply.
Add limiting resistors to meet the requirements of the application on 0805 pads.
Add white or blue LEDs to meet the requirements of the application on 1206 pads.
-
Evaluation Board Gerber Plots
Top View
Bottom View
Marking Information
Top Marking
603
yyww
yyww = Datecode (Example: 0452)
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SC603
POWER MANAGEMENT
Outline Drawing - MLP-10
DIMENSIONS
INCHES MILLIMETERS
A
E
B
E
DIM
A
MIN NOM MAX MIN NOM MAX
-
-
-
-
.031
A1 .000
.039 0.80
.002 0.00
1.00
0.05
-
-
-
-
(.008)
(0.20)
A2
b
C
D
E
e
.007 .009 .011 0.18 0.23 0.30
.074 .079 .083 1.87 2.02 2.12
.042 .048 .052 1.06 1.21 1.31
.114 .118 .122 2.90 3.00 3.10
PIN 1
INDICATOR
.020 BSC
0.50 BSC
(LASER MARK)
L
N
.012 .016 .020 0.30 0.40 0.50
10
.003
.004
10
0.08
0.10
aaa
bbb
A
C
SEATING
PLANE
aaa
C
A1
A2
C
L
1
2
LxN
D
N
bxN
bbb
e
C A B
NOTES:
1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES).
2. COPLANARITY APPLIES TO THE EXPOSED PAD AS WELL AS TERMINALS.
Contact Information
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SC603
POWER MANAGEMENT
Land Pattern - MLP-10
DIMENSIONS
INCHES MILLIMETERS
K
DIM
(.112)
.075
.055
.087
.020
.012
.037
.150
(2.85)
1.90
1.40
2.20
0.50
0.30
0.95
3.80
C
G
H
K
P
X
Y
Z
H
X
G
Y
(C)
Z
P
NOTES:
1.
THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY.
CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR
COMPANY'S MANUFACTURING GUIDELINES ARE MET.
Contact Information
Semtech Corporation
Power Management Products Division
200 Flynn Road, Camarillo, CA 93012
Phone: (805)498-2111 FAX (805)498-3804
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