SC603 Datasheet, PDF (1/12 Pages) Semtech Corporation – CHARGE PUMP REGULATOR WITH SELECTABLE 5.0V/4.5V OUTPUT

SC603
CHARGE PUMP REGULATOR WITH
SELECTABLE 5.0V/4.5V OUTPUT
POWER MANAGEMENT
Description
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.
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.
Compared to a switch mode regulator, the SC603 offers
a solution with less cost, area, noise and complexity.
Typical Application Circuit
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
‹ Regulated to +/-5%
‹ Ease of use
Applications
‹ Cellular phones
‹ LED photo flash for cellular phones
‹ LED backlighting
‹ PDA power supplies
‹ Portable electronics
‹ Electronic books
‹ Wireless web appliances
2.7V to 6.5V
Cin
1.0uF
3
VIN
6 _EN
4
FSEL
5
VSEL
U1
1
VOUT
2
CF1+
9
CF1-
10
CF2+
7
CF2-
GND
8
4.5V or 5.0V
Cbucket1
1.0uF
Cbucket2
1.0uF
Cout
1.0uF
UP TO 10 LEDS
November 2, 2004
1
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