CAT3200, CAT3200-5
Low Noise Regulated Charge Pump DC-DC Converter
FEATURES
■ Thermal overload shutdown protection
■ Constant high frequency (2MHz) operation
■ 100mA output current
■ Low value external capacitors (1µF)
■ Foldback current overload protection
■ Shutdown current less than 1µA
■ Regulated output voltage (5V fixed CAT3200-5,
Adjustable CAT3200)
■ Low quiescent current (1.7mA typ.)
■ Input voltage operation down to 2.7V
■ Soft start, slew rate control
■ CAT3200-5 in low profile (1mm thin) 6-lead
SOT23 package
■ CAT3200 in MSOP-8 package
APPLICATIONS
■ 3V to 5V boost conversion
■ White LED driver
■ Local 5V supply from lower rail
■ Battery backup systems
■ USB On-The-Go 5V supply
■ Handheld portable devices
DESCRIPTION
A shutdown control input allows the device to be
placed in power-down mode, reducing the supply
current to less than 1µA.
The CAT3200 and CAT3200-5 are switched capacitor
boost converters that deliver a low noise, regulated
outputvoltage. TheCAT3200-5givesafixedregulated
5V output. The CAT3200 has an adjustable output
usingexternalresistors. Theconstantfrequency2MHz
charge pump allows small 1µF ceramic capacitors to
be used.
In the event of short circuit or overload conditions, the
device is fully protected by both foldback current
limiting and thermal overload detection. In addition, a
soft start, slew rate control circuit limits inrush current
during power-up.
Maximum output loads of up to 100mA can be
supported over a wide range of input supply voltages
(2.7V to 4.5V) making the device ideal for battery-
powered applications.
The CAT3200-5 is available in a 6-lead, 1mm max
thin SOT23 package. The CAT3200 is available in an
8-lead MSOP package.
TYPICAL APPLICATION
5V Output
Adjustable Output
CNEG
CPOS
CNEG
CPOS
5V
V
V
V
IN
OUT
FB
IN
OUT
V
IN
IN
OUT
100mA
OUT
100mA
CAT3200-5
CAT3200
R
1
ON OFF
ON OFF
+
-
+
-
SHDN
SHDN
3.3V
3.3V
GND
GND
R
2
(
R
R
1
2
V
= 1.27 V 1+
(
OUT
© Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
Doc. No. MD-5002, Rev. L
1