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CAT3200

Catalyst Semiconductor
Part Number CAT3200
Manufacturer Catalyst Semiconductor
Description Low Noise Regulated Charge Pump DC-DC Converter
Published Mar 23, 2005
Detailed Description CAT3200, CAT3200-5 Low Noise Regulated Charge Pump DC-DC Converter FEATURES s Constant high frequency (2MHz) operation s...
Datasheet PDF File CAT3200 PDF File

CAT3200
CAT3200

Overview
CAT3200, CAT3200-5 Low Noise Regulated Charge Pump DC-DC Converter FEATURES s Constant high frequency (2MHz) operation s 100mA output current s Regulated output voltage (5V fixed CAT3200-5, H GEN FR ALO EE LE A D F R E ETM s Thermal overload shutdown protection s Low value external capacitors (1µF) s Foldback current overload protection s Shutdown current less than 1µA s CAT3200-5 in low profile (1mm thin) 6-lead Adjustable CAT3200) s Low quiescent current (1.
7mA typ.
) s Input voltage operation down to 2.
7V s Soft start, slew rate control SOT23 package s CAT3200 in MSOP-8 package APPLICATIONS s 3V to 5V boost conversion s White LED driver s USB On-The-Go 5V supply s Local 5V supply from lower rail s Battery backup systems s Handheld portable devices DESCRIPTION The CAT3200 and CAT3200-5 are switched capacitor boost converters that deliver a low noise, regulated output voltage.
The CAT3200-5 gives a fixed regulated 5V output.
The CAT3200 has an adjustable output using external resistors.
The constant frequency 2MHz charge pump allows small 1µF ceramic capacitors to be used.
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 batterypowered applications.
A shutdown control input allows the device to be placed in power-down mode, reducing the supply current to less than 1µA.
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.
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 VIN IN CPOS OUT 5V VOUT 100mA VIN IN CNEG CPOS OUT VOUT 100mA R1 FB GND R2 CAT3200-5 + 3.
3V ON OFF SHDN GND CAT3200 + 3.
3V ON OFF SHDN R VOUT = 1.
27 V 1+ 1 R2 © 2004 by Catalyst Semicond...


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