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CAT3200ZI-GT3 Datasheet(PDF) 1 Page - Catalyst Semiconductor |
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CAT3200ZI-GT3 Datasheet(HTML) 1 Page - Catalyst Semiconductor |
1 / 12 page © Catalyst Semiconductor, Inc. Characteristics subject to change without notice 1 Doc. No. MD-5002, Rev. L CAT3200, CAT3200-5 Low Noise Regulated Charge Pump DC-DC Converter 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 1 µF 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 battery- powered applications. FEATURES s Constant high frequency (2MHz) operation s 100mA output current s Regulated output voltage (5V fixed CAT3200-5, Adjustable CAT3200) s Low quiescent current (1.7mA typ.) s Input voltage operation down to 2.7V s Soft start, slew rate control s Thermal overload shutdown protection s Low value external capacitors (1 µF) s Foldback current overload protection s Shutdown current less than 1 µA s CAT3200-5 in low profile (1mm thin) 6-lead 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 A shutdown control input allows the device to be placed in power-down mode, reducing the supply current to less than 1 µA. 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. s Local 5V supply from lower rail s Battery backup systems s Handheld portable devices TYPICAL APPLICATION CAT3200-5 CNEG CPOS IN OUT ON OFF SHDN GND + - 5V Output 3.3V CAT3200 CNEG CPOS IN OUT ON OFF SHDN GND + - 3.3V VIN 5V 100mA VOUT Adjustable Output VIN FB R1 R2 100mA VOUT VOUT = 1.27 V 1+ ( R1 R2 |
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