CAT3200ZI-GT3

低噪音电荷泵直流-直流转换器

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 5.0 V output. The CAT3200 has an adjustable output using external resistors. The constant frequency 2.0 MHz charge pump allows small 1.0 µF ceramic capacitors to be used.Maximum output loads of up to 100 mA can be supported over a wide range of input supply voltages 2.7 V to 4.5 V, making the device ideal for battery-powered applications.A shutdown control input allows the device to be placed in power-down mode, reducing the supply current to less than 1.0 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.

Features

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Constant high frequency 2.0 MHz operation

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100 mA output current

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Regulated output voltage 5.0 V fixed CAT3200-5, Adjustable CAT3200

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Low quiescent current 1.7 mA typ.

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Input voltage operation down to 2.7 V

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Soft start, slew rate control

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Thermal overload shutdown protection

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Low value external capacitors 1.0 µF

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Foldback current overload protection

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Shutdown current less than 1.0 µA