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AAT3119 Datasheet(PDF) 1 Page - Advanced Analogic Technologies |
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AAT3119 Datasheet(HTML) 1 Page - Advanced Analogic Technologies |
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1 / 16 page  General Description The AAT3119 is a general purpose high efficiency voltage regulated charge pump IC that can produce output current levels up to 150mA. As a voltage regulated output device, it may be used for general voltage boost applications or to power white, RGB, or flash type LEDs from a 2.7V to 5.5V input. The voltage doubling charge pump architecture of the AAT3119 provides for a low external part count; just three small ceramic capacitors are needed. This makes the AAT3119 ideally suited for small battery-powered applications. This device oper- ates from a fixed high frequency 1.2MHz oscillator which enables the use of very small external capacitors, one 1µF flying capacitor, and two 1µF bypass capacitors at IN and OUT. The AAT3119 has built-in soft-start circuitry which prevents excessive inrush current from the source supply during startup. A low-current shutdown fea- ture disconnects the load from VIN and reduces quiescent current to less than 1.0µA when the device is disabled. The AAT3119 is available in a Pb-free, 8-pin SC70JW package and is rated over the -40°C to +85°C temperature range. Features •VIN Range: 2.7V to 5.5V • 150mA of Output Current — Peak Current up to 250mA • Regulated Output Voltage • 1.2MHz Switching Frequency • Low Noise Constant Frequency Operation • <1.0µA of Shutdown Current • Automatic Soft Start • Small Application Circuit • Inductorless Boost • 8-Pin SC70JW Package • -40°C to +85°C Temperature Range Applications • Cellular Phones • Digital Cameras • Handheld Electronics • PDAs • White LED Backlighting • White LED Camera Flash AAT3119 High Efficiency 2X Charge Pump Typical Application AAT3119 IN GND EN OUT COUT C IN 1µF 1µF 1µF C+ C- C FLY Enable V IN V OUT 3119.2005.08.1.1 1 ChargePump™ |
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