AAT3119
AAT3119 is High Efficiency 2X Charge Pump manufactured by AAT.
High Efficiency 2X Charge Pump General Description
The AAT3119 is a general purpose high efficiency voltage regulated charge pump IC that can produce output current levels up to 150m A. 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 operates 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.
Features
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- Charge Pump™
VIN Range: 2.7V to 5.5V 150m A of Output Current
- Peak Current up to 250m A 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
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.
Applications
Cellular Phones Digital Cameras Handheld Electronics PDAs White LED Backlighting White LED Camera Flash
Typical Application
CFLY 1μF
C+ VIN CIN 1μF IN
COUT COUT 1μF VOUT
Enable EN GND
High Efficiency 2X Charge Pump Pin Descriptions
Pin #
1 2 3 4 5 6 7 8
Symbol
EN IN OUT C+ CGND GND...
