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AAT3119 Datasheet(PDF) 1 Page - Advanced Analogic Technologies

Part No. AAT3119
Description  High Efficiency 2X Charge Pump
Download  18 Pages
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Manufacturer  ANALOGICTECH [Advanced Analogic Technologies]
Direct Link  http://www.analogictech.com
Logo ANALOGICTECH - Advanced Analogic Technologies

AAT3119 Datasheet(HTML) 1 Page - Advanced Analogic Technologies

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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
VIN
V
OUT
3119.2007.02.1.2
1
ChargePump


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