描述 Description

The AAT3112 is a member of AnalogicTech’s Total Power Management IC? (TPMIC?) family. It is a dual voltage doubling charge pump that provides a regulated output voltage. It operates with an input voltage range of 2.7 to 5.0 volts. The device can deliver a constant 200mA output load current and up to 500mA of pulsed current. The 500mA peak current capability of the AAT3112 makes it ideal for white LED flash applications. A low external parts count (two 1μF flying capacitors and two small capacitors at VIN and VOUT) makes the AAT3112 ideally suited for small battery-powered applications.
The AAT3112 has a thermal management system to protect the device in the event of a short-circuit condition at the output pin. Built-in soft-start circuitry prevents excessive inrush current during start-up. A high charge pump switching frequency enables the use of very small external capacitors. A low current shutdown feature disconnects the load from VIN and reduces quiescent current to less than 1μA.
The AAT3112 is available in a Pb-free 16-pin 3x3mm QFN package and is rated over the -40°C to +85°C temperature range. Please note: AAT3112 is not recommended for new designs. Please contact sales with regards to replacement parts.

特性 Features

·VIN Range: 2.7V to 5.5V
·AAT3112-5.0: 2.7V to 5.0V
·AAT3112-4.5: 2.7V to 4.5V
·Up to 500mA Peak Output Current
·200mA Continuous Output Current
·IQ < 1μA in shutdown
·Regulated 4.5V output
·26μA of quiescent current
·Small application circuit
·Automatic soft-start
·No inductors
·Short circuit/over-temperature protection
·16-pin 3x3 QFN package
·Temperature Range: -40°C to +85°C