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AAT2842 - High Current Charge Pump

General Description

The AAT2842 is a highly integrated charge pump with dual linear regulators optimized for systems operating with lithium-ion/polymer batteries.

The charge pump provides power for both white LED backlight/keypad and flash.

Key Features

  • VIN Range: 2.7V to 5.5V.
  • Tri-Mode Charge Pump:.
  • Drives up to Four Backlight/Keypad and Four Flash LEDs.
  • Separate S2Cwire Control for Backlight/Keypad and Flash Currents.
  • Backlight/Keypad and Flash Current Set by Separate External Resistors.
  • Flash Timer Set with External Capacitor.
  • Up to 2MHz Switching Frequency.
  • Two Linear Regulators:.
  • 200mA Output Current.
  • 200mV Dropout.
  • Output Voltage Adjustable from 1.2V to.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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DATA SHEET AAT2842 High Current Charge Pump with S2CwireTM Control and Dual LDO for Backlight and Flash General Description The AAT2842 is a highly integrated charge pump with dual linear regulators optimized for systems operating with lithium-ion/polymer batteries. The charge pump provides power for both white LED backlight/keypad and flash. Up to four backlight LEDs can be driven at up to 30mA each and keypad LEDs can be driven using lower currents set by the S2Cwire interface. In addition, up to four flash LEDs can be driven with up to 600mA total. Two separate S2Cwire™ (Simple Serial Control™) serial digital interfaces are used to enable, disable, and set the current to one of 16 levels for both backlight and flash LEDs.