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MP1531 - Triple Output Step-Up Plus Charge Pump

General Description

The MP1531 is a triple output step-up converter with charge-pumps to make a complete DC/DC converter to power a TFT LCD panel from a 2.7V to 5.5V supply.

The MP1531 includes a 250kHz fixed frequency step-up converter and a positive and negative linear regulator.

Key Features

  • 2.7V to 5.5V Operating Input Range.
  • 500mA Switch Current Limit.
  • 3 Outputs in a Single Package.
  • Step-Up Converter up to 22V.
  • Positive 10mA Linear Regulator.
  • Negative 10mA Linear Regulator.
  • 250mΩ Internal Power MOSFET Switch.
  • 95% Efficiency.
  • 1μA Shutdown Mode.
  • Fixed 250kHz Frequency.
  • Positive Regulator up to 38V.
  • Negative Regulator down to -20V.
  • Internal Power-On Sequencing.
  • Adjustable Soft-Start/Fault Timer.
  • Thermal Shutd.

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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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The Future of Analog IC Technology MP1531 Low Power, Triple Output Step-Up Plus Charge Pump for TFT Bias DESCRIPTION The MP1531 is a triple output step-up converter with charge-pumps to make a complete DC/DC converter to power a TFT LCD panel from a 2.7V to 5.5V supply. The MP1531 includes a 250kHz fixed frequency step-up converter and a positive and negative linear regulator. The linear regulators are powered via charge-pumps driven by the step-up converter switch node. A single on/off control enables all 3 outputs. The outputs are internally sequenced at power-on for ease of use. An internal soft-start prevents overloading the input source at startup. Cycle-by-cycle current limit reduces component stress.