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TPS51125A - Step-Down Controller

General Description

The TPS51125A is a cost effective, dual-synchronous buck controller targeted for notebook system power supply solutions.

It provides 5-V and 3.3-V LDOs and requires few external components.

Key Features

  • 1.
  • 2 Wide Input Voltage Range: 5.5 V to 28 V.
  • Output Voltage Range: 2 V to 5.5 V.
  • Built-in 100-mA 5-V/3.3-V LDO with Switches.
  • Built-in 1% 2-V Reference Output.
  • With/Without Out-of-Audio™ Mode Selectable Light Load and PWM only Operation.
  • Internal 1.6-ms Voltage Servo Softstart.
  • Adaptive On-Time Control Architecture with Four Selectable Frequency Setting.
  • 4500 ppm/°C RDS(on) Current Sensing.
  • Built-In Output Discharge.

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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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TPS51125A www.ti.com SLUS976F – SEPTEMBER 2009 – REVISED SEPTEMBER 2012 Dual-Synchronous, Step-Down Controller with Out-of-Audio™ Operation and 100-mA LDOs for Notebook System Power Check for Samples: TPS51125A FEATURES 1 •2 Wide Input Voltage Range: 5.5 V to 28 V • Output Voltage Range: 2 V to 5.5 V • Built-in 100-mA 5-V/3.3-V LDO with Switches • Built-in 1% 2-V Reference Output • With/Without Out-of-Audio™ Mode Selectable Light Load and PWM only Operation • Internal 1.