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TPS51125 Datasheet Step-Down Controller

Manufacturer: Texas Instruments

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General Description

The TPS51125 is a cost-effective, dual-synchronous buck controller targeted for notebook system power supply solutions.

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

The 270-kHz VCLK output can be used to drive an external charge pump, thus generating gate drive voltage for the load switches without reducing the efficiency of the main converter.

Overview

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community TPS51125 SLUS786H – OCTOBER 2007 – REVISED JANUARY 2015 TPS51125 Dual-Synchronous, Step-Down Controller With Out-of-Audio™ Operation.

Key Features

  • 1 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 and 3.3-V LDO With Switches.
  • Built-In 1% 2-V Reference Output.
  • With or Without Out-of-Audio™ Mode Selectable Light-Load and PWM-Only Operation.
  • Internal 1.6-ms Voltage Servo Soft-Start.
  • Adaptive On-Time Control Architecture With Four Selectable Frequency Setting.
  • 4500 ppm/°C RDS(on) Current Sensing.
  • Built-In Output Di.

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