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TPS51123 - Step-Down Controller

Datasheet Summary

Description

The TPS51123 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.

The TPS51123 supports high efficiency, fast transient responses and provides a combined power-good signal.

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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Datasheet preview – TPS51123

Datasheet Details

Part number TPS51123
Manufacturer Texas Instruments
File Size 2.40 MB
Description Step-Down Controller
Datasheet download datasheet TPS51123 Datasheet
Additional preview pages of the TPS51123 datasheet.

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Full PDF Text Transcription

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TPS51123 www.ti.com SLUS890E – DECEMBER 2008 – REVISED JANUARY 2013 Dual-Synchronous, Step-Down Controller with Out-of-Audio™ Operation and 100-mA LDOs for Notebook System Power Check for Samples: TPS51123 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.
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