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Home » NEWEST Products » New by Manufacturer » Texas Instruments » TPS51123A Step-Down Controllers from TI
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TI TPS51123A Dual-Synchronous Step-Down Controllers

TI TPS51123A Dual-Synchronous
Step-Down Controllers

Texas Instruments TPS51123A Dual-Synchronous Step-Down Controllers are wide-input voltage devices targeted for notebook system power supply solutions. The TI TPS1123A supports high-efficiency, fast-transient responses and provides a combined power-good signal. Out-of-Audio™ mode light-load operation enables low acoustic noise at much higher efficiency than conventional forced PWM operation. TI TPS51123A step-down controllers operate with supply input voltages ranging from 5.5V to 28V and support output voltages from 2V to 5.5V.

Features
  • Wide-Input Voltage Range: 5.5V to 28V
  • Output Voltage Range: 2V to 5.5V
  • 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 Soft-Start
  • Adaptive On-Time Control Architecture with Four Selectable Frequency Setting
  • 4500 ppm/°C RDS(on) Current Sensing
  • Built-In Output Discharge
  • Power Good Output
  • Built-in OVP/UVP/OCP
  • Thermal Shutdown (Non-latch)
  • 24-Pin QFN (RGE) Package
Applications
  • Notebook Computers
  • I/O Supplies
  • System Power Supplies
Block Diagram
Block Diagram
  • Texas Instruments
  • Semiconductors|Integrated Circuits|IC-Power Management