TPS51123A
www.ti.com SLUSAA6C – APRIL 2011 – REVISED SEPTEMBER 2012 Dual-Synchronous, Step-Down Controller with Out-of-Audio™ Operation and 100-mA
LDOs for Notebook System Power
Check for Samples: TPS51123A FEATURES APPLICATIONS 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-Audioв„ў 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/В°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 Notebook Computers
I/O Supplies
System Power Supplies DESCRIPTION
The TPS51123A 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 …
