TI Delivers Tiny, Dual, Step-down DC/DC Controller
(Technology News, 08 Aug 2008 )
The TPS51125 is a cost-effective, dual, synchronous buck controller solution for notebook system power supply with internal 3.3-V and 5-V LDOs. It supports high efficiency at light loads and fast transient response with the D-CAPTM adaptive on-time control architecture. The integrated out-of-audio operation of the device improves noise performance. Input supply voltage range for the device is 5.5-V to 42-V and out voltage range is 2-V to 5.5-V. The TPS51125 can be used in notebook PCs and light-load, battery-powered equipment.
Feature § 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 § Power Good Output § Built-in OVP/UVP/OCP § Thermal Shutdown (Non-latch) § QFN24 (RGE) § APPLICATIONS § Notebook Computers § I/O Supplies § System Power Supplies
Out-of-Audio, D-CAP Is a trademark of Texas Instruments
