TI TPS51221RTVT

降压同步（1），线性（LDO）（2）3控制器4.5V ~ 28V

Overview

The TPS51221RTVT is a dual synchronous buck regulator controller with 2 LDOs.It is optimized for 5-V/3.3-V system controller, enabling designers to cost effectively complete 2-cell to 4-cell notebook system power supply. The TPS51221RTVT supports high efficiency, fast transient response and 99% duty cycle operation. It supports supply input voltage ranging from 4.5 V to 28 V, and output voltages from 1 V to 12 V. Peak current mode supports stability operation with lower ESR capacitor and output accuracy. The high duty (99%) operation and wide input/ output voltage range supports flexible design for small mobile PCs and a wide variety of other applications. The fixed frequency can be adjusted from 200 kHz to 1MHz by a resistor, and each channel runs 180° out of phase. The TPS51221RTVT can also synchronize to the external clock, and the interleaving ratio can be adjusted by its duty. The TPS51221RTVT is available in the 32-pin 5×5 QFN package and is specified from -40°C to 85°C.

Features

Input voltage range: 4.5 V to 32 V

Output voltage range: 1 V to 12 V

OCL/OVP/UVP/UVLO protections

Thermal shutdown (non-latch)

Applications

Point of load in LCD TV, MFP

Notebook computer system and I/O bus