TPS65253

TPS65253 www.ti.com SLVSAW8 – JUNE 2011 4.5-V TO 16-V INPUT, HIGH CURRENT, SYNCHRONOUS STEP DOWN DUAL BUCK CONVERTER WITH INTEGRATED FETS Check for Samples: TPS65253 FEATURES 1 Wide Input Supply Voltage Range: 4.5 V - 16 V Output Range: 0.8 V to ~VIN-1 V Fully Integrated Dual Buck, 3.5-A/2.5-A Continuous Current (4-A/3-A Maximum Current) High Efficiency 300-kHz - 1.2-MHz Switching Frequency Set by External Resistor External Eenable/Sequencing Pins Adjustable Cycle-by-Cycle Current Limit Set by External Resistor Soft-Start Pins Current-Mode Control With Simple Compensation Circuit Power Good and Reset Generator Low Power Mode Set By External Signal Supervisory Circuit QFN Package, 28-Pin 5 mm x 5 mm RHD APPLICATIONS DTV DSL Modems Cable Modems Set Top Boxes Car DVD Players Home Gateway and Access Point Networks Wireless Routers DESCRIPTION/ORDERING INFORMATION The TPS65253 features two synchronous wide input range high efficiency buck converters. The converters are designed to simplify product application while giving designers the options to optimize their usage according to the target application. The converters can operate in 5-, 9- and 12-V systems and have integrated power transistors. The output voltage can be set externally using a resistor divider to any value between 0.8 V and the input supply minus 1 V. Each converter features an enable pin that allows a delayed start-up for sequencing purposes, soft-start pin that allo...