TPS65258

TPS65258 www.ti.com SLVSAB31 – SEPTEMBER 2011 4.5-V TO 16-V INPUT, HIGH CURRENT, SYNCHRONOUS STEP DOWN THREE DC-DC CONVERTERS WITH INTEGRATED FET AND 2 USB SWITCHES Check for Samples: TPS65258 FEATURES 1 Wide Input Supply Voltage Range: 4.5 V - 16 V 0.8-V, 1% Accuracy Reference Continuous Loading: 3 A (Buck1), 2 A (Buck2 and 3) Maximum Current: 3.5 A (Buck 1), 2.5 A (Buck2 and 3) Synchronous Operation, 300-kHz – 2.2-MHz Switching Frequency Set By External Resistor External Enable Pins With Built-In Current Source for Easy Sequencing External Soft Start Pins Adjustable Cycle-by-Cycle Current Limit Set by External Resistor Current-Mode Control With Simple Compensation Circuit Automatic Low Pulse Skipping (PSM) Power Mode, Allowing for an Output Ripple Better than 2% Forced PWM Mode Support Pre-Biased Outputs Power Good Supervisor and Reset Generator 1-A, 2 USB Power Switches With Overcurrent and Thermal Protection Small, Thermally Efficient 40-Pin 6-mm x 6-mm RHA (QFN) package -40°C to 125°C Junction Temperature Range DESCRIPTION/ORDERING INFORMATION TPS65258 is a power management IC with three step-down buck converters. Both high-side and low-side MOSFETs are integrated to provide fully synchronous conversion with higher efficiency. The converters are designed to simplify its application while giving the designer the option to optimize their usage according to the target application. The converters can operate in 5-, 9-, 12- or 15-V syst...