TPS65251

Product Folder Order Now Technical Documents Tools & Software Support & Community Reference Design TPS65251 SLVSAA4G – JUNE 2010 – REVISED FEBRUARY 2018 TPS65251 4.5-V to 18-V Input, High-Current, Synchronous Step-Down Three Buck Switcher With Integrated FET 1 Features 1 Wide Input Supply Voltage Range (4.5 to 18 V) 0.8 V, 1% Accuracy Reference Continuous Loading: 3 A (Buck 1), 2 A (Buck 2 and 3) Maximum Current: 3.5 A (Buck 1), 2.5 A (Buck 2 and 3) Adjustable Switching Frequency 300 kHz to 2.2 MHz Set by External Resistor Dedicated Enable for Each Buck External Synchronization Pin for Oscillator External Enable/Sequencing and Soft-Start Pins Adjustable Current Limit Set By External Resistor Soft-Start Pins Current-Mode Control With Simple Compensation Circuit Powergood Optional Low-Power Mode Operation for Light Loads VQFN Package, 40-Pin 6 mm × 6 mm RHA 2 Applications Set Top Boxes Blu-ray DVD DVR DTV Car Audio/Video Security Camera 3 Description The TPS65251 features three synchronous wide input range high efficiency buck converters. 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 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 close to the input supply. Each converter features e...