TPS54335A Datasheet | Texas Instruments

Features - 1 Synchronous 128-mΩ and 84-mΩ MOSFETs for 3-A Continuous Output Current - TPS54335A: Internal 2-ms Soft-Start, 50-k Hz to 1.5-MHz Adjustable Frequency - TPS54336A: Adjustable Soft-Start, Fixed 340-k Hz Frequency - Low 2-µA Shutdown, Quiescent Current - 0.8-V Voltage Reference with ±0.8% Accuracy - Current Mode Control - Monotonic Startup into Pre-Biased Outputs - Pulse Skipping for Light-Load Efficiency - Hiccup Mode Overcurrent Protection - Thermal Shutdown (TSD) and Overvoltage Transition Protection - 8-Pin SO Power PAD™ and 10-Pin VSON Package - Create a Custom Design Using the TPS54335A with the WEBENCH Power Designer 2 Applications - Consumer Applications such as a Digital TV (DTV), Set Top Box (STB, DVD/Blu-ray Player), LCD Display, CPE (Cable Modem, Wi Fi Router), DLP Projectors, Smart Meters - Battery Chargers - Industrial and Car Audio Power Supplies - 5-V, 12-V, and 24-V Distributed Power Bus Supply 3 Description The TPS5433x A family of devices are synchronous converters with an input-voltage range of 4.5 V to 28 V. These devices include This device has an integrated low-side switching FET that eliminates the need for an external diode which reduces ponent count. Efficiency is maximized through the integrated 128mΩ and 84-mΩ MOSFETs, low IQ and pulse skipping at light loads. Using the enable pin, the shutdown supply current is reduced to 2 μA. This step-down (buck) converter provides accurate regulation for a variety of loads with a well-regulated voltage reference that is 1.5% over temperature. Cycle-by-cycle current limiting on the high-side MOSFET protects the TPS5433x A family of devices in overload situations and is enhanced by a low-side sourcing current limit which prevents current runaway. A low-side sinking current-limit turns off the low-side MOSFET to prevent excessive reverse current. Hiccup protection is triggered if the overcurrent condition continues for longer than the preset time. Thermal shutdown disables the device when the die...