TPS54622 Datasheet | Texas Instruments

Features - 1 Integrated 26-mΩ and 19-mΩ MOSFETs - Split Power Rail: 1.6 V to 17 V on PVIN - 200-k Hz to 1.6-MHz Switching Frequency - Synchronizes to External Clock - 0.6V ±1% Voltage Reference Overtemperature - Hiccup Current Limit - Monotonic Start-Up Into Prebiased Outputs - - 40°C to 150°C Operating Junction Temperature Range - Adjustable Slow Start and Power Sequencing - Power Good Output Monitor for Undervoltage and Overvoltage - Adjustable Input Undervoltage Lockout - For SWIFT™ Documentation, visit http://.ti./swift - Create a Custom Design Using the TPS54622 With the WEBENCH® Power Designer 2 Applications - High-Density Distributed Power Systems - High-Performance Point-of-Load Regulation - Broadband, Networking, and Optical munications Infrastructure R3 CSS RRT C1 Simplified Schematic BOOT CBOOT LO PWRGD SS RT/CLK P VSENSE Power Pad C2 VOUT R1 R2 3 Description The TPS54622 device in thermally enhanced 3.5-mm × 3.5-mm VQFN package is a full-featured 17-V, 6-A synchronous step-down converter optimized for small designs through high efficiency and integrating the high-side and low-side MOSFETs. Further space savings are achieved through current mode control, which reduces ponent count, and by selecting a high switching frequency, reducing the footprint of the inductor. The output voltage start-up ramp is controlled by the SS/TR pin, which allows operation as either a standalone power supply or in tracking situations. Power sequencing is also possible by correctly configuring the enable and the open-drain power good pins. Cycle-by-cycle current limiting on the high-side FET protects the device in overload situations and is enhanced by a low-side sourcing current limit that prevents current runaway. There is also a low-side sinking current limit that turns off the low-side MOSFET to prevent excessive reverse current. Hiccup protection is triggered if the overcurrent condition has persisted for longer than the preset time....