Description：

The TPS54623, available in a thermally enhanced VQFN package, is a fully featured 17V, 6A synchronous buck converter that offers high efficiency and integrates both high-side and low-side MOSFETs, optimized for small designs. Current mode control reduces component count, and the ability to select high switching frequencies further shrinks the inductor size to save board space. The output voltage startup ramp is controlled by the SS/TR pin, which supports both independent power supply operation and tracking mode. In addition, proper configuration of the enable pin and open-drain power-good pin allows for power sequencing. Cycle-by-cycle current limiting on the high-side FET protects the device in overload conditions, and the low-side sourcing current limit prevents runaway current, enhancing the limiting effect. Furthermore, a low-side sinking current limit that turns off the low-side MOSFET is provided to prevent excessive reverse current. When an overcurrent condition persists beyond a preset time, hiccup protection is triggered. When the die temperature exceeds the thermal shutdown threshold, thermal hiccup protection disables the device and re-enables it after the internal thermal shutdown hiccup time. The TPS54623 operates in continuous conduction mode (CCM) under high load conditions and can improve light-load efficiency by skipping pulses.

Features：

• Integrated 26mΩ and 19mΩ MOSFETs

• Split power rail: 1.6V to 17V (PVIN)

• Switching frequency: 200kHz to 1.6MHz

• Skip pulse mode improves light-load efficiency

• Synchronization to external clock

• 0.6V ±1% voltage reference over temperature

• Low quiescent current of 2µA in shutdown

• Monotonic startup into pre-biased output

• –40°C to 150°C operating junction temperature range

• Adjustable soft-start and power sequencing

• Power-good output monitor for undervoltage and overvoltage

• Adjustable input undervoltage lockout

• Create a custom design using TPS54623 with WEBENCH® Power Designer

Applications：

• High-density distributed power systems

• High-performance point-of-load regulation

• Broadband, networking, and optical communications infrastructure