TPS54623RHLT

The TPS54623, available in a thermally enhanced VQFN package, is a fully featured 17V 6A synchronous buck converter with high efficiency and integrated high-side and low-side MOSFETs, optimized for compact designs. Current mode control reduces component count, and selecting a higher switching frequency allows a smaller inductor to further save board space. The output voltage startup ramp is controlled by the SS/TR pin, which supports both standalone power supply operation and tracking mode. In addition, proper configuration of the enable and open-drain power-good pins enables power sequencing. Cycle-by-cycle current limiting on the high-side FET protects the device under overload conditions, while a low-side source current limit prevents current runaway for enhanced protection. A low-side sink current limit is also provided, which can turn off the low-side MOSFET to prevent excessive reverse current. When an overcurrent condition persists beyond a preset duration, hiccup protection is triggered. When the die temperature exceeds the thermal shutdown threshold, the thermal hiccup protection feature disables the device and re-enables it after the built-in thermal shutdown hiccup interval. The TPS54623 operates in continuous conduction mode (CCM) under higher load conditions and improves light-load efficiency by pulse skipping.

Applications

• High-density distributed power systems
• High-performance point-of-load regulation
• Broadband, networking, and fiber optic communication infrastructure

Key features

• Integrated 26mΩ and 19mΩ MOSFETs
• Split power rails: 1.6V to 17V (PVIN)
• Switching frequency: 200kHz to 1.6MHz
• Pulse-skip mode for improved light-load efficiency
• Synchronization to external clock
• 0.6V ±1% voltage reference
• Thermal shutdown protection
• Quiescent current as low as 2μA during shutdown
• Single start-up into pre-biased output
• Operating junction temperature range: -40°C to 150°C
• Adjustable soft-start and power sequencing
• Power Good output monitor for undervoltage and overvoltage
• Adjustable input undervoltage lockout
• Create custom designs with TPS54623 using WEBENCH Power Designer