1 Features
• 4.5-V to 17-V input range without external bias
• 3.8-V to 17-V input range with external bias
• Supports 8-A continuous output current
• Integrated 7.8-mΩ and 3.2-mΩ MOSFETs
• 0.6-V ±1% reference voltage across a –40°C to
125°C junction range
• 0.6-V to 5.5-V output voltage range
• 146-μA low quiescent current
• D-CAP3™ control mode for fast transient response
• Supports ceramic output capacitors
• Selectable fSW of 400 kHz, 800 kHz, and 1200 kHz
• Selectable FCCM (forced continuous conduction
mode) for tight output voltage ripple
• Selectable Eco-mode™ (auto skip mode) for high
light-load efficiency
• Optional external 5-V bias for enhanced efficiency
• Prebiased start-up capability
• Adjustable soft start with a default 1.2-ms soft-start
time
• Power-good indicator to monitor output voltage
• Two adjustable current limit settings with hiccup
restart
• Non-latched protections for UV, OV, OT, and UVLO
• Pin-to-pin compatible with 8-A TPS568215, and
12-A TPS56C231 and TPS56C215
• –40°C to 125°C operating junction temperature
• 3.5-mm × 3.5-mm, 18-pin HotRod™ QFN package

2 Applications
• Data center and enterprise computing POLs
• Wireless infrastructure
• IPCs, factory automation, PLC, test measurement
• High-end DTV

3 Description
The TPS568231 is a small, high-efficiency,
synchronous buck converter with an adaptive ontime
D-CAP3 control mode. Because external
compensation is not required, the device is easy
to use and requires few external components. The
device is well-suited for space-constrained data
center applications.
The TPS568231 has competitive features including
a very accurate reference voltage, fast load
transient response, and no requirement for external
compensation, adjustable current limit, and both Ecomode
and FCCM operation modes for selection at
light-load condition through configuration of MODE
pin. To attain high efficiency at light load, Eco-mode
can be selected. To support tight output voltage ripple
requirement, FCCM can be selected. The TPS568231
operates from –40°C to 125°C junction temperature.