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.