1 Features

• 4-V to 16-V input voltage range

• 3.13-V to 5.3-V external VCC bias support

• 5.8-mΩ and 2.3-mΩ MOSFETs (VVCC = 3.3 V)

• 25-A continuous output current

• Optimized 16-pin VQFN-HR package for efficiency

and thermal performance

• ±0.5 reference (VREF) for TJ = –40°C to +125°C

• VREF to 5.5-V output voltage range

• Differential remote sense

• D-CAP4 with ultra fast load-step response

• Supports all ceramic output capacitors

• Selectable Auto-skip Eco-mode for high light-load

efficiency

• Programmable current limit with RILIM

• Selectable switching frequency:

800 kHz, 1.1 MHz, 1.4 MHz

• Programmable soft-start time

• Prebiased start-up capability

• Open-drain power-good output

• Valley overcurrent limit protection

• Overvoltage and undervoltage fault protection

2 Applications

• Rack server and blade server

• Hardware accelerator and add-in cards

• Data center switches

• Industrial PC

• Baseband unit (BBU)

3 Description

The TPS54KB2x device is a small, high-efficiency,

synchronous buck converter with an adaptive ontime

D-CAP4 control mode. The control method

provides low minimum on-time and fast load-transient

response across the entire output voltage range

without requiring an external compensation network.

Because external compensation is not required, the

device is easy to use and requires few external

components. The device is well-designed for spaceconstrained

data center applications.

The TPS54KB2x device has differential remote sense,

high-performance integrated MOSFETs, and an

accurate ±0.5 reference over the specified operating

junction temperature range. The device features

accurate load regulation and line regulation, Ecomode

or FCCM operation, programmable settings

through the MSEL pin and programmable soft-start.

The TPS54KB2x device is a lead-free device. The

device is RoHS compliant without exemption.