1 Features

• 4V to 16V input voltage range

• 3.1V to 5.3V external VCC bias support

• 8.4mΩ and 3.3mΩ MOSFETs (VVCC = 3.3V)

• 20A continuous output current

• Optimized 19-pin WQFN-HR package for efficiency

and thermal performance

• ±1.25% output voltage accuracy with internal

feedback, TJ = –40°C to +150°C

• 0.5V to 5.5V 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 valley current limit

• 600kHz, 800kHz, 1.0MHz, 1.2MHz selectable

switching frequency

• Programmable soft-start time

• Prebiased start-up capability

• Open-drain power-good output

• Overvoltage and undervoltage fault protection

• 3mm × 3mm (0.4mm pin pitch), 19-pin QFN

package

• Pin-to-pin compatible with 12A TPS548A23

2 Applications

• Rack server and blade server

• Data center switches

• Wireless infrastructure

3 Description

The TPS548B23 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 TPS548B23 device has differential remote

sense, high-performance integrated MOSFETs, a

±1.0% reference voltage for external feedback, and

supports ±1.25% output voltage accuracy with internal

reference. The device features accurate load and

line regulation and Eco-mode or Forced Continuous

Conduction Mode (FCCM) operation. Pin strap

options allow for configuration of the overcurrent limit,

fault response, internal or external feedback, output

voltage selection, switching frequency, and soft-start

time.

The internal 3.0V LDO can be over-driven with an

external 3.1V to 5.3V supply through the VCC pin to

improve efficiency and reduce power dissipation.

The TPS548B23 device is a lead-free device. The

device is RoHS compliant without exemption.