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.