1 Features
• New product available: TPS548B28 16-V, 20-A
synchronous-buck converter with remote sense
• Conversion input voltage range: 1.5 V to 15 V
• VDD input voltage range: 4.5 V to 25 V
• 92% efficiency from 12 V to 1.5 V at 20 A
• Output voltage range: 0.6 V to 5.5 V
• 5-V LDO output
• Supports single-rail input
• Integrated power MOSFETs with 20 A of
continuous output current
• Auto-skip Eco-mode™ for light-load efficiency
• < 10-μA shutdown current
• D-CAP™ mode with fast transient response
• Selectable switching frequency from 250 kHz to 1
MHz with external resistor
• Selectable auto-skip or PWM-only operation
• Built-in 1% 0.6-V reference
• 0.7-ms, 1.4-ms, 2.8-ms, and 5.6-ms selectable
internal voltage servo soft start
• Integrated boost switch
• Precharged start-up capability
• Adjustable overcurrent limit with thermal
compensation
• Overvoltage, undervoltage, UVLO, and
overtemperature protection
• Supports all ceramic output capacitors
• Open-drain power-good indication
• Incorporates NexFET™ power block technology
• 22-pin QFN package with PowerPAD™
• For SWIFT™ power products documentation, see
http://www.ti.com/swift

2 Applications
• Enterprise rack Servers and storage
• Wired networking switches and routers
• ASIC, SoC, FPGA, DSP core, and I/O voltage

3 Description
TPS53353 is a D-CAP™ mode, 20-A synchronous
switcher with integrated MOSFETs. It is designed
for ease of use, low external component count, and
space-conscious power systems.
This device features 5.5-mΩ / 2.2-mΩ integrated
MOSFETs, accurate 1%, 0.6-V reference, and
integrated boost switch. A sample of competitive
features include: a conversion input voltage range
from 1.5 V to 15 V, very low external component
count, D-CAP™ mode control for super fast transient,
auto-skip mode operation, internal soft-start control,
selectable frequency, and no need for compensation.
The conversion input voltage ranges from 1.5 V to 15
V, the supply voltage range is from 4.5 V to 25 V, and
the output voltage range is from 0.6 V to 5.5 V.
The device is available in 5-mm × 6-mm, 22-pin QFN
package and is specified from –40°C to 85°C.
The TPS548B28 is a newer 20A device designed
for data center applications with a smaller, Pb-free
package.