1 Features

1• PMBus 1.2 Compliant Converters: 20 A and 30 A

• Input Voltage Range: 4.5 V to 18 V

• Output Voltage Range: 0.5 V to 5.5 V

• 5 mm × 7 mm LQFN Package

• Single Thermal Pad

• Integrated 5.5-mΩ and 2.0-mΩ Stacked

NexFET™ Power Stage

• 500-mV to 1500-mV Reference for Adapative

Voltage Scaling (AVS) and Margining through

PMBus

• 0.5% Reference Accuracy at 600 mV and Above

• Lossless Low-Side MOSFET Current Sensing

• Voltage Mode Control with Input Feed-Forward

• Differential Remote Sensing

• Monotonic Start-Up into Pre-Biased Output

• Output Voltage and Output Current Reporting

• External Temperature Monitoring with 2N3904

Transistor

• Programmable via the PMBus interface

– VOUT_COMMAND and AVS VOUT Transition

Rate

– Overcurrent Protection with Thermal

Compensation

– UVLO, Soft-Start and Soft-Stop

– PGOOD, OV, UV, OT Levels

– Fault Responses

– Turn-On and Turn-Off Delays

• Thermal Shutdown

• Pin Strapping for Switching Frequency: 200 kHz to

1 MHz

• Frequency Synchronization to an External Clock

• Footprint Compatible 20-A, 30-A Converters

2 Applications

• Test and Instrumentation

• Ethernet Switches, Optical Switches, Routers,

Base Stations

• Servers

• Enterprise Storage SSD

• High-Density Power Solutions

3 Description

The TPS544x25 devices are PMBus 1.2 Compliant,

non-isolated DC-DC converters with integrated FETs,

capable of high-frequency operation and 20-A or 30-A

current output from a 5 mm × 7 mm package. Highfrequency,

low-loss switching, provided by an

integrated NexFET™ power stage and optimized

drivers, allows for very high-density power solutions.

The PMBus interface enables the AVS through

VOUT_COMMAND, flexible converter configuration,

as well as key parameters monitoring including output

voltage, current and an optional external temperature.

Response to fault conditions can be set to either

restart, latch-off or ignore depending on system

requirements.