1 Features

1• PMBus™ 1.3 Compliant Converters: 35 A

• 2-Device Stackable for up to 70 A With Current

Sharing

• Input Voltage Range: 4.5 V to 18 V

• Output Voltage Range: 0.35 V to 5.5 V

• Integrated 3.2-mΩ and 1.4-mΩ Stacked

NexFET™ Power Stage

• 350-mV to 1650-mV Reference for Adaptive

Voltage Scaling (AVS) Function 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

• Internal Die Temperature Monitoring

• 64 Programmable PMBus Addresses via ADDR0

and ADDR1 Pins

• Programmable via the PMBus Interface:

– OCP, UVLO, Soft-Start, PG, OV, UV, OT

Levels, Fault Responses

– Turnon and Turnoff Delays

• Thermal Shutdown

• Pin Strapping for Switching Frequency: 200 kHz to

1 MHz

• Frequency Synchronization to an External Clock

or Output Clock to Sync Out

• Create a Custom Design Using the TPS546C23

With the WEBENCH® Power Designer

2 Applications

• Test and Instrumentation

• Ethernet Switches, Optical Switches, Routers,

Base Stations

• Servers

• Enterprise Storage SSD

3 Description

The TPS546C23 devices are PMBus 1.3 Compliant,

non-isolated DC/DC converters with integrated FETs,

capable of high-frequency operation and 35-A current

output from a 7-mm × 5-mm package. Two

TPS546C23 devices can be paralleled together to

provide up to 70-A load. Current sensing is realized

by sampling a small portion of the power stage

current and independent on the device temperature.

High-frequency, 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 functions

through VOUT_COMMAND, flexible converter

configuration, as well as key parameters monitoring

including output voltage, current, and internal die

temperature. Response to fault conditions can be set

to either restart, latch-off or ignore depending on

system requirements.