1 Features

? 4.25 V to 16 V with PVIN tied to AVIN with internal

LDO

? 2.95 V to 16 V with PVIN and AVIN split rail, or

with external bias on VDD5

? Integrated MOSFETs, inductors, and basic

passives

? Average current mode control with selectable

internal compensation

? 0.5-V to 5.5-V output voltage range from through

pinstrap

? 0.25-V to 5.5-V PMBus? VOUT_COMMAND range

? Extensive PMBus command set with telemetry for

VOUT, IOUT, and die temperature

? Differential remote sensing with an internal FB

divider for < 1 VOUT error

? –40°C to +125°C junction temperature range

? AVS and margining capabilities through PMBus

? Multi-function select (MSEL) pins for pinstrap

programming PMBus defaults

? Nine selectable switching frequencies from

275 kHz to 1.1 MHz

? Frequency sync in and sync out

? Supports prebiased output

? 16-mm × 20-mm × 4.3-mm, 59-pin MOW package

? Create a custom design using the TPSM8D6B24

with the WEBENCH? Power Designer

2 Applications

? Data center switches, rack servers

? Active antenna system, remote radio, and

baseband unit

? Automated test equipment, CT, PET, and MRI

? ASIC, SoC, FPGA, DSP core, and I/O voltage

3 Description

The TPSM8D6B24 is a highly integrated, easy-touse,

non-isolated DC/DC buck power module. The

TPSM8D6B24 provides two 25-A independent outputs

or a single stacked 2-phase 50-A output. The device

has an option to overdrive the internal 5-V LDO with

an external 5-V supply to enable a lower input voltage

range down to 2.95 V and improve the efficiency of

the converter.

The TPSM8D6B24 power module uses a proprietary

fixed-frequency current-mode control with input

feedforward and selectable internal compensation

components for minimal size and stability over a wide

range of output capacitances.

The PMBus interface with 1-MHz clock support

provides a convenient, standardized digital interface

for converter configuration as well as monitoring

of key parameters including output voltage, output

current, and internal die temperature. Response to

fault conditions can be set to restart, latch off, or

ignore, depending on system requirements. Backchannel

communication between stacked devices

enables all TPSM8D6B24 converters, powering a

single output rail to share a single address to simplify

system software or firmware design. Key parameters

including output voltage, switching frequency, softstart

time, and overcurrent fault limits can also be

configured through BOM selection without PMBus

communication to support program free power up.