4V to 16V input 25A 4x stackable PMBus® power module with extended security

TPSM8S6B24S is a highly integrated, easy-to-use, non-isolated

DC/DC buck power module with added manufacturer-specific PMBus commands. The addition of

EXTENDEDWRITEPROTECT and PASSKEY improves security against malicious access to the PMBus by restricting

Write capability with greater resolution than the standard Write Protect command.

TPSM8S6B24S is

a

25A power module and can source up to 100A with 4

× stackability. The device has an option to overdrive the internal 5V LDO with an external

5V supply to enable lower input voltage range down to 2.95V and improve the efficiency of

the converter.

TPSM8S6B24S

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 1MHz clock support

to provide 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. Back-channel communication between stacked devices enables

all TPSM8S6B24S converters, powering a single output rail to

share a single address to simplify system software, firmware design. Key parameters

including output voltage, switching frequency, soft-start time, and overcurrent fault limits

can also be configured through BOM selection without PMBus communication to support program

free power up.