1 Features

• –55°C to 125°C operating temperature range

• ±1.0% output voltage accuracy

• Differential remote sensing

• Parallelable for multi-phase operation

• Start-up output voltage selectable in 50mV steps

from 0.40V to 3.35V through VSETx pins and I2C

adjustable in 1.25mV steps

• Five selectable I2C addresses through VSETx pins

• Adjustable external compensation for wide output

capacitor range and optimized transient response

• Designed for low EMI requirements

– No bond wire package

– Internal input capacitors

– Simplified layout through parallel input path

– Optional synchronization to external clock or

spread-spectrum operation

• Power save mode or forced-PWM operation

• Precise enable input threshold

• Power-good output with window comparator

• Active output discharge

• Excellent thermal performance

• 4.5mm × 6.8mm QFN package with 0.5mm pitch

• 77mm2 design size

2 Applications

• Aircraft electrical power

• Defense radio

• Seeker front end

• Radar

• Rail transport

3 Description

The TPSM8287A1xM is a family of pin-to-pin, stepdown,

DC/DC power modules with differential remote

sensing and I2C interface. The power modules

integrate a synchronous step-down converter, an

inductor and input capacitors to simplify design,

reduce external components, and save PCB area.

The low-profile and compact design is designed for

assembly by standard surface mount equipment.

The TPSM8287A1xM family implements an enhanced

control scheme that supports fast transients. The

TPSM8287A1xM can operate in fixed-frequency or

power save mode. The remote sensing feature

optimizes voltage regulation at the point-of-load and

the device achieves ±1.0% DC voltage accuracy

over the entire temperature range. The devices can

operate in stacked, paralleled mode to deliver higher

output currents or to spread the power dissipation

across multiple devices. The I2C-compatible interface

offers several control, monitoring and warning

features. The start-up voltage is selectable through

the VSETx pins to allow a power-up without an active

I2C communication.