1 Features

? Up to 96% efficiency

? Excellent thermal performance

? I2C-compatible interface up to 3.4Mbps

? 1% output voltage accuracy

? DCS-Control topology for fast transient response

? I2C Programmable:

– Output voltage

? 0.4 – 1.675V in 5mV steps

? 0.8 – 3.35V in 10mV steps

– Forced PWM or power save mode

– Output voltage discharge

? I2C device status readback of:

– Thermal warning

– Hiccup current limit

– Vin below UVLO

? Resistor selectable:

– I2C address

– 16 start-up output voltage options

? Optimized for low EMI requirements

– No bond wire package

– MagPack technology shields inductor and IC

– Simplified layout through optimized pinout

? 4μA operating quiescent current

? –40°C to 125°C operating temperature range

? 2.3mm × 3.0mm × 1.95mm QFN package

? 28mm2 design size

? Also available without I2C interface: TPSM82866A

2 Applications

? Core supply for FPGAs, CPUs, ASICs

? Optical modules

? Medical imaging

? Factory automation and control

? Aerospace and defense

3 Description

The TPSM8286xx device family consists of 4A and

6A step-down converter power modules designed for

small solution size and high efficiency. The power

modules uses TI's MagPack technology to integrate

a synchronous step-down converter and an inductor

to simplify design, reduce external components, and

save PCB area. The compact design is excellent

for automated assembly by standard surface mount

equipment. Tight output voltage accuracy, even with

small output capacitors, is achieved though the

DCS-Control architecture and the excellent load

transient performance. At medium-to-heavy loads, the

converter operates in PWM mode and automatically

enters power save mode operation at light load to

maintain high efficiency over the entire load current

range. The devices can also be forced in PWM mode

operation for the smallest output voltage ripple. The

I2C interface provides an effective way of adjusting

the output voltage, setting the VOUT ramp rate when

transitioning to a new setpoint or reading status

information like thermal warning or current limit flags.

An integrated soft start reduces the inrush current

required from the input supply. Overtemperature

protection and hiccup short-circuit protection deliver

a robust and reliable design.