描述 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.

特性 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