6

13K

2

VDD

EN/PG

BOOT

UGATE

PHASE

LGATE

GND

7

1

8

5

4

VDD

27K

3-STATE

INPUT

CIRCUIT

PWM

3

SHOOT-

THROUGH

PROTECTION

THERMAL

SD

HLD-OFF

TIME

UVLO

TPS28226

www.ti.com

SLUS791A – JULY 2007 – REVISED SEPTEMBER 2015

7 Detailed Description

7.1 Overview

The TPS28226 features a 3-state PWM input compatible with all multi-phase controllers employing 3-state output

feature. As long as the input stays within 3-state window for the 250-ns hold-off time, the driver switches both

outputs low. This shutdown mode prevents a load from the reversed- output-voltage.

The other features include undervoltage lockout, thermal shutdown and two-way enable/power good signal.

Systems without 3-state featured controllers can use enable/power good input/output to hold both outputs low

during shutting down.

The TPS28226 is offered in an economical SOIC-8 and thermally enhanced low-size Dual Flat No-Lead (DFN-8)

packages. The driver is specified in the extended temperature range of –40°C to 125°C with the absolute

maximum junction temperature 150°C.

7.2 Functional Block Diagram

For the TPS28226DRB the thermal PAD on the bottom side of package must be soldered and connected to the GND

pin and to the GND plane of the PCB in the shortest possible way.

Copyright © 2007–2015, Texas Instruments Incorporated

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Product Folder Links: TPS28226