1

2

3

4

10

9

8

7

HDRV

SW

BOOT

LDRV

ENABLE

FB

COMP

VDD

TPS40192

TPS401923

5

6

BP5

PGD

11

GND

ON/

OFF

External logic

supply 5-V or

less or BP5

Copyright © 2016, Texas Instruments Incorporated

+3.3V

PGD

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Design

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

TPS40192, TPS40193

SLUS719F – MARCH 2007 – REVISED NOVEMBER 2016

TPS4019x 4.5-V to 18-V Input, 10-Pin, Synchronous Buck Controller With Power Good

1

1 Features

1

•

Input Operating Voltage Range: 4.5 V to 18 V

•

Up to 20-A Output Currents

•

Supports Pre-Biased Outputs

•

0.5%, 591-mV Reference

•

Switching Frequency

–

TPS40192: 600 kHz

–

TPS40193: 300 kHz

•

Three Selectable Thermally Compensated Short-

Circuit Protection Levels

•

Hiccup Restart from Faults

•

Internal 5-V Regulator

•

High-Side and Low-Side MOSFET ON-resistance

•

10-Pin 3 mm × 3 mm SON Package

•

Internal 4-ms Soft-Start Time

•

Thermal Shutdown Protection at 145°C

2 Applications

•

Cable Modem CPE

•

Digital Set Top Box

•

Graphics/Audio Cards

•

Entry Level and Mid-Range Servers

3 Description

TPS40192

and

TPS40193

are

cost-optimized

synchronous buck controllers that operate from 4.5 V

to 18 V input. These controllers implement a voltage-

mode

control

architecture

with

the

switching

frequency fixed at either 600 kHz (TPS40192) or 300

kHz (TPS40193). The higher switching frequency

facilitates the use of smaller inductor and output

capacitors, thereby providing a compact power-

supply solution. An adaptive anti-cross conduction

scheme is used to prevent shoot through current in

the power FETs.

Short circuit detection is done by sensing the voltage

drop across the low-side MOSFET when it is on and

comparing it with a user selected threshold of 100

mV, 200 mV or 280 mV. The threshold is set with a

single external resistor connected from COMP to

GND. This resistor is sensed at startup and the

selected threshold is latched. Pulse-by-pulse limiting

(to prevent current runaway) is provided by sensing

the voltage across the high-side MOSFET when it is

on and terminating the cycle when the voltage drop

rises above a fixed threshold of 550 mV. When the

controller

senses

an

output

short

circuit,

both

MOSFETs are turned off and a timeout period is

observed before attempting to restart. This behavior

provides limited power dissipation in the event of a

sustained fault.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

TPS40192

VSON (10)

3.00 mm × 3.00 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Simplified Application Diagram