50

60

70

80

90

100

0

0.5

1

1.5

2

2.5

3

LoadCurrent- A

V

=8V

V

=12V

V

=16V

IN

IN

IN

V

=5V

OUT

1

2

3

4

8

7

6

5

VDD

ISNS

GDRV

GND

RC

SS

COMP

FB

TPS40200

R

SENSE

V

IN

V

OUT

R1

R2

L1

C2

D1

C1

C3

C4

C5

C6

R4

R3

R5

Q1

TPS40200-Q1

www.ti.com

SLUS739D

– SEPTEMBER 2006 – REVISED JULY 2011

WIDE-INPUT-RANGE NONSYNCHRONOUS VOLTAGE-MODE CONTROLLER

Check for Samples: TPS40200-Q1

1

FEATURES

DESCRIPTION

•

Qualified for Automotive Applications

The

TPS40200

is

a

flexible

nonsynchronous

•

Input Voltage Range 4.5 V to 52 V

controller with a built-in 200-mA driver for P-channel

•

FETs. The circuit operates with inputs up to 52 V,

with a power-saving feature that turns off driver

•

200-mA Internal P-FET Driver

current once the external FET has been fully turned

•

Voltage Feed-Forward Compensation

on. This feature extends the flexibility of the device,

•

Undervoltage Lockout (UVLO)

allowing it to operate with an input voltage up to 52 V

without dissipating excessive power. The circuit

•

Programmable Fixed-Frequency

operates

with

voltage-mode

feedback

and

has

(35-kHz to 500-kHz) Operation

feed-forward

input-voltage

compensation

that

•

Programmable Short-Circuit Protection

responds instantly to input voltage change. The

•

Hiccup Overcurrent Fault Recovery

integral

700-mV

reference

is

trimmed

to

2%,

providing

the

means

to

accurately

control

low

•

Programmable Closed Loop Soft Start

voltages. The TPS40200 is available in an 8-pin

•

700-mV 1% Reference Voltage

SOIC and supports many of the features of more

•

External Synchronization

complex controllers. Clock frequency, soft start, and

•

Small 8-Pin SOIC (D) Package

overcurrent limit are each easily programmed by a

single,

external

component.

The

part

has

undervoltage lockout (UVLO) and can be easily

APPLICATIONS

synchronized to other controllers or a system clock to

•

Automotive Controls

satisfy

sequencing

and/or

noise-reduction

•

Distributed Power Systems

requirements.

•

DSL/Cable Modems

Major sections in this data sheet include:

•

Scanners

•

Specifications

•

Telecom

•

General Information

•

Example Applications

•

Design References

TYPICAL APPLICATION

Figure 1. 12-V to 5-V Buck Converter

Figure 2. Typical Efficiency of Application Circuit 1

With 94% Efficiency

(Described in Application 1)

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Copyright

© 2006–2011, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.