5

4

3

2

6

7

8

9

BOOT

HDRV

SW

LDRV/OC

FB

COMP

PGOOD

EN/SS

TPS4030x

1

10

BP

VDD

PAD

V

IN

SD

V

OUT

V

IN

UDG-09158

V

OUT

GND

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Folder

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TPS40303, TPS40304, TPS40305

SLUS964B – NOVEMBER 2009 – REVISED MAY 2015

TPS4030x 3-V to 20-V Input Synchronous Buck Controller

1 Features

3 Description

The

TPS4030x

is

a

family

of

cost-optimized

1

•

Input Voltage Range From 3 V to 20 V

synchronous buck controllers that operate from 3-V to

•

300-kHz (TPS40303), 600-kHz (TPS40304), and

20-V input. The controller implements a voltage-mode

1.2-MHz (TPS40305) Switching Frequencies

control architecture with input-voltage feed-forward

•

compensation that responds instantly to a change in

input voltage. The switching frequency is fixed at 300

•

Programmable Thermally Compensated OCP

kHz, 600 kHz, or 1.2 MHz.

Levels

The Frequency Spread Spectrum (FSS) feature adds

•

Programmable Soft-Start

to the switching frequency, significantly reducing the

•

600-mV, 1% Reference Voltage

peak EMI noise and making it much easier to comply

•

Voltage Feed-Forward Compensation

with EMI standards.

•

Supports Prebiased Output

The TPS4030x offers design with a variety of user-

•

Frequency Spread Spectrum

programmable

functions,

including

soft-start,

•

Thermal Shutdown Protection at 145°C

overcurrent

protection

(OCP)

levels,

and

loop

compensation.

•

10-Pin 3-mm × 3-mm SON Package With Ground

Connection to Thermal Pad

OCP level may be programmed by a single external

resistor connected from the LDRV pin to circuit

ground. During initial power on, the TPS4030x enters

2 Applications

a calibration cycle, measures the voltage at the LDRV

•

POL Modules

pin, and sets an internal OCP voltage level. During

•

Printers

operation, the programmed OCP voltage level is

compared to the voltage drop across the low-side

•

Digital TVs

FET when it is on to determine whether there is an

•

Telecom

overcurrent condition. The TPS4030x then enters a

shutdown and restart cycle until the fault is removed.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

TPS40303

TPS40304

VSON (10)

3.00 mm × 3.00 mm

TPS40305

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

the end of the data sheet.

Simplified Application Diagram

1

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.