PH

GND

BOOT

EN

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TPS54335A

RT

R

C

R

RT

C

BOOT

C

O

L

O

R

O1

R

O2

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VIN

C

1

C

C

C

2

R

C

C

SS

C

C

C

BOOT

C

O

L

O

R

O1

R

O2

C

2

C

1

PH

GND

BOOT

EN

VSENSE

COMP

TPS54336A

SS

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TPS54335A, TPS54335-1A, TPS54336A

SLVSCD5C – NOVEMBER 2014 – REVISED JULY 2015

TPS5433xA 4.5- to 28-V Input, 3-A Output, Synchronous SWIFT™

Step-Down DC-DC Converter

1 Features

3 Description

The TPS5433xA family of devices are synchronous

1

•

Synchronous 128-m

Ω and 84-mΩ MOSFETs for

converters with an input-voltage range of 4.5 to 28 V.

3-A Continuous Output Current

These

devices

include

an

integrated

low-side

•

TPS54335A: Internal 2-ms Soft-Start,

switching FET that eliminates the need for an

50-kHz to 1.5-MHz Adjustable Frequency

external diode which reduces component count.

•

TPS54336A: Adjustable Soft-Start,

Efficiency is maximized through the integrated 128-

Fixed 340-kHz Frequency

m

•

Low 2-µA Shutdown, Quiescent Current

at light loads. Using the enable pin, the shutdown

supply current is reduced to 2

μA. This step-down

•

0.8-V Voltage Reference with ±0.8% Accuracy

(buck) converter provides accurate regulation for a

•

Current Mode Control

variety

of

loads

with

a

well-regulated

voltage

•

Monotonic Startup into Pre-Biased Outputs

reference that is 1.5% over temperature.

•

Pulse Skipping for Light-Load Efficiency

Cycle-by-cycle

current

limiting

on

the

high-side

•

Hiccup Mode Overcurrent Protection

MOSFET protects the TPS5433xA family of devices

in overload situations and is enhanced by a low-side

•

Thermal Shutdown (TSD) and

sourcing

current

limit

which

prevents

current

Overvoltage Transition Protection

runaway. A low-side sinking current-limit turns off the

•

8-Pin SO PowerPAD™ and 10-Pin VSON

low-side MOSFET to prevent excessive reverse

Packages

current.

Hiccup

protection

is

triggered

if

the

overcurrent condition continues for longer than the

2 Applications

preset time. Thermal shutdown disables the device

when the die temperature exceeds the threshold and

•

Consumer Applications such as a Digital TV

enables the device again after the built-in thermal

(DTV), Set Top Box (STB, DVD/Blu-ray Player),

hiccup time.

LCD Display, CPE (Cable Modem, WiFi Router),

DLP Projectors, Smart Meters

Device Information(1)

•

Battery Chargers

PART NUMBER

PACKAGE

BODY SIZE (NOM)

•

Industrial and Car Audio Power Supplies

SO PowerPAD (8)

4.89 mm × 3.90 mm

TPS54335A

•

5-V, 12-V, and 24-V Distributed Power Bus Supply

TPS54336A

VSON (10)

3.00 mm × 3.00 mm

TPS54335-1A

VSON (10)(2)

3.00 mm × 3.00 mm

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

the end of the datasheet.

(2) The DRC package for the TPS54335-1A device has a

narrower heat-pad for more clearance between the pins and

heat pad. See the Differences Between the Two DRC

Packages section.

4 Simplified Schematic

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.