50

55

60

65

70

75

80

85

90

95

100

0

4

8

12

16

20

Output Current (A)

PVIN = 3.3 V, VIN = 5 V

PVIN = VIN = 5 V

PVIN = VIN = 12 V

C001

Vout = 1.8 V

Fsw = 500 kHz

VOUT

AGND

SENSE+

LMZ31520

FREQ_SEL

SS_SEL

V5V

VIN

VIN

VOUT

PGND

VADJ

ILIM

INH

PWRGD

PVIN

LMZ31520

www.ti.com

SLVSBM9B – OCTOBER 2013 – REVISED DECEMBER 2013

20A SIMPLE SWITCHER® Power Module with 3.0V-14.5V Input in QFN Package

Check for Samples: LMZ31520

1

FEATURES

DESCRIPTION

2

•

Complete Integrated Power Solution;

The LMZ31520 SIMPLE SWITCHER® power module

Smaller than a Discrete Design

is an easy-to-use integrated power solution that

•

15 mm × 16 mm × 5.8 mm Package Size

combines a 20-A DC/DC converter with power

- Pin Compatible with LMZ31530

MOSFETs, a shielded inductor, and passives into a

•

Ultra-Fast Load Step Response

low profile, QFN package. This total power solution

allows as few as three external components and

•

Efficiencies Up To 96%

eliminates the loop compensation and magnetics part

•

Wide-Output Voltage Adjust

selection process.

0.6 V to 3.6 V, with 1% Reference Accuracy

The 15x16x5.8 mm QFN package is easy to solder

•

Optional Split Power Rails Allows

onto a printed circuit board and allows a compact

Input Voltage Down to 3.0 V

point-of-load design. Achieves greater than 95%

•

Selectable Switching Frequency

efficiency, has ultra-fast load step response and

(300 kHz to 850 kHz)

excellent power dissipation capability with a thermal

impedance of 8.6°C/W. The LMZ31520 offers the

•

Selectable Slow-Start

flexibility and the feature-set of a discrete point-of-

•

Adjustable Overcurrent Limit

load design and is ideal for powering a wide range of

•

Power Good Output

ICs and systems. Advanced packaging technology

affords

a

robust

and

reliable

power

solution

•

Output Voltage Sequencing

compatible with standard QFN mounting and testing

•

Over Temperature Protection

techniques.

•

Pre-bias Output Start-up

SIMPLIFIED APPLICATION

•

Operating Temperature Range: –40°C to 85°C

•

Enhanced Thermal Performance: 8.6°C/W

•

Meets EN55022 Class A Emissions

- Integrated Shielded Inductor

APPLICATIONS

•

Broadband and Communications

Infrastructure

•

DSP and FPGA Point of Load Applications

•

High Density Power Systems

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.

2

is a trademark of ~ Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright © 2013, 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.