LP8728

FB_B1

SW_B1

FB_B2

SW_B2

FB_B3

SW_B3

FB_B4

SW_B4

1.5 H

EN_B1

EN_B2

EN_B3

EN_B4

PG_B1

PG_B2

PG_B3

PG_B4

Micro

Controller

DEFSEL

AVDD

BYP

VIN_B1

VIN_B2

VIN_B3

VIN_B4

VDDIO

1 F

1 F

10 F

1.5 H

1.5 H

1.5 H

10 F

10 F

10 F

10 F

10 F

10 F

10 F

LP8728-Q1

www.ti.com

SNVS972 – AUGUST 2013

LP8728-Q1 Quad-Output Step-Down DC/DC Converter

Check for Samples: LP8728-Q1

1

FEATURES

APPLICATIONS

•

LP8728-Q1 is an Automotive Grade Product

•

FPGA, DSP Core Power

that is AECQ-100 Grade 1 Qualified

•

Processor Power for Mobile Devices

•

Four High Efficiency Step-Down DC/DC

•

Peripheral I/O Power

Converters:

•

Automotive Safety Cameras

–

•

Automotive Infotainment

–

Max Output Current 1.0A

–

Forced PWM Operation

DESCRIPTION

The LP8728-Q1 is a quad-output Power Management

–

Soft-Start Control

Unit,

optimized

for

low-power

FPGAs,

–

microprocessors, and DSPs. This device integrates

–

four highly efficient step-down DC/DC converters into

one package. All the converters operate above the

–

AM band with a fixed 3.2 MHz switching frequency.

–

Each buck converter's high-side switch turn-on time is

•

Separate Enable Inputs for each Converter

phase shifted to minimize input current spikes.

Control

The protection features include output short-circuit

•

Separate Power Good Outputs for each

protection, switch current limits, input over-voltage

Converter

protection, input under-voltage lockout, and thermal

•

Output Over-Current and Input Over-Voltage

shutdown

functions.

During

startup,

the

device

Protection

controls the output slew rate to minimize output

voltage overshoot and the input inrush current.

•

Over-Temperature Protection

The device comes in a 5 x 5 x 0.8 mm 28-pin QFN

•

Under-Voltage Lockout (UVLO)

package with 0.5 mm pitch.

•

28-pin 0.5 mm Pitch QFN Package

TYPICAL APPLICATION CIRCUIT

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 © 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.