MP1530

Triple Output Step-Up

Plus Linear Regulators for TFT Bias

MP1530 Rev. 1.4

www.MonolithicPower.com

1

5/19/2006

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2006 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP1530 combines a triple output step-up

converter with linear regulators to provide a

complete DC/DC solution. It is designed to

power TFT LCD panels from a regulated 3.3V

or 5V supply.

This

device

integrates

a

1.4MHz

fixed-frequency step-up converter with positive

and negative linear regulators. The step-up

converter switch node drives two charge

pumps, which supply powers to their respective

linear regulators. The positive and negative

linear regulator inputs can withstand up to 38V

and down to -20V, respectively.

A single on/off control enables all 3 outputs.

The outputs are internally sequenced at startup

for ease of use. An internal soft-start prevents

input overload at startup. Cycle-by-cycle current

limiting reduces component stress.

The MP1530 is available in a tiny 3mm x 3mm,

16-pin QFN package or a 16-pin TSSOP

package.

EVALUATION BOARD REFERENCE

Board Number

Dimensions

EV0055

2.4”X x 2.3”Y x 0.4”Z

FEATURES

• 2.7 to 5.5V Operating Input Range

• 2.8A Switch Current Limit

• 3 Outputs In a Single Package

Step-Up Converter up to 22V

Positive 20mA Linear Regulator

Negative 20mA Linear Regulator

• 250mΩ Internal Power MOSFET Switch

• Up to 95% Efficiency

• 1.4MHz Fixed Frequency

• Internal Power-On Sequencing

• Adjustable Soft-Start/Fault Timer

• Cycle-by-Cycle Over Current Protection

• Under Voltage Lockout

• Ready Flag

• 16-Pin, QFN (3mm x 3mm) or TSSOP

Packages

APPLICATIONS

• TFT LCD Displays

• Portable DVD Players

• Tablet PCs

• Car Navigation Displays

“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic

Power Systems, Inc.

TYPICAL APPLICATION

MP1530

SW

CT

IN

PGND

GND

REF

FB3

FB1

FB2

GL

IN2

GH

IN3

COMP

EN

RDY

TO

SW

3.3V/5V

OFF ON

100

90

80

70

60

50

40

30

20

1

10

100

1000

LOAD CURRENT (mA)

Efficiency vs

Load Current

(Step-Up Converter Only)