1

®

FN7100.4

EL7581

3-Channel DC-DC Converter

The EL7581 is a 3-channel DC-DC

converter IC which is designed

primarily for use in TFT/LCD

applications. It features a PWM boost converter with 2.7V to

14V input capability and 5V to 17V output, which powers the

column drivers and provides up to 720mA @12V, 570mA @

15V from 5V input. A pair of charge pump control circuits

to 40V and -5V to -40V, respectively, each at up to 60mA.

The EL7581 features adjustable switching frequency,

control to allow selection of supply start-up sequence. An

over-temperature feature is provided to allow the IC to be

automatically protected from excessive power dissipation.

The EL7581 is available in a 20-pin HTSSOP package and

is specified for operation over the full -40°C to +85°C

temperature range.

Features

• TFT/LCD display supply

- Boost regulator

• High frequency, small inductor DC-DC boost circuit

• Over 90% efficient DC-DC boost converter capability

• Adjustable frequency

• Adjustable soft-start

• Adjustable outputs

• Small parts count

Applications

• TFT-LCD panels

•PDAs

Pinout

EL7581

(20-PIN HTSSOP)

TOP VIEW

Ordering Information

PART

NUMBER

PACKAGE

TAPE &

REEL

PKG. DWG. #

EL7581IRE

20-Pin HTSSOP

-

MDP0048

EL7581IRE-T7

20-Pin HTSSOP

7”

MDP0048

EL7581IRE-T13

20-Pin HTSSOP

13”

MDP0048

EL7581IREZ

(Note)

20-Pin HTSSOP

(Pb-Free)

-

MDP0048

EL7581IREZ-T7

(Note)

20-Pin HTSSOP

(Pb-Free)

7”

MDP0048

EL7581IREZ-T13

(Note)

20-Pin HTSSOP

(Pb-Free)

13”

MDP0048

NOTE: Intersil Pb-Free products employ special Pb-free material

sets; molding compounds/die attach materials and 100% matte tin

plate termination finish, which is compatible with both SnPb and Pb-

free soldering operations. Intersil Pb-Free products are MSL

classified at Pb-free peak reflow temperatures that meet or exceed

the Pb-free requirements of IPC/JEDEC J Std-020B.

THERMAL

PAD*

ROSC

ENP

ENBN

VREF

PGND

PGND

DRVP

VDDP

FBP

VSSP

VSSB

SS

FBB

VDDB

LX

LX

LX

DRVN

VDDN

FBN

*Refer to PCB layout guideline.

1

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5

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9

10

20

19

18

17

16

15

14

13

12

11

Data Sheet

April 16, 2004

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 321-724-7143

Copyright © Intersil Americas Inc. 2004. All Rights Reserved. Elantec is a registered trademark of Elantec Semiconductor, Inc.

All other trademarks mentioned are the property of their respective owners.