1

®

FN6439.4

ISL97656

Integrated 4A Switch PWM Step-Up

Regulator

The ISL97656 is a high frequency, high efficiency step-up

voltage regulator operated at constant frequency PWM

mode. With an internal 4.0A, 120m

Ω MOSFET, it can deliver

up to 2A output current at over 90% efficiency. The

selectable 640kHz and 1.2MHz allows smaller inductors and

faster transient response. An external compensation pin

gives the user greater flexibility in setting frequency

compensation allowing the use of low ESR Ceramic output

capacitors.

When shut down, it draws <1µA of current and can operate

down to 2.3V input supply. These features along with

1.2MHz switching frequency makes it an ideal device for

portable equipment and TFT-LCD displays.

The ISL97656 is available in a 10 Ld TDFN package with a

maximum height of 1.1mm. The device is specified for

operation over the full -40°C to +85°C temperature range.

Pinout

ISL97656

(10 LD TDFN)

TOP VIEW

Features

• >90% Efficiency

• 4.0A, 120m

Ω Power MOSFET

• 2.3V to 6.0V Input

• Up to 24V Output

• 640kHz/1.2MHz Switching Frequency Selection

• Adjustable Soft-Start

• Internal Thermal Protection

• 0.8mm Max Height 10 Ld TDFN Package

• Pb-Free (RoHS Compliant)

• Halogen Free

Applications

• TFT-LCD Displays

• DSL Modems

• PCMCIA Cards

• Digital Cameras

• GSM/CDMA Phones

• Portable Equipment

• Handheld Devices

2

3

4

1

9

8

7

10

COMP

FB

EN

GND

SS

FREQ

IN

LX

5

6

LX

GND

Ordering Information

PART

NUMBER

(Note)

PART

MARKING

PACKAGE

(Pb-Free)

PKG.

DWG. #

ISL97656IRTZ

656Z

10 Ld TDFN

L10.3x3B

ISL97656IRTZ-T*

656Z

10 Ld TDFN

L10.3x3B

ISL97656IRTZ-TK*

656Z

10 Ld TDFN

L10.3x3B

*Please refer to TB347 for details on reel specifications.

NOTE: These Intersil Pb-free plastic packaged products employ

special Pb-free material sets, molding compounds/die attach

materials, and 100% matte tin plate plus anneal (e3 termination

finish, which is RoHS compliant and 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-020.

Data Sheet

April 2, 2010

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

1-888-INTERSIL or 1-888-468-3774

Copyright Intersil Americas Inc. 2007-2010. All Rights Reserved

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