1

®

FN7370.1

ISL97631

White LED Boost Regulator With

Integrated Schottky Diode

The ISL97631 represents a high efficiency, constant

frequency PWM regulator with integrated boost diode and

FET. Designed for use in white LED driving applications, the

ISL97631 features efficiencies up to 85%. It operates at

1.35MHz switching frequency and operates from an input

voltage of between 2.7V and 5.5V. The maximum output

voltage of 27V enables the ISL97631 to drive up to 6 LEDs in

series. It is also possible to use the ISL97631 to drive LEDs

in series/parallel combination for applications requiring up to

15 LEDs.

Available in the 6 Ld TSOT package, the ISL97631 offers

high efficiency, constant frequency operation. It is specified

for operation over the -40°C to +85°C ambient temperature

range.

Pinout

ISL97631

(6 LD TSOT)

TOP VIEW

Features

• Up to 6 LEDs in series

• 27V maximum output

• 2.7V to 5.5V input

• Up to 85% efficient

• 1.35MHz constant frequency

• Enable/PWM dimming control

• Pb-free plus anneal available (RoHS compliant)

Applications

• LED backlighting

• Cell phones

•PDAs

• Handheld games

• MP3 players

•GPS

• Other handheld devices

1

2

3

6

4

VOUT

GND

LX

VIN

ENAB

5FB

Ordering Information

PART NUMBER

PART

MARKING

PCS.

TAPE &

REEL

PACKAGE

(TAPE AND REEL)

PKG. DWG. #

ISL97631IHTZ-T7 (See Note)

631Z

3,000

7”

6 Ld TSOT (Pb-free)

MDP0049

ISL97631IHTZ-T7A (See Note)

631Z

270

7”

6 Ld TSOT (Pb-free)

MDP0049

NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate

termination finish, which are 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

December 21, 2005

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

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Copyright Intersil Americas Inc. 2005. All Rights Reserved

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