Intel ISL97631 Data Sheet
Summary
This constant frequency PWM boost regulator is ideal for designers requiring high-efficiency white LED driving, particularly within battery-powered and hand-held electronics. It features an integrated Schottky diode and can reliably drive up to six (or expandable up to fifteen) LEDs using a low input voltage (2.7V to 5.5V). The accompanying technical specifications provide essential details on operation over wide temperature ranges and guide implementation for portable devices, including cell phones, MP3 players, and PDA units.
Page 1 Text Content
ISL97631
December 21, 2005 FN7370.1Data Sheet
White LED Boost Regulator With Features Integrated Schottky Diode
Up to 6 LEDs in series
The ISL97631 represents a high efficiency, constant
27V maximum output
frequency PWM regulator with integrated boost diode and
FET. Designed for use in white LED driving applications, the 2.7V to 5.5V input
ISL97631 features efficiencies up to 85%. It operates at
Up to 85% efficient
1.35MHz switching frequency and operates from an input
1.35MHz constant frequency
voltage of between 2.7V and 5.5V. The maximum output voltage of 27V enables the ISL97631 to drive up to 6 LEDs in Enable/PWM dimming control series. It is also possible to use the ISL97631 to drive LEDs
Pb-free plus anneal available (Ro HS compliant)
in series/parallel combination for applications requiring up to 15 LEDs.
Applications
Available in the 6 Ld TSOT package, the ISL97631 offers
LED backlighting
high efficiency, constant frequency operation. It is specified
Cell phones
for operation over the -40°C to +85°C ambient temperature range. PDAs
Handheld games
Pinout
ISL97631 MP3 players
(6 LD TSOT)
TOP VIEW
Other handheld devices
VOUT VIN
www.BDTIC.com/Intersil GND FB LX ENAB
Ordering Information
PART TAPE & PACKAGE
PART NUMBER MARKING PCS. REEL (TAPE AND REEL) PKG. DWG. #
ISL97631IHTZ-T7 (See Note) 631Z 3,000 7” 6 Ld TSOT (Pb-free) MDP0049
ISL97631IHTZ-T7A (See Note) 631Z 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 Ro HS compliant and compatible with both Sn Pb 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.
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
Page Summary Contents For Intel ISL97631 Data Sheet
Manual Details
| Brand | Intel |
|---|---|
| Pages | 8 |
| File Size | 316.85 KB |
| Published | May 30, 2026 |
Enter the captcha to get the download link:
Frequently Asked Questions
What is the maximum number of LEDs this regulator can drive?
It features up to 6 LEDs in series but can also be used in combination for applications requiring up to 15 LEDs.
What are the recommended PCB layout guidelines for optimal operation?
The R component should be near the FB SET and GND pins, and voltage decoupling/output filter caps must be close to their respective V and V pins.
What is the specified operating temperature range?
The ISL97631 operates over an ambient temperature range of -40°C to +85°C Celsius.
How is dimming control achieved with this device?
The device features Enable/PWM dimming control and supports both series and parallel combinations for flexible LED driving.