LINEAR TECHNOLOGY LT3465 LT3465A Data Sheet Manual
Summary
The LT3465/LT3465A is a specialized step-up DC/DC converter designed for driving multiple white LEDs from low voltage sources like Li-Ion batteries. This compact driver features an integrated Schottky diode and inherent LED current matching, boosting efficiency while simplifying system design by eliminating the need for external components. Ideal for portable electronics such as digital cameras, MP3 players, or cellular devices, the manual provides comprehensive details on operational parameters, high-speed switching (1.2MHz or 2.4MHz), protection features, and optimal integration guidelines.
Page 1 Text Content
LT3465/LT3465A 1.2MHz/2.4MHz White LED Drivers with Built-in Schottky in Thin SOT
FEATURES DESCRIPTIO
Inherently Matched LED Current The LT®3465/LT3465A are step-up DC/DC converters Drives Up to Six LEDs from a 3.6V Supply designed to drive up to six LEDs in series from a Li-Ion cell. No External Schottky Diode Required Series connection of the LEDs provides identical LED 1.2MHz Switching Frequency (LT3465) currents and eliminates the need for ballast resistors. 2.4MHz Switching Frequency Above AM Broadcast These devices integrate the Schottky diode required exter- Band (LT3465A) nally on competing devices. Additional features include VIN Range: 2.7V to 16V output voltage limiting when LEDs are disconnected, one- VOUT(MAX) = 30V pin shutdown and dimming control. The LT3465 has Automatic Soft-Start (LT3465) internal soft-start. Open LED Protection
The LT3465 switches at 1.2MHz, allowing the use of tiny
High Efficiency: 81% (LT3465) 79% (LT3465A)
external components. The faster LT3465A switches at
Typical EF FI CI EN CY
2.4MHz. Constant frequency switching results in low input
Requires Only 0.22µF Output Capacitor
noise and a small output capacitor. Just 0.22µF is required
Low Profile (1mm) SOT-23
for 3-, 4- or 5-LED applications. APPLICATIO The LT3465 and LT3465A are available in the low profile (1mm) 6-lead SOT-23 (Thin SOTTM) package.
Cellular Phones
, LTC and LT are registered trademarks of Linear Technology Corporation. Thin SOT is a PDAs, Handheld Computers trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners.
Digital Cameras MP3 Players GPS Receivers
TYPICAL APPLICATIO
Conversion Efficiency
L1 22µH VIN = 3.6V
3V TO 5V 4 LEDs
SW VOUT VIN
C1 LT3465/ C2 1µF LT3465A 0.22µF
SHUTDOWN
AND DIMMING CTRL FB
CONTROL GND
C1, C2: X5R OR X7R DIELECTRIC
LT3465
L1: MURATA LQH32CN220
LT3465A
Figure 1. Li-Ion Powered Driver for Four White LEDs
LED CURRENT (m A)
3465afa
Page Summary Contents For LINEAR TECHNOLOGY LT3465 LT3465A Data Sheet Manual
Manual Details
| Brand | Linear |
|---|---|
| Pages | 16 |
| File Size | 334.47 KB |
| Published | June 01, 2026 |
Enter the captcha to get the download link:
Frequently Asked Questions
Is an external Schottky diode required for the LT3465/LT3465A?
No, these devices integrate the Schottky diode required externally on competing standalone devices.
What is the primary advantage of the faster LT3465A at 2.4MHz?
The faster LT3465A switches at a typical 2.4MHz, which eliminates the need for ballast resistors and allows use of tiny LEDs.
What protection features does the LT3465 offer?
It offers Open LED Protection, Automatic Soft-Start, and voltage limiting (V Range: 2.7V to 16V).
Does the device require a large output capacitor?
No, only 0.22µF is required for the output capacitor, along with low input noise.