LT3466
LT3466
PRODUCTIONDual Full Function White LED Step-Up Converter with Built-In Schottky Diodes
- Part Models
- 4
- 1ku List Price
- Starting From $3.78
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Overview
- Drives Up to 20 White LEDs (10 in Series per Converter) from a 3.6V Supply
- Two Independent Step-Up Converters Capable of Driving Asymmetric LED Strings
- Independent Dimming and Shutdown Control of the Two LED Strings
- Internal Schottky Diodes
- Internal Soft-Start Eliminates Inrush Current
- Open LED Protection (39.5V Max VOUT)
- Fixed Frequency Operation Up to 2MHz
- 81% Efficiency Driving 16 White LEDs at 15mA (Eight per Driver) from a 3.6V Supply
- Wide Input Voltage Range: 2.7V to 24V
- Available in 10-Pin DFN and 16-Pin Thermally Enhanced TSSOP Packages
LT3466 is a dual full function step-up DC/DC converter specifically designed to drive up to 20 White LEDs (10 in series per converter) with a constant current. Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminating the need for ballast resistors and expensive factory calibration.
The two independent converters are capable of driving asymmetric LED strings. The dimming of the two LED strings can also be controlled independently. The LT3466 is ideal for providing backlight for main and sub-displays in cell phones and other handheld devices.
The LT3466 operating frequency can be set with an external resistor over a 200kHz to 2MHz range. A low 200mV feedback voltage minimizes power loss in the current setting resistor for better efficiency. Additional features include output voltage limiting when LEDs are disconnected and internal soft-start.
The LT3466 is available in the 10-pin (3mm × 3mm × 0.75mm) DFN and 16-pin thermally enhanced TSSOP packages.
Applications
- Main/Sub Displays
- Digital Cameras, Sub-Notebook PCs
- PDAs, Handheld Computers
- Automotive
Documentation
Data Sheet 1
User Guide 1
Design Note 2
Technical Articles 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LT3466EDD#PBF | 10-Lead DFN (3mm x 3mm w/ EP) | ||
| LT3466EDD#TRPBF | 10-Lead DFN (3mm x 3mm w/ EP) | ||
| LT3466EFE#PBF | 16-Lead TSSOP w/ EP | ||
| LT3466EFE#TRPBF | 16-Lead TSSOP w/ EP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
May 18, 2026 - 26_0072 Epoxy Change for Select TSSOP Products |
||
| LT3466EFE#PBF | PRODUCTION | |
| LT3466EFE#TRPBF | PRODUCTION | |
|
Apr 6, 2022 - 22_0068 Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL |
||
| LT3466EFE#PBF | PRODUCTION | |
| LT3466EFE#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LT3466
- LT3466-1
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
Evaluation Kits
LT3466EDD-1 Demo Board | Boost LED Driver Plus LCD Bias Supply, 2.7V ≤ VIN ≤ 14V, VLED up to 34V @ 15mA, VLCD Bias = ±15V @ 10mA