Power Management
LED Driver ICs
Step-Down (Buck) LED Drivers
Space & Harsh Environment
Extended Temperature Plastic (H & MP)
Extended Temperature (H & MP) LED Drivers
LT3763 - 60V High Current Step-Down LED Driver Controller
Features
- Accurately Control Input and Output Current
- 3000:1 True Color PWM™ Dimming
- ±1.5% Voltage Regulation Accuracy
- ±6% Current Regulation Accuracy
- 6V to 60V Input Voltage Range
- Wide Output Range Up to 55V
- <2µA Shutdown Current
- Control Pin for Thermal Control of Load Current
- Input and Output Current Monitor and Limit
- Open, Short, and C/10 Fault Detection
- PWM Driver Output for LED Applications
- Thermally Enhanced 28-Lead FE Package
Typical Application
Description
The LT3763 is a fixed frequency, synchronous, step-down DC/DC controller designed to accurately regulate output currents up to 20A. The average current mode control- ler will maintain inductor current regulation over a wide output voltage range from 0V to 55V. Output current is set by analog voltages on the CTRL pins and an external sense resistor. Voltage regulation and overvoltage protection are set with a voltage divider from the output to the FB pin. The switching frequency is programmable from 200kHz to 1MHz through an external resistor on the RT pin or with the SYNC pin and an external clock signal. Input and output current sensing provides input current limiting and an accurate measurement of these currents. The FBIN pin is provided for applications requiring a peak power tracking function.
Additional features include an accurate external reference voltage for use with the CTRL pins, an accurate UVLO/EN pin that allows for programmable UVLO hysteresis, a PWM driver for LED applications, output voltage fault detection, and thermal shutdown.
Packaging
For complete and up to date package information and drawings, please refer to our packaging page
TSSOP-28
Order Info
- Part numbers ending in PBF are lead free. Please contact LTC marketing for information on lead based finish parts.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
Package Variations and Pricing
| Part Number | Package | Pins | Temp | Price (1-99) | Price (1k)* | RoHS Data |
|---|---|---|---|---|---|---|
| LT3763EFE#PBF | TSSOP | 28 | E | $6.36 | $4.45 | View |
| LT3763EFE#TRPBF | TSSOP | 28 | E | $4.51 | View | |
| LT3763HFE#PBF | TSSOP | 28 | H | $7.36 | $5.15 | View |
| LT3763HFE#TRPBF | TSSOP | 28 | H | $5.21 | View | |
| LT3763IFE#PBF | TSSOP | 28 | I | $7.00 | $4.90 | View |
| LT3763IFE#TRPBF | TSSOP | 28 | I | $4.96 | View | |
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC1831A | LT3763 Demo Board I High Power Constant Current, Constant Voltage Synchronous Buck Controller | $175.00 | |
| Buy Now | |||
Applications
- High Power Architectural Lighting
- Automotive Lighting
- Aviation and Marine Strobe Lights
- Solar-Powered Chargers, Laser Diodes
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Simulate
LTspice IV is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. To download LTspice IV and other FREE simulation tools, please visit our Design Simulation page.
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Related models available in LTspice IV
LT3763
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
