LT3479
PRODUCTION3A, Full Featured DC/DC Converter with Soft-Start and Inrush Current Protection
- Part Models
- 4
- 1ku List Price
- Starting From $5.12
Overview
- Wide Input Voltage Range: 2.5V to 24V
- 3A, 42V Internal Switch
- High Efficiency Power Conversion: Up to 89%
- Soft-Start
- Frequency Set by External Resistor: 200kHz to 3.5MHz
- Protection Against Input Short Circuits and Hot Plugging
- Low VCESAT Switch: 0.3V at 2.5A (Typical)
- Capable of Positive and Negative Outputs
- Available in Thermally Enhanced 14-Lead (4mm × 3mm) DFN and 16-Lead TSSOP Packages
The LT3479 is a current mode, fixed frequency step-up DC/DC converter with an internal 3A, 42V switch. Efficiencies of up to 89% can be achieved in typical applications. It features a programmable soft-start function to limit inductor current during start-up and inrush current protection to protect the LT3479 during shorts and line transients. Both inputs of the error amplifier are available to the user allowing positive and negative output voltages. Through an external resistor, the user can program the switching frequency from 200kHz to 3.5MHz. The low profile (0.75mm) 14-pin, 4mm × 3mm DFN package provides excellent thermal performance in a small footprint. The LT3479 is also available in a thermally enhanced 16-pin TSSOP package.
Applications
- High Power LED Driver
- DSL Modems
- Distributed Power
Documentation
Data Sheet 1
User Guide 2
Design Note 2
Technical Articles 1
Press Release 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 |
|---|---|---|---|
| LT3479EDE#PBF | 14-Lead DFN (4mm x 3mm w/ EP) | ||
| LT3479EDE#TRPBF | 14-Lead DFN (4mm x 3mm w/ EP) | ||
| LT3479EFE#PBF | 16-Lead TSSOP w/ EP | ||
| LT3479EFE#TRPBF | 16-Lead TSSOP w/ EP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Feb 20, 2022 - 21_0269 Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products |
||
| LT3479EDE#PBF | PRODUCTION | |
| LT3479EDE#TRPBF | PRODUCTION | |
|
May 18, 2026 - 26_0072 Epoxy Change for Select TSSOP Products |
||
| LT3479EFE#PBF | PRODUCTION | |
| LT3479EFE#TRPBF | PRODUCTION | |
|
Apr 6, 2022 - 22_0068 Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL |
||
| LT3479EFE#PBF | PRODUCTION | |
| LT3479EFE#TRPBF | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Hot Swap Controllers 1 | ||
| LTC4364 | RECOMMENDED FOR NEW DESIGNS | Surge Stopper with Ideal Diode |
Tools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LT3479
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
LT3479EDE | High Current Boost LED Driver, VIN = 2.7V to 4.5V
Resources
LT3479EDE | High Current Boost LED Driver, VIN = 2.7V to 4.5V
Resources
LT3479EDE Demo Board | Positive/Negative Converter (LT3479 ×2), Boost: 2.5V ≤ VIN ≤ 4.2V, VOUT = 7V @ 600mA, Inverter: 2.5V ≤ VIN ≤ 12V, VOUT = –5V @ 600mA
Resources
LT3479EDE Demo Board | Positive/Negative Converter (LT3479 ×2), Boost: 2.5V ≤ VIN ≤ 4.2V, VOUT = 7V @ 600mA, Inverter: 2.5V ≤ VIN ≤ 12V, VOUT = –5V @ 600mA