Products
LT3959
PRODUCTIONWide Input Voltage Range Boost/SEPIC/Inverting Converter with 6A, 40V Switch
- Part Models
- 8
- 1ku List Price
- Starting From $4.21
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Overview
- Wide VIN Range: 1.6V (2.5V Start-Up) to 40V
- Positive or Negative Output Voltage Programming with a Single Feedback Pin
- PGOOD Output Voltage Status Report
- Internal 6A/40V Power Switch
- Programmable Soft-Start
- Programmable Operating Frequency (100kHz to 1MHz) with One External Resistor
- Synchronizable to an External Clock
- Low Shutdown Current < 1μA
- INTVCC Regulator Supplied from VIN or DRIVE
- Programmable Input Undervoltage Lockout with Hysteresis
- Thermally Enhanced QFN (5mm × 6mm) and TSSOP Packages
The LT3959 is a wide input range, current mode, DC/DC controller which is capable of regulating either positive or negative output voltages from a single feedback pin. It can be configured as a boost, SEPIC or inverting converter.
It features an internal low side N-channel MOSFET rated for 6A at 40V and driven from an internal regulated supply provided from VIN or DRIVE. The fixed frequency, current-mode architecture results in stable operation over a wide range of supply and output voltages. The operating frequency of LT3959 can be set over a 100kHz to 1MHz range with an external resistor, or can be synchronized to an external clock using the SYNC pin.
The LT3959 features soft-start and frequency foldback functions to limit inductor current during start-up and output short-circuit. A window comparator on the FBX pin reports via the PGOOD pin, providing output voltage status indication.
Applications
- Automotive
- Telecom
- Industrial
Documentation
Data Sheet 1
User Guide 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 |
|---|---|---|---|
| LT3959EFE#PBF | 38-Lead TSSOP w/ EP | ||
| LT3959EFE#TRPBF | 38-Lead TSSOP w/ EP | ||
| LT3959EUHE#PBF | 36-Lead QFN (5mm x 6mm x 0.75mm w/ EP) | ||
| LT3959EUHE#TRPBF | 36-Lead QFN (5mm x 6mm x 0.75mm w/ EP) | ||
| LT3959IFE#PBF | 38-Lead TSSOP w/ EP | ||
| LT3959IFE#TRPBF | 38-Lead TSSOP w/ EP | ||
| LT3959IUHE#PBF | 36-Lead QFN (5mm x 6mm x 0.75mm w/ EP) | ||
| LT3959IUHE#TRPBF | 36-Lead QFN (5mm x 6mm x 0.75mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 6, 2022 - 22_0068 Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL |
||
| LT3959EFE#PBF | PRODUCTION | |
| LT3959EFE#TRPBF | PRODUCTION | |
| LT3959IFE#PBF | PRODUCTION | |
| LT3959IFE#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:
- LT3959
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
LT3959EUHE Boost Demo Board | 2V-10VIN; VOUT = 12V @ 2A