LTC7892
RECOMMENDED FOR NEW DESIGNSLow IQ, Dual, 2-Phase Synchronous Boost Controller for GaN FETs
- Part Models
- 4
- 1ku List Price
- Starting From $4.27
Overview
- GaN Drive Technology fully Optimized for GaN FETs
- Output Voltage up to 100V
- Wide VIN Range: 4V to 60V and Operates Down to 1V After Start-Up
- No Catch, Clamp, or Bootstrap Diodes Needed
- Internal Smart Bootstrap Switches Prevent Overcharging of High-Side Driver Supplies
- Resistor Adjustable Dead Times
- Split Output Gate Drivers for Adjustable Turn-On and Turn-Off Driver Strengths
- Accurate Adjustable Driver Voltage and UVLO
- Low Operating IQ: 15μA
- Programmable Frequency (100kHz to 3MHz)
- Synchronizable Frequency (100kHz to 3MHz)
- Spread Spectrum Frequency Modulation
- 40-Lead (6mm × 6mm), Side Wettable, QFN Package
- AEC-Q100 Qualified for Automotive Applications
The LTC®7892 is a high-performance dual boost DC-to-DC switching regulator controller that drives all N-channel synchronous gallium nitride (GaN) field effect transistor (FET) power stages with output voltages up to 100V. The LTC7892 solves many of the challenges traditionally faced when using GaN FETs. The LTC7892 simplifies the application design while requiring no protection diodes and no other additional external components compared to a silicon metal-oxide-semiconductor field effect transistor (MOSFET) solution.
The Internal smart bootstrap switches prevent overcharging of the BOOSTx pin to the SWx pin the high-side driver supplies during dead times, protecting the gate of the top GaN FET. The dead times of the LTC7892 can optionally be optimized with external resistors for margin or to tailor the application for higher efficiency and allowing for high-frequency operation.
The gate drive voltage of the LTC7892 can be precisely adjusted from 4V to 5.5V to optimize performance and allow the use of different GaN FETs or even logic-level MOSFETs. When biased from the boost converter regulator output, the LTC7892 can operate from an input supply as low as 1V after start-up.
APPLICATIONS
- Automotive and Industrial Power Systems
- Military Avionics and Medical Systems
- Telecommunications Power Systems
Documentation
Data Sheet 1
User Guide 1
Technical Articles 1
Analog Dialogue 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 |
|---|---|---|---|
| LTC7892AUJM#PBF | 40-Lead QFN (6mm x 6mm, Plastic Side Wettable) | ||
| LTC7892AUJM#TRPBF | 40-Lead QFN (6mm x 6mm, Plastic Side Wettable) | ||
| LTC7892AUJM#WPBF | 40-Lead QFN (6mm x 6mm, Plastic Side Wettable) | ||
| LTC7892AUJM#WTRPBF | 40-Lead QFN (6mm x 6mm, Plastic Side Wettable) |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareTools & Simulations
LTspice 1
Models for the following parts are available in LTspice:
- LTC7892
LTpowerCAD
Design tools for the following parts are available in LTpowerCAD:
- LTC7892
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
High Frequency Step-Up Controller with 100V GaN FETs
Resources
High Frequency Step-Up Controller with 100V GaN FETs