Analog Devices Inc. LT8357 Boost, SEPIC & Flyback Controllers
Analog Devices LT8357 Boost, SEPIC & Flyback Controllers are a wide input range, current mode, DC/DC controller which can be configured as a boost, SEPIC, or flyback converter. The LT8357 drives a low-side N-channel power MOSFET with a 5V split gate drive. The current mode architecture allows adjustable and synchronizable 100kHz to 2MHz fixed-frequency operation, or internal 19% triangle spread-spectrum operation for low EMI. At light load, either pulse-skipping mode or low-ripple Burst Mode operation can be selected. Additional features include output power good and output short circuit protection in SEPIC and flyback configurations.
With a wide 3V to 60V input voltage range and 8μA low quiescent current, the Analog Devices LT8357 provides a simple, compact, and efficient solution for automotive, industrial, and battery-powered systems.
Features
- 3V to 60V wide input voltage range
- 8μA low IQ Burst Mode® operation
- Up to 95% efficiency at 2MHz
- ±1.5% internal 1V voltage reference
- 5V split gate drive for efficiency and EMI optimization
- Spread-spectrum frequency modulation for low EMI
- 100kHz to 2MHz fixed switching frequency with external clock synchronization
- Accurate enable threshold with hysteresis
- Programmable output soft-start and tracking
- Thermally-enhanced 12-lead MSOP package
Applications
- Automotive and industrial systems
- Battery-powered systems
- Portable electronic equipment
Typical Applications
Related Development Tool
Analog Devices Inc. EVAL-LT8357-AZ Evaluation Board
Configured to evaluate the operation of the LT8357 Boost, SEPIC, and Flyback Controllers.
Analog Devices Inc. DC2937A Demo Circuit for LT8357
Demo circuit that features the LT8357 as a 360kHz low IQ, high power boost converter.
Published: 2021-07-08
| Updated: 2022-03-11