LTC3901EGN#PBF

Overview

The LTC3901EGN#PBF is a high voltage synchronous rectifier controller designed for isolated power supplies. It operates with an input voltage range of 4V to 60V and supports output voltages from 0.8V to 24V. The device features a typical quiescent current of 50µA in sleep mode and 14µA in shutdown. It functions at switching frequencies up to 835kHz and is housed in a SSOP-28 package. The operational temperature range spans from -40°C to +150°C, ensuring reliability in demanding environments.

Feature Summary

• Synchronous rectification control for isolated full-bridge and half-bridge converters
• Wide input voltage capability supporting high-voltage bus architectures
• Low quiescent current consumption for improved system efficiency
• Integrated soft-start and fault protection mechanisms

Applications

• Isolated DC/DC converters in telecom infrastructure
• Industrial distributed power systems
• Automotive always-on battery systems
• High-voltage point-of-load modules

Procurement Notes

Verify the specific suffix EG indicates the commercial temperature grade and SSOP-28 package configuration against the manufacturer's official datasheet. Confirm RoHS compliance status and lead times directly with authorized distributors, as availability may vary by region. Ensure the ordering part number matches the exact pinout and electrical specifications required for the target design.

Selection Notes

Select this component when designing isolated topologies requiring synchronous rectification on the secondary side. It is suitable for applications needing wide input voltage ranges and low standby power consumption. Compare performance metrics such as propagation delay and gate drive strength against alternative controllers to ensure compatibility with the chosen MOSFETs and switching frequency requirements.

Part Context

This component belongs to the Analog Devices LTC3901 family of synchronous rectifier controllers. It is commonly paired with primary-side controllers like the LTC3723 or LT1431 in isolated converter designs. The EG variant specifically denotes the commercial temperature range and SSOP-28 packaging, distinguishing it from other thermal or package options within the same functional series.

Replacement Considerations

Direct substitutes include the LTC3901HGN#PBF for higher temperature operation or the LTC3901MPGN#PBF for military-grade specifications. Verify pin compatibility and electrical parameter alignment before substitution.