ISL6146DFRZ-T7A

Overview

The ISL6146DFRZ-T7A is a low voltage OR-ing FET controller from the Renesas ISL6146 family, designed for high current power distribution applications. It operates with supply voltages ranging from 3V to 20V and supports output voltages between 1V and 18V. The device utilizes an internal charge pump to drive N-channel MOSFETs, replacing traditional diodes to improve efficiency. It features a fast response time of less than 300ns for dead short conditions and includes programmable undervoltage lockout and overvoltage protection thresholds. The component is housed in an 8-lead DFN package measuring 3x3mm.

Feature Summary

• Integrated charge pump enables efficient gate drive for N-channel MOSFETs without external components
• Adjustable VOUT-VIN trip point via external resistors allows control sensitivity tuning against system noise
• Open drain FAULT pin provides clear indication of conditional or FET faults
• Optimized for very low voltage operation down to 1V with independent bias requirements

Applications

• N+1 Industrial and Telecom Power Distribution Systems
• Uninterruptible Power Supplies (UPS)
• Low Voltage Processor and Memory Storage Systems
• Datacom Systems requiring redundant power inputs

Procurement Notes

Verify the specific suffix 'T7A' against official Renesas documentation to confirm tape and reel specifications and moisture sensitivity levels. Confirm that the DFRZ designation aligns with the required 8-lead DFN package dimensions. Check for any recent Product Change Notices regarding label updates or end-of-life status before finalizing procurement plans.

Selection Notes

Select this variant when designing systems requiring precise fault reporting and conduction state monitoring, distinguishing it from the D and E subtypes which lack these features. Ensure the design accommodates the necessary independent bias voltage if operating below 3V input. Validate that the 3x3mm DFN footprint meets the thermal and mechanical constraints of the target PCB layout.

Part Context

This component belongs to the ISL6146 series of OR-ing controllers manufactured by Renesas Electronics Corporation. The series is engineered to replace power OR-ing diodes in high-current applications, significantly increasing power distribution efficiency. The family includes variants A through E, each tailored for specific voltage ranges and feature sets such as conduction monitoring.

Replacement Considerations

Direct substitutes within the same family include ISL6146AFUZ-T, ISL6146BFRZ-TK, and ISL6146DFRZ. Verify package compatibility and feature parity, particularly regarding conduction monitor availability, when substituting.