ISL6146DFRZ-TK

Overview

The ISL6146DFRZ-TK is an N+1 ORing controller from the Renesas ISL6146 family, designed for low-voltage power distribution applications. It utilizes an internal charge pump to drive external N-channel MOSFETs, replacing traditional diodes to improve efficiency. The device supports input voltages from 3V to 20V and operates within a temperature range of -40°C to 125°C. Key electrical parameters include a supply current of 25 µA and a turn-off delay time of 65 ns. It is housed in an 8-DFN (3x3 mm) package with exposed pad.

Feature Summary

• Integrates a high-speed comparator for rapid reverse current fault isolation
• Features an internal charge pump to drive N-channel MOSFETs without external components
• Provides user-programmable undervoltage lockout and fault output indication

Applications

• N+1 redundant power systems
• Telecommunications and data communication infrastructure
• Uninterruptible power supplies (UPS)
• Low voltage processor and memory storage systems

Procurement Notes

Verify the specific suffix 'TK' indicates tape and reel packaging configuration as per manufacturer documentation. Confirm that the base part number ISL6146DFRZ corresponds to the DFN-8 package variant. Check for any product change notices or end-of-life announcements associated with this specific manufacturing lot or revision level before finalizing procurement plans.

Selection Notes

Select this component when designing systems requiring efficient OR-ing of multiple power sources using N-channel MOSFETs. Ensure the system voltage falls within the 3V to 20V operating range. Consider the 65 ns turn-off delay for fast transient response requirements. Verify that the 8-DFN package dimensions fit the PCB layout constraints and thermal management needs.

Part Context

This part belongs to the ISL6146 family of OR-ing controllers, which includes variants like ISL6146A, B, C, D, and E. These devices are optimized for different voltage ranges and feature sets, such as conduction monitoring or separate bias inputs. The ISL6146D variant specifically offers standard operation down to 3V with programmable UVLO, distinguishing it from lower-voltage optimized versions.

Replacement Considerations

Direct substitutes within the same family include ISL6146DFRZ (tray packaging). Other variants like ISL6146AFUZ or ISL6146BFRZ may require circuit adjustments due to differences in voltage thresholds or pin configurations.