ISL6146DFRZ-T

Overview

The ISL6146DFRZ-T is a low voltage OR-ing FET controller from the Renesas ISL6146 family, designed for N+1 power distribution architectures. It operates with supply voltages ranging from 3V to 20V and supports N-channel MOSFETs. The device features an internal charge pump for gate drive and offers programmable undervoltage lockout (UVLO) and overvoltage protection (OVP). It provides fast reverse current fault isolation with a turn-off delay of 65 ns and includes a fault output pin. The component is housed in an 8-DFN (3x3 mm) package with exposed pad and is rated for operation between -40°C and +125°C.

Feature Summary

• Integrated charge pump enables efficient driving of N-channel MOSFETs without external bootstrap components
• Programmable UVLO and OVP inputs allow customization of operating thresholds for system protection
• Fast comparator circuitry ensures rapid reverse current fault isolation to protect power sources
• Open-drain FAULT pin provides clear indication of conditional or FET faults

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 that the specific suffix 'FRZ-T' corresponds to the tape-and-reel packaging variant of the ISL6146D model. Confirm the manufacturer part number matches official Renesas documentation, as distributors may list variations. Check for End-of-Life (EOL) notifications, as the broader ISL6146 family has been subject to discontinuance notices. Ensure compatibility with the required 8-DFN footprint and thermal requirements for the target application.

Selection Notes

Select this component when designing systems requiring N+1 redundancy with low voltage inputs starting at 3V. The ISL6146D variant is suitable for applications needing separate BIAS and VIN connections with active high enable functionality. Consider the 65 ns turn-off delay for fast transient response needs. Compare against ISL6146A/B variants if operation down to 1V is required, noting those versions need an independent 3V bias source.

Part Context

The ISL6146 series represents a family of OR-ing MOSFET controllers intended to replace traditional diode OR-ing configurations for improved efficiency. The ISL6146D specifically targets systems with 3V to 20V input ranges. It integrates control logic, charge pump, and protection features into a compact surface-mount package, facilitating dense PCB layouts for modern power management designs in telecom and industrial sectors.

Replacement Considerations

Direct substitutes include other variants within the ISL6146 family such as ISL6146BFRZ or ISL6146EFRZ, provided the electrical characteristics like voltage range and enable logic match the design requirements. Verify package compatibility (8-DFN) and thermal performance. Note that some variants may have different enable polarity or bias requirements.