LTC4266AIUHF-1#TRPBF

Overview

The LTC4266AIUHF-1#TRPBF is a hot-swap controller designed for PCIe and other high-speed bus applications. It integrates an N-channel MOSFET driver, current limit circuitry, and voltage monitoring. The device supports dual power rails with independent control. Key electrical parameters include a supply voltage range of 3V to 5.5V, a threshold voltage accuracy of ±1%, and a maximum on-resistance of the internal pass transistor. It features programmable soft-start time and current limit thresholds via external resistors.

Feature Summary

• Integrated hot-swap controller with built-in N-channel MOSFET driver
• Supports dual-rail operation for independent power sequencing
• Programmable current limit and soft-start functionality
• High-accuracy voltage monitoring and fault protection

Applications

• PCI Express card edge connectors
• Hot-pluggable server backplanes
• Industrial I/O modules requiring safe insertion
• Telecommunications equipment with live slot access

Procurement Notes

Verify the exact suffix 'TRPBF' indicates tape and reel packaging with lead-free finish. Confirm the 'I' grade denotes industrial temperature range performance. Ensure the manufacturer source is Analog Devices Inc. or authorized distributors. Check for RoHS compliance documentation specific to this batch. Validate pinout compatibility with target PCB layout before procurement.

Selection Notes

Select this component when dual-rail hot-swap control is required for PCIe or similar interfaces. Consider the integrated MOSFET driver for simplified design compared to discrete solutions. Evaluate the programmable current limit settings against load requirements. Verify thermal performance under maximum load conditions. Ensure the package type matches available footprint constraints.

Part Context

This part belongs to the LTC4266 family of hot-swap controllers. It is specifically optimized for high-density applications like PCIe cards. The 'A' grade indicates enhanced performance specifications over standard grades. The 'UHF' package is a fine-pitch QFN suitable for space-constrained designs. It complements other power management ICs in system-level power distribution networks.

Replacement Considerations

Direct substitutes may include other LTC4266 variants with different temperature grades or packaging options. Cross-reference pinouts and electrical characteristics carefully. Verify that alternative parts support the same dual-rail architecture. Check for equivalent current limit programming ranges. Ensure thermal dissipation capabilities match the application requirements.