LM73100RPWR

Overview

The LM73100RPWR is a highly integrated ideal diode and power distribution IC from Texas Instruments, designed for efficient power management in compact systems. It features an integrated back-to-back FET with a typical on-resistance of 28.4 mΩ, supporting a continuous load current of 5.5 A. The device operates within a wide input voltage range of 2.7 V to 23 V, with absolute maximum ratings up to 28 V and tolerance for negative voltages down to -15 V. Packaged in a 10-pin HotRod QFN (2 mm x 2 mm) suitable for surface mount applications, it provides comprehensive protection including overvoltage lockout, undervoltage lockout, thermal shutdown, and reverse polarity protection.

Feature Summary

• Simulates ideal diode behavior with near-zero DC reverse current and minimal forward voltage drop using linear ORing topology
• Integrates back-to-back FETs to permanently block reverse current flow from output to input
• Provides fast transient response to overcurrent events with latch-off fault protection after failure
• Includes analog load current monitoring output for precise detection across the operational current range

Applications

• Power multiplexer and ORing controller circuits
• Adapter input protection and surge suppression
• USB Power Delivery port protection
• Portable computing devices such as laptops and monitors
• Consumer electronics including set-top boxes and smart speakers

Procurement Notes

Verify the specific suffix 'RPWR' corresponds to the tape-and-reel packaging format required for automated assembly processes. Confirm that the operating temperature range of -40°C to +125°C aligns with the environmental specifications of the target application. Ensure that the 2mm x 2mm QFN footprint matches the PCB layout constraints and thermal pad requirements defined in the official datasheet to maintain optimal heat dissipation performance.

Selection Notes

Select this component when system design requires high efficiency in power path management without the complexity of external Schottky diodes. The integrated back-to-back FET architecture eliminates the need for additional blocking components, reducing bill of materials count. Consider the analog current monitor feature if real-time load sensing is necessary for system health monitoring or adaptive power limiting strategies in multi-source configurations.

Part Context

The LM73100 belongs to the family of ideal diode controllers and power switches developed by Texas Instruments for advanced power distribution needs. Unlike standard MOSFET-based solutions, this device combines control logic with power stages in a single small package. It addresses common challenges in redundant power supplies and hot-swappable interfaces by ensuring seamless source switching and preventing back-feeding between parallel power rails.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.