Product details


Vin (Min) (V) 1.5 Vin (Max) (V) 5.5 Features Enable, ON/OFF control Iq (Typ) (mA) 0.00015 Iq (Max) (mA) 0.0003 Operating temperature range (C) -40 to 105, -40 to 125 Design support EVM, Simulation Model Rating Catalog Channel(s) controlled (#) 1 FET Internal open-in-new Find other Ideal diode/ORing controllers

Package | Pins | Size

SOT-SC70 (DCK) 6 4 mm² 2 x 2.1 open-in-new Find other Ideal diode/ORing controllers


  • Wide operating voltage range: 1.5 V – 5.5 V
  • Reverse voltage standoff on VIN:
    –6-V absolute maximum
  • Maximum continuous current (IMAX): 1.5 A
  • On-Resistance (RON):
    • 5-V VIN = 79-mΩ (typical)
    • 3.6-V VIN = 91-mΩ (typical)
    • 1.8-V VIN = 141-mΩ (typical)
  • Comparator chip enable (CE)
  • Channel status indication (ST)
  • Low current consumption:
    • 3.6-V VIN Shutdown current (ISD,VIN): 120-nA (typical)
    • 3.6-V VIN Quiescent current (IQ, VIN): 150-nA (typical)
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The LM66100 is a Single-Input, Single-Output (SISO) integrated ideal diode that is well suited for a variety of applications. The device contains a P-channel MOSFET that can operate over an input voltage range of 1.5 V to 5.5 V and can support a maximum continuous current of 1.5 A.

The chip enable works by comparing the CE pin voltage to the input voltage. When the CE pin voltage is higher than VIN, the device is disabled and the MOSFET is off. When the CE pin voltage is lower, the MOSFET is on. The LM66100 also comes with reverse polarity protection (RPP) that can protect the device from a miswired input, such as a reversed battery.

Two LM66100 devices can be used in an ORing configuration similar to a dual diode ORing implementation. In this configuration, the devices pass the highest input voltage to the output while blocking reverse current flow into the input supplies. These devices can compare input and output voltages to make sure that reverse current is blocked through an internal voltage comparator.

The LM66100 is available in a standard SC-70 package characterized for operation over a junction temperature range of –40°C to 125°C.

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Technical documentation

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Type Title Date
* Data sheet LM66100 5.5-V, 1.5-A 79-mΩ, Low IQ Ideal Diode With Input Polarity Protection datasheet (Rev. A) Jun. 14, 2019
Application note Supercapacitor Backup Power Supply w/ Current Limit for Smart Electricity Meter (Rev. A) Aug. 03, 2021
Application note Basics of Ideal Diodes (Rev. A) Feb. 17, 2021
Application note Multibattery management in medical ultrasound systems (Rev. A) Jan. 21, 2021
Application note Designing a Low-Cost, High-Accuracy Infrared Thermometer Nov. 25, 2020
White paper How to detect and harden a meter against tampering by neutral disconnection Feb. 12, 2020
Application note Extend Battery Life Using Load Switches and Ideal Diodes Aug. 16, 2019
E-book 11 Ways to Protect Your Power Path white paper Jul. 03, 2019
Application note Eliminate the Voltage Drop and Save Power: An Ideal Diode (Rev. A) Jul. 03, 2019
Application note Basics of Power Switches (Rev. A) Apr. 26, 2019
Technical article What’s with chirping smoke detectors? Mar. 06, 2019
User guide LM66100EVM User's Guide Dec. 18, 2018

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

document-generic User guide
The LM66100 evaluation module (EVM) is an assembled and tested circuit for evaluating the LM66100 ideal diode. The LM66100EVM allows the user to apply different input voltages (1.5 V to 5.5 V) under different loading conditions (0 A to 1.5 A), and evaluate configurations such as Dual ORing and (...)
  • EVM enables evaluation of the LM66100 load switch
  • VIN input voltage range: 1.5 V to 5.5 V
  • EVM allows access to the VIN, VOUT, GND, ST and CE pin of the LM66100 Load Switch Device
  • No Input Current Consumption
  • On board CIN and COUT capacitors
document-generic User guide

The TPS63802HDKEVM is a universal development tool designed to help the users easily and quickly evaluate and test the most common buck-boost converter use-cases. The use-cases include backup power, input current limit, LED driver, digital voltage scaling, bypass mode and precise enable. The user (...)

  • Universal Tool to test most common buck-boost converter use-cases
  • Use-cases: backup power, input current limit, LED driver, digital voltage scaling, bypass mode and precise enable
  • Change quickly between use-cases without soldering
  • All use-cases are tested and the user guide includes quick-start (...)

Design tools & simulation

SLVMD40B.ZIP (67 KB) - PSpice Model
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

Reference designs

Supercapacitor backup power supply with current limit and active cell balancing reference design
PMP30693 — This reference design automatically provides a back-up voltage during a power interruption. It manages the charging of supercapitors and provides reverse blocking protection. The maximum supercapacitor charging current and voltage can be adjusted. When the input voltage fails a buck-boost converter (...)
document-generic Schematic
Low-power wireless camera reference design for extended battery life
TIDA-010224 — This reference design provides a solution for a battery-operated wireless camera by combining industry-leading image processing, connectivity, sensor and power. High-efficiency power converters along with optimized system architecture help to increase battery life. The image
processor with a (...)
document-generic Schematic

CAD/CAE symbols

Package Pins Download
SC70 (DCK) 6 View options

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