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Ideal diode/ORing controllers

LM66100

ACTIVE

1.5-V to 5.5-V, 1.5-A, 0.5-µA IQ ideal diode with integrated FET

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Data sheet

LM66100

ACTIVE
Data sheet Order now

Product details

Vin (min) (V) 1.5 Vin (max) (V) 5.5 Number of channels 1 Features Enable, Gate ON/OFF control, Power good signal, Reverse current blocking, Reverse polarity protection Iq (typ) (mA) 0.00015 Iq (max) (mA) 0.0003 FET Integrated single FET Operating temperature range (°C) -40 to 125 Design support EVM, Simulation Model Rating Catalog Imax (A) 1.5 Shutdown current (ISD) (mA) (A) 0.00012 Device type Ideal diode controller Product type Ideal diode controller
Vin (min) (V) 1.5 Vin (max) (V) 5.5 Number of channels 1 Features Enable, Gate ON/OFF control, Power good signal, Reverse current blocking, Reverse polarity protection Iq (typ) (mA) 0.00015 Iq (max) (mA) 0.0003 FET Integrated single FET Operating temperature range (°C) -40 to 125 Design support EVM, Simulation Model Rating Catalog Imax (A) 1.5 Shutdown current (ISD) (mA) (A) 0.00012 Device type Ideal diode controller Product type Ideal diode controller
SOT-SC70 (DCK) 6 4.2 mm² 2 x 2.1
  • 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)
  • 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)

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.

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) PDF | HTML 14 Jun 2019
Analog Design Journal Multibattery management in medical ultrasound systems (Rev. B) PDF | HTML 08 Jun 2023
Application note IEEE 802.3cg 10BASE-T1L Power over Data Lines Powered Device Design (Rev. A) PDF | HTML 02 Jun 2022
Application note Basics of Ideal Diodes (Rev. B) PDF | HTML 05 Oct 2021
Application note Supercapacitor Backup Power Supply w/ Current Limit for Smart Electricity Meter (Rev. A) 03 Aug 2021
Application note Designing a Low-Cost, High-Accuracy Infrared Thermometer 25 Nov 2020
White paper How to detect and harden a meter against tampering by neutral disconnection 12 Feb 2020
Application brief Extend Battery Life Using Load Switches and Ideal Diodes 16 Aug 2019
E-book 11 Ways to Protect Your Power Path 03 Jul 2019
Application brief Eliminate the Voltage Drop and Save Power: An Ideal Diode (Rev. A) 03 Jul 2019
Application note Basics of Power Switches (Rev. A) PDF | HTML 26 Apr 2019
Technical article What’s with chirping smoke detectors? PDF | HTML 06 Mar 2019
EVM User's guide LM66100EVM User's Guide 18 Dec 2018

Design & development

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

Evaluation board

LM66100EVM — LM66100 ±6V, 1.5A low IQ ideal diode evaluation module

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 (...)
User guide: PDF
Not available on TI.com
Evaluation board

TPS63802HDKEVM — TPS63802HDKEVM - Hardware Development Kit

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 (...)

User guide: PDF
Not available on TI.com
Simulation model

LM66100 Unencrypted PSpice Transient Model Package (Rev. B)

SLVMD40B.ZIP (67 KB) - PSpice Model
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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)
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Design guide: PDF
Schematic: PDF
Reference designs

PMP30693 — Supercapacitor backup power supply with current limit and active cell balancing reference design

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 (...)
Test report: PDF
Schematic: PDF
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