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LM66100 5.5 V, 1.5 A 79 mΩ, Low-IQ Ideal Diode
Texas Instruments' diode with input polarity protection is ideal for a variety of standalone and multi-channel applications
Image of Texas Instruments' LM66100 Low IQ Ideal DiodeTexas Instruments' 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 (CE) 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 diode offers reverse polarity protection (RPP) that can protect the device from a miswired input, such as reversed batteries.

Two LM66100 devices can be used in an O-Ring configuration similar to a dual diode O-Ring 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.

Features
On-resistance (RON):
5 VIN = 79 mΩ (typ.)
3.6 VIN = 91 mΩ (typ.)
1.8 VIN = 141 mΩ (typ.)
Low current consumption:
3.6 VIN shutdown current (ISD, VIN): 120 nA (typ.)
3.6 VIN quiescent current (IQ, VIN): 150 nA (typ.)
Wide operating voltage range: 1.5 V to 5.5 V
Reverse voltage standoff on VIN: -6 V absolute max
Max continuous current (IMAX): 1.5 A
Comparator CE
Channel status indication (ST)
Applications
Smart meters
Building automation
GPS and tracking
Primary and backup batteries