Specification	LM74700QDDFRQ1

Current - Output (Max) [Max]	5 A
Delay Time - OFF	450 ns
Delay Time - ON	1.4 µs
FET Type	N-Channel
Grade	Automotive
Internal Switch(s)	False
Mounting Type	Surface Mount
Operating Temperature [Max]	125 ¯C
Operating Temperature [Min]	-40 °C
Package / Case	SOT-23-8 Thin, TSOT-23-8
Qualification	AEC-Q100
Ratio - Input:Output [custom]	1:1
Supplier Device Package	TSOT-23-8
Type	N+1 ORing Controller
Voltage - Supply [Max]	65 V
Voltage - Supply [Min]	3.2 V

LM74700-Q1 Series

3.2-V to 65-V, 80-uA IQ automotive ideal diode controller

Part	Supplied Contents	Secondary Attributes	Contents	Function	Type	Utilized IC / Part	Delay Time - ON	Grade	Ratio - Input:Output [custom]	Current - Output (Max) [Max]	Operating Temperature [Min]	Operating Temperature [Max]	Supplier Device Package	Voltage - Supply [Min]	Voltage - Supply [Max]	Qualification	Delay Time - OFF	Mounting Type	FET Type	Package / Case	Current - Supply	Applications	Primary Attributes
Texas Instruments LM74700EVM	Board(s)	On-Board Test Points	Board(s)	ORing Controller / Ideal Diode	Power Management	LM74700-Q1
Texas Instruments LM74700QDDFRQ1					N+1 ORing Controller		1.4 µs	Automotive	1:1	5 A	-40 °C	125 ¯C	TSOT-23-8	3.2 V	65 V	AEC-Q100	450 ns	Surface Mount	N-Channel	SOT-23-8 Thin TSOT-23-8
Texas Instruments LM74700MDDFREP					N+1 ORing Controller		1.4 µs		1:1		-50 °C	125 ¯C	TSOT-23-8	3.2 V	65 V		450 ns	Surface Mount	N-Channel	SOT-23-8 Thin TSOT-23-8	80 µA	General Purpose
Texas Instruments LM74700QDBVRQ1					N+1 ORing Controller		1.4 ĩs	Automotive	1:1	5 A	-40 °C	125 ¯C	SOT-23-6	3.2 V	65 V	AEC-Q100	450 ns	Surface Mount	N-Channel	SOT-23-6
Texas Instruments V62/21608					N+1 ORing Controller		1.4 µs		1:1		-50 °C	125 ¯C	TSOT-23-8	3.2 V	65 V		450 ns	Surface Mount	N-Channel	SOT-23-8 Thin TSOT-23-8	80 µA	General Purpose
Texas Instruments LM74700DDFEVM	Board(s)			ORing Controller / Ideal Diode	Power Management	LM74700-Q1																	1-Channel (Single)

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Cut Tape (CT)	1	$ 2.30
		10	$ 2.07
		25	$ 1.95
		100	$ 1.66
		250	$ 1.56
		500	$ 1.36
		1000	$ 1.13
	Digi-Reel®	1	$ 2.30
		10	$ 2.07
		25	$ 1.95
		100	$ 1.66
		250	$ 1.56
		500	$ 1.36
		1000	$ 1.13
	Tape & Reel (TR)	3000	$ 0.82
		6000	$ 0.79
Texas Instruments	LARGE T&R	1	$ 1.34
		100	$ 1.11
		250	$ 0.80
		1000	$ 0.60

Description

General part information

LM74700-Q1 Series

The LM74700-Q1 is an automotive AEC Q100 qualified ideal diode controller which operates in conjunction with an external N-channel MOSFET as an ideal diode rectifier for low loss reverse polarity protection with a 20-mV forward voltage drop. The wide supply input range of 3.2 V to 65 V allows control of many popular DC bus voltages such as 12-V, 24-V and 48-V automotive battery systems. The 3.2-V input voltage support is particularly well suited for severe cold crank requirements in automotive systems. The device can withstand and protect the loads from negative supply voltages down to –65 V.

The device controls the GATE of the MOSFET to regulate the forward voltage drop at 20 mV. The regulation scheme enables graceful turn off of the MOSFET during a reverse current event and ensures zero DC reverse current flow. Fast response (< 0.75 µs) to Reverse Current Blocking makes the device suitable for systems with output voltage holdup requirements during ISO7637 pulse testing as well as power fail and input micro-short conditions.

The LM74700-Q1 controller provides a charge pump gate drive for an external N-channel MOSFET. The high voltage rating of LM74700-Q1 helps to simplify the system designs for automotive ISO7637 protection. With the enable pin low, the controller is off and draws approximately 1 µA of current.