LM74700QDRQ1
ActiveAUTOMOTIVE, 3.2-V TO 70-V, 80-ΜA REVERSE BATTERY PROTECTION IDEAL DIODE CONTROLLER
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LM74700QDRQ1
ActiveAUTOMOTIVE, 3.2-V TO 70-V, 80-ΜA REVERSE BATTERY PROTECTION IDEAL DIODE CONTROLLER
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Technical Specifications
Parameters and characteristics for this part
| Specification | LM74700QDRQ1 |
|---|---|
| Applications | Redundant Power Supplies |
| Current - Output (Max) [Max] | 2.3 A |
| Current - Supply | 110 µA |
| FET Type | N-Channel |
| Internal Switch(s) | True |
| Mounting Type | Surface Mount |
| Operating Temperature [Max] | 125 °C |
| Operating Temperature [Min] | -40 °C |
| Package / Case | 8-SOIC |
| Package / Case [x] | 0.154 in |
| Package / Case [y] | 3.9 mm |
| Ratio - Input:Output [custom] | 1:1 |
| Supplier Device Package | 8-SOIC |
| Type | N+1 ORing Controller |
| Voltage - Supply [Max] | 65 V |
| Voltage - Supply [Min] | 3.2 V |
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 | $ 2.36 | |
| 10 | $ 2.12 | |||
| 25 | $ 2.00 | |||
| 100 | $ 1.70 | |||
| 250 | $ 1.60 | |||
| 500 | $ 1.40 | |||
| 1000 | $ 1.16 | |||
| Digi-Reel® | 1 | $ 2.36 | ||
| 10 | $ 2.12 | |||
| 25 | $ 2.00 | |||
| 100 | $ 1.70 | |||
| 250 | $ 1.60 | |||
| 500 | $ 1.40 | |||
| 1000 | $ 1.16 | |||
| Tape & Reel (TR) | 2500 | $ 1.08 | ||
| 5000 | $ 1.04 | |||
| Texas Instruments | LARGE T&R | 1 | $ 1.77 | |
| 100 | $ 1.46 | |||
| 250 | $ 1.05 | |||
| 1000 | $ 0.79 | |||
Description
General part information
LM74700D-Q1 Series
The LM74700D-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 designed 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 makes sure of zero DC reverse current flow. Fast response (< 0.75 µs) to reverse current blocking makes the device designed for systems with output voltage holdup requirements during ISO7637 pulse testing as well as power fail and input micro-short conditions.
The LM74700D-Q1 controller provides a charge pump gate drive for an external N-channel MOSFET. The high voltage rating of LM74700D-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.
Documents
Technical documentation and resources