LM74703QDDFRQ1
ActiveAUTOMOTIVE IDEAL DIODE CONTROLLER WITH FET GOOD OUTPUT
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LM74703QDDFRQ1
ActiveAUTOMOTIVE IDEAL DIODE CONTROLLER WITH FET GOOD OUTPUT
Deep-Dive with AI
Technical Specifications
Parameters and characteristics for this part
| Specification | LM74703QDDFRQ1 |
|---|---|
| Applications | General Purpose |
| Current - Output (Max) [Max] | 2.3 A |
| Current - Supply | 80 µA |
| Delay Time - OFF | 500 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 |
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 | $ 1.78 | |
| 10 | $ 1.60 | |||
| 25 | $ 1.51 | |||
| 100 | $ 1.29 | |||
| 250 | $ 1.21 | |||
| 500 | $ 1.06 | |||
| 1000 | $ 0.88 | |||
| Digi-Reel® | 1 | $ 1.78 | ||
| 10 | $ 1.60 | |||
| 25 | $ 1.51 | |||
| 100 | $ 1.29 | |||
| 250 | $ 1.21 | |||
| 500 | $ 1.06 | |||
| 1000 | $ 0.88 | |||
| 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
LM74703-Q1 Series
The LM74703-Q1, LM74704-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 popular DC bus voltages such as 12-V, 24-V, and 48-V automotive battery systems. The 3.2-V input voltage support is designed especially 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 provides zero DC reverse current flow. Fast response (< 0.75 µs) to reverse current blocking makes the device applicable for systems with output voltage holdup requirements during ISO7637 pulse testing as well as power fail and input micro-short conditions. LM74703-Q1, LM74704-Q1 has FETGOOD output to indicate external MOSFET drain to source short or open condition. The device features enable pin (EN). With the enable pin low, the controller is off and draws approximately 1-µA of current.
The LM74703-Q1, LM74704-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 popular DC bus voltages such as 12-V, 24-V, and 48-V automotive battery systems. The 3.2-V input voltage support is designed especially for severe cold crank requirements in automotive systems. The device can withstand and protect the loads from negative supply voltages down to –65 V.