LM74700

@@ -0,0 +1,49 @@+# LM74700++**Texas Instruments** · Ideal diode controller · SOT-23-6++Drives an external N-channel MOSFET as an ideal diode, replacing a Schottky in the supply path with a FET that drops only millivolts, so it cuts the power lost to a series diode while still blocking reverse current. It works for reverse-polarity protection and for ORing two supplies, turning the FET on when its anode is higher and off in about a microsecond when current reverses. An EN pin gates it and an internal charge pump drives the gate. Runs from 3.2 to 65 V.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | VCAP | power_out | Charge-pump output. Connect a 0.1 μF ceramic capacitor from VCAP to ANODE; this reservoir supplies the ~15 V above ANODE needed to enhance the external N-channel MOSFET gate. |+| 2 | GND | power_in | Device ground reference. Tie to system ground; controller withstands VANODE swings down to -65 V relative to GND. |+| 3 | EN | input | Active-high enable input (VIL max 1.22 V, VIH min 1.06 V, hysteresis ~0.52 V). Drive high (or tie to ANODE) for always-on operation; pull low for ~1 μA shutdown. Absolute max 65 V; tolerates VANODE when VANODE ≤ 0 V. |+| 4 | CATHODE | input | Sense input for the ideal-diode cathode. Connect to the drain of the external N-channel MOSFET (system output rail). Recommended operating range -60 V to 60 V; ANODE-to-CATHODE regulated at 20 mV in forward conduction. |+| 5 | GATE | output | Gate-drive output for the external N-channel MOSFET. Sources ~11 mA peak to enhance the FET and sinks up to 2.37 A peak (2.3 A typical) during a reverse-current event for fast (<0.75 μs) turn-off. GATE-to-ANODE clamped ≤15 V. |+| 6 | ANODE | power_in | Input power and ideal-diode anode. Connect to the source of the external N-channel MOSFET (battery/input rail). 3.2 V to 65 V operating; POR rising ~3.9 V; requires a 22 nF (min) capacitor to GND at the pin. |++## Key specifications++| Parameter | Value |+|---|---|+| Type | Ideal-diode / ORing controller |+| Drives | External N-channel MOSFET |+| Input | 3.2-65 V |+| Forward drop | Set by FET RDS(on) (millivolts) |+| Turn-off | ~0.6 us on reverse current |+| Enable | EN pin |+| Package | SOT-23-6 |++## Ordering variants++- `LM74700QDBVR (SOT-23-6)`+- `LM74700-Q1 (automotive)`++## CAD (KiCad official)++- Symbol: `Power_Management:LM74700 (KiCad official)`+- Footprint: `Package_TO_SOT_SMD:SOT-23-6`+- 3D model: SOT-23-6 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/lm74700-q1.pdf) (36 pp, sha256 `e16b3a8c0023201f`, retrieved 2026-08-17, tier: manufacturer)+- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/lm74700-datasheet.pdf)

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