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NCP731ADNADJR2G
Public Made by Adomby adom
onsemi Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, MSOP-8-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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README.mdadded+97@@ -0,0 +1,97 @@+# NCP731ADNADJR2G++**onsemi** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · MSOP-8-EP++NCP731ADNADJR2G from onsemi, in a MSOP-8-EP. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.++## Pinout++| Pin | Name | Type | Function |+|---|---|---|---|+| 1 | OUT | power_out | LDO output pin; the regulated output that supplies the load. |+| 2 | ADJ/FF | input | In the ADJ version this is the adjust input, which may connect directly to OUT or through a resistor divider to the output; it can also take a CFF feed-forward capacitor to OUT. |+| 3 | NC | unconnected | Not internally connected; may be left unconnected or connected to GND. |+| 4 | GND | power_in | Ground pin. |+| 5 | EN | input | Enable input (high = enable, low = disable); if unused it should be connected to IN, and the datasheet states there is no internal pull-up or pull-down. |+| 6 | SS | input | Soft-start input; a CSS capacitor sets the soft-start time and the pin may be left floating if not used. |+| 7 | NC | unconnected | Not internally connected; may be left unconnected or connected to GND. |+| 8 | IN | power_in | Power supply input pin; the datasheet specifies an operating input range of 2.7 V to 38 V. |+| 9 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | onsemi |+| Package | MSOP-8-EP |+| Category | Power Management (PMIC) |+| Pins | 9 |++## Electrical characteristics++Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).++| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |+|---|---|---|---|---|---|---|---|+| Recommended Input Voltage | VIN | 2.7 | | 38 | V | | 4 |+| Output Voltage Accuracy | VOUT | -0.6 | | 0.6 | % | TJ = +25°C | 4 |+| Output Voltage Accuracy | VOUT | -1 | | 1 | % | VIN = VOUT-NOM + 1 V to 38 V, IOUT = 0.1 mA to 150 mA, TJ = -40°C to +85°C | 4 |+| Output Voltage Accuracy | VOUT | -1.5 | | 1.5 | % | VIN = VOUT-NOM + 1 V to 38 V, IOUT = 0.1 mA to 150 mA, TJ = -40°C to +125°C | 4 |+| Output Voltage Range | VOUT-ADJ | | | 35 | V | ADJ version only; minimum printed as VADJ | 4 |+| ADJ Input Current | IADJ | -0.05 | 0.01 | 0.05 | A | VADJ = 1.2 V | 4 |+| Quiescent Current | IQ | | 48 | 100 | A | VIN = VOUT-NOM + 1 V to 38 V, IOUT = 0 mA | 4 |+| Shutdown Current | ISHDN | | 0.07 | 1 | A | VEN = 0 V, VIN = 38 V | 4 |+| Output Current Limit | IOLIM | 210 | 295 | 450 | mA | VOUT = VOUT-NOM - 100 mV | 4 |+| Short Circuit Current | IOSC | 210 | 365 | 450 | mA | VOUT = 0 V | 4 |+| Dropout Voltage | VDO | | 230 | 480 | mV | IOUT = 150 mA | 4 |+| EN Threshold | VEN-TH | 0.7 | 0.9 | 1.1 | V | VEN rising | 4 |+| EN Hysteresis | VEN-HY | 0.02 | 0.1 | 0.2 | V | VEN falling | 4 |+| EN Input Current | IEN | -1 | 0.15 | 1 | A | VEN = 30 V, VIN = 30 V | 4 |+| Internal UVLO Threshold | VUVLO-TH | 2.43 | 2.55 | 2.69 | V | VIN voltage rising | 4 |+| Internal UVLO Hysteresis | VUVLO-HY | 0.01 | 0.04 | 0.07 | V | VIN voltage falling | 4 |+| ADJ Reference Voltage | VADJ | | 1.2 | | V | ADJ version only | 4 |+| Ground Current | IGND | | 400 | | A | IOUT = 150 mA | 4 |+| PSRR | PSRR | | 80 | | dB | VIN = VOUT-NOM + 2 V, IOUT = 10 mA, 10 Hz | 4 |+| PSRR | PSRR | | 70 | | dB | VIN = VOUT-NOM + 2 V, IOUT = 10 mA, 10 kHz | 4 |+| PSRR | PSRR | | 42 | | dB | VIN = VOUT-NOM + 2 V, IOUT = 10 mA, 100 kHz | 4 |+| PSRR | PSRR | | 48 | | dB | VIN = VOUT-NOM + 2 V, IOUT = 10 mA, 1 MHz | 4 |+| Output Noise Voltage | VN | | 8.1 | | VRMS | f = 10 Hz to 100 kHz, ADJ version, VOUT = VADJ | 4 |+| Output Noise Voltage | VN | | 15 | | VRMS | f = 10 Hz to 100 kHz, ADJ version, VOUT = 3.3 V, CFF = 10 nF, R1 = 47.3 k, R2 = 27 k | 4 |+| Output Noise Voltage | VN | | 20 | | VRMS | f = 10 Hz to 100 kHz, ADJ version, VOUT = 5 V, CFF = 10 nF, R1 = 85.5 k, R2 = 27 k | 4 |+| SS Charging Current | ISS | | 910 | | nA | VSS = 0 V | 4 |+| SS High Voltage | VSS-HI | | 2.4 | | V | SS pin floating | 4 |+| SS Time | tSS-10nF | | 14 | | ms | CSS = 10 nF | 4 |+| SS Time | tSS-0nF | | 0.5 | | ms | CSS not connected | 4 |+| Thermal Shutdown Temperature | TTSD | | 170 | | °C | Temperature rising from TJ = +25°C | 4 |+| Thermal Shutdown Hysteresis | TTSDH | | 10 | | °C | Temperature falling from TSD | 4 |+| IN Voltage | VIN | -0.3 | | 40 | V | | 3 |+| OUT Voltage (ADJ version) | VOUT | -0.3 | | 40 | V | upper limit is (VIN + 0.3) or 40, whichever is lower | 3 |+| EN Voltage | VEN | -0.3 | | | V | max is VIN + 0.3 | 3 |+| ADJ/FF Voltage | VADJ | -0.3 | | 5.5 | V | | 3 |+| SS Voltage | VSS | -0.3 | | 5.5 | V | | 3 |+| Maximum Junction Temperature | TJ(MAX) | | | 150 | °C | | 3 |+| Storage Temperature | TSTG | -55 | | 150 | °C | | 3 |+| ESD Capability, Human Body Model | ESDHBM | | | 2000 | V | | 3 |+| ESD Capability, Charged Device Model | ESDCDM | | | 1000 | V | | 3 |+| Thermal Resistance, Junction-to-Air | RθJA | | 44 | | °C/W | JEDEC 2S2P board, 1 oz Cu, 645 mm2, no airflow | 3 |+| Thermal Resistance, Junction-to-Case (top) | RθJCt | | 99 | | °C/W | JEDEC 2S2P board, 1 oz Cu, 645 mm2, no airflow | 3 |+| Thermal Resistance, Junction-to-Case (bottom) | RθJCb | | 19 | | °C/W | JEDEC 2S2P board, 1 oz Cu, 645 mm2, no airflow | 3 |+| Thermal Characterization Parameter, Junction-to-Case (top) | ΨJCt | | 12 | | °C/W | JEDEC 2S2P board, 1 oz Cu, 645 mm2, no airflow | 3 |+| Thermal Characterization Parameter, Junction-to-Board | ΨJB | | 16 | | °C/W | JEDEC 2S2P board, 1 oz Cu, 645 mm2, no airflow | 3 |++## CAD (KiCad official)++- Symbol: `NCP731ADNADJR2G`+- Footprint: `Package_SO:MSOP-8-1EP_3x3mm_P0.65mm_EP1.5x1.8mm`+- 3D model: MSOP-8-EP (KiCad packages3D, STEP)+- 3D model files: `ncp731adnadjr2g-etched.step` / `ncp731adnadjr2g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ncp731adnadjr2g.step` / `ncp731adnadjr2g.glb` are the bare package body.++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [onsemi datasheet](https://www.onsemi.com/pdf/datasheet/ncp731adnadjr2-d.pdf) (16 pp, sha256 `1199d93990e9f99f`, retrieved 2026-10-31, tier: manufacturer)+- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.+- **CAD:** KiCad official libraries (CC-BY-SA 4.0).++[Datasheet PDF](docs/ncp731adnadjr2g-datasheet.pdf)
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very low noise, low quiescent current, fast transient response and high
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