component
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.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownNCP731ADNADJR2G
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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ncp731adnadjr2g.step/ncp731adnadjr2g.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (16 pp, sha256
1199d93990e9f99f, retrieved 2026-10-31, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).