component
NCP5661DTADJRKG
Public Made by Adomby adom
onsemi Linear Voltage Regulators (LDO), TO-252-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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NCP5661DTADJRKG
onsemi · Linear Voltage Regulators (LDO) · TO-252-5
NCP5661DTADJRKG from onsemi, in a TO-252-5. 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 | Enable | input | On/off control of the regulator: connect to Ground to disable the device, or to Vin if the function is not used (threshold high 1.3 V min, low 0.3 V max). |
| 2 | Vin | power_in | Positive power supply input voltage, operating range 2.0 V to 9.0 V (absolute maximum 18 V). |
| 3 | Ground | power_in | Power supply ground; the TAB is also connected to Ground. |
| 4 | Vout | power_out | Regulated output voltage, up to 1.0 A load current, requiring output capacitance Cout > 10 µF for stability. |
| 5 | Adj | input | Connected to the resistor divider network that programs the output voltage against the 0.9 V reference (adjustable version, typical Adj pin current 40 nA). |
| 6 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | TO-252-5 |
| Category | Power Supply Chip |
| Pins | 6 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Input Voltage | Vin | 2 | 9 | V | Adjustable output version | 3 | |
| Output Voltage Accuracy | Vout | -1 | 1 | % | TJ = 25°C (Iout = 10 mA to 1.0 A) | 3 | |
| Output Voltage Accuracy | Vout | -1.5 | 1.5 | % | TJ = -20 to +125°C (Iout = 10 mA to 1.0 A) | 3 | |
| Output Voltage Accuracy | Vout | -2 | 2 | % | TJ = -40 to +150°C (Iout = 10 mA to 1.0 A) | 3 | |
| Dropout Voltage | VDO | 1 | 1.3 | V | Iout = 1.0 A | 3 | |
| Peak Output Current Limit | Iout | 1 | A | 3 | |||
| Ground Current | Iq | 1.3 | 3 | mA | Iout = 1.0 A | 3 | |
| Disabled State Ground Current | Iqds | 10 | 300 | A | Disabled State | 3 | |
| Enable Input Threshold Voltage High | Ven | 1.3 | V | Voltage Increasing, On State, Logic High | 3 | ||
| Enable Input Threshold Voltage Low | Ven | 0.3 | V | Voltage Decreasing, Off State, Logic Low | 3 | ||
| Output Noise Voltage | Vn | 26 | Vrms | f = 10 Hz to 100 kHz | 3 | ||
| Adjustable Pin Input Current | Iadj | 40 | nA | 3 | |||
| Line Regulation | REGline | 0.03 | % | Iout = 10 mA, Vout+1.5 V < Vin < 7.0 V | 3 | ||
| Load Regulation | REGload | 0.03 | % | 10 mA < Iout < 1.0 A | 3 | ||
| Internal Current Limitation | Ilim | 1.5 | A | 3 | |||
| Ripple Rejection | RR | 70 | dB | 120 Hz | 3 | ||
| Ripple Rejection | RR | 65 | dB | 1.0 kHz | 3 | ||
| Thermal Shutdown | TSHD | 160 | °C | Guaranteed by Design | 3 | ||
| Enable Input Current | Ien | 0.5 | A | Enable Pin Voltage = 0.3 Vmax | 3 | ||
| Input Voltage (max rating) | Vin | 18 | V | 2 | |||
| Output Pin Voltage | Vout | -0.3 | V | -0.3 to Vin +0.3 | 2 | ||
| Adjust Pin Voltage | Vadj | -0.3 | V | -0.3 to Vin +0.3 | 2 | ||
| Enable Pin Voltage | Ven | -0.3 | V | -0.3 to Vin +0.3 | 2 | ||
| Operating Junction Temperature Range | TJ | -40 | 150 | °C | 2 | ||
| Storage Temperature Range | Tstg | -55 | 150 | °C | 2 | ||
| Thermal Resistance, Junction-to-Air | RθJA | 100 | °C/W | DPAK-5, 1 oz copper, 0.26 in2 copper area (minimum pad) | 2 | ||
| Thermal Resistance, Junction-to-Case | RθJC | 8 | °C/W | DPAK-5 | 2 |
CAD (KiCad official)
- Symbol:
NCP5661DTADJRKG - Footprint:
Package_TO_SOT_SMD:TO-252-5_TabPin6 - 3D model: TO-252-5 (KiCad packages3D, STEP)
- 3D model files:
ncp5661dtadjrkg-etched.step/ncp5661dtadjrkg-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ncp5661dtadjrkg.step/ncp5661dtadjrkg.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (13 pp, sha256
a3b1428afdd1ab29, retrieved 2026-10-23, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-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).
# NCP5661DTADJRKG
**onsemi** · Linear Voltage Regulators (LDO) · TO-252-5
NCP5661DTADJRKG from onsemi, in a TO-252-5. 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 | Enable | input | On/off control of the regulator: connect to Ground to disable the device, or to Vin if the function is not used (threshold high 1.3 V min, low 0.3 V max). |
| 2 | Vin | power_in | Positive power supply input voltage, operating range 2.0 V to 9.0 V (absolute maximum 18 V). |
| 3 | Ground | power_in | Power supply ground; the TAB is also connected to Ground. |
| 4 | Vout | power_out | Regulated output voltage, up to 1.0 A load current, requiring output capacitance Cout > 10 µF for stability. |
| 5 | Adj | input | Connected to the resistor divider network that programs the output voltage against the 0.9 V reference (adjustable version, typical Adj pin current 40 nA). |
| 6 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | TO-252-5 |
| Category | Power Supply Chip |
| Pins | 6 |
## Electrical characteristics
Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Input Voltage | Vin | 2 | | 9 | V | Adjustable output version | 3 |
| Output Voltage Accuracy | Vout | -1 | | 1 | % | TJ = 25°C (Iout = 10 mA to 1.0 A) | 3 |
| Output Voltage Accuracy | Vout | -1.5 | | 1.5 | % | TJ = -20 to +125°C (Iout = 10 mA to 1.0 A) | 3 |
| Output Voltage Accuracy | Vout | -2 | | 2 | % | TJ = -40 to +150°C (Iout = 10 mA to 1.0 A) | 3 |
| Dropout Voltage | VDO | | 1 | 1.3 | V | Iout = 1.0 A | 3 |
| Peak Output Current Limit | Iout | 1 | | | A | | 3 |
| Ground Current | Iq | | 1.3 | 3 | mA | Iout = 1.0 A | 3 |
| Disabled State Ground Current | Iqds | | 10 | 300 | A | Disabled State | 3 |
| Enable Input Threshold Voltage High | Ven | 1.3 | | | V | Voltage Increasing, On State, Logic High | 3 |
| Enable Input Threshold Voltage Low | Ven | | | 0.3 | V | Voltage Decreasing, Off State, Logic Low | 3 |
| Output Noise Voltage | Vn | | 26 | | Vrms | f = 10 Hz to 100 kHz | 3 |
| Adjustable Pin Input Current | Iadj | | 40 | | nA | | 3 |
| Line Regulation | REGline | | 0.03 | | % | Iout = 10 mA, Vout+1.5 V < Vin < 7.0 V | 3 |
| Load Regulation | REGload | | 0.03 | | % | 10 mA < Iout < 1.0 A | 3 |
| Internal Current Limitation | Ilim | | 1.5 | | A | | 3 |
| Ripple Rejection | RR | | 70 | | dB | 120 Hz | 3 |
| Ripple Rejection | RR | | 65 | | dB | 1.0 kHz | 3 |
| Thermal Shutdown | TSHD | | 160 | | °C | Guaranteed by Design | 3 |
| Enable Input Current | Ien | | 0.5 | | A | Enable Pin Voltage = 0.3 Vmax | 3 |
| Input Voltage (max rating) | Vin | | | 18 | V | | 2 |
| Output Pin Voltage | Vout | -0.3 | | | V | -0.3 to Vin +0.3 | 2 |
| Adjust Pin Voltage | Vadj | -0.3 | | | V | -0.3 to Vin +0.3 | 2 |
| Enable Pin Voltage | Ven | -0.3 | | | V | -0.3 to Vin +0.3 | 2 |
| Operating Junction Temperature Range | TJ | -40 | | 150 | °C | | 2 |
| Storage Temperature Range | Tstg | -55 | | 150 | °C | | 2 |
| Thermal Resistance, Junction-to-Air | RθJA | | 100 | | °C/W | DPAK-5, 1 oz copper, 0.26 in2 copper area (minimum pad) | 2 |
| Thermal Resistance, Junction-to-Case | RθJC | | 8 | | °C/W | DPAK-5 | 2 |
## CAD (KiCad official)
- Symbol: `NCP5661DTADJRKG`
- Footprint: `Package_TO_SOT_SMD:TO-252-5_TabPin6`
- 3D model: TO-252-5 (KiCad packages3D, STEP)
- 3D model files: `ncp5661dtadjrkg-etched.step` / `ncp5661dtadjrkg-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ncp5661dtadjrkg.step` / `ncp5661dtadjrkg.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/ncp5661dtadjrk-d.pdf) (13 pp, sha256 `a3b1428afdd1ab29`, retrieved 2026-10-23, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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/ncp5661dtadjrkg-datasheet.pdf)