component
MCP16251T-I
Public Made by Adomby adom
Microchip Tech DC-DC Converters, SOT-23-6. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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MCP16251T-I
Microchip Tech · DC-DC Converters · SOT-23-6
MCP16251T-I from Microchip Tech, in a SOT-23-6. 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 | SW | output | Switch node and boost inductor input pin, carrying inductor current up to 650 mA typical peak. |
| 2 | GND | power_in | Ground return pin; in the SOT-23-6 package a single ground pin is used, so trace length from the input and output capacitor returns to GND should be kept as short as possible. |
| 3 | EN | input | Logic-level enable input: a logic high above 70% of VIN enables the regulator output and a logic low below 20% of VIN disables it. |
| 4 | VFB | input | Feedback voltage pin for output regulation through a resistor divider, with feedback typically 1.23V when the output is in regulation. |
| 5 | VOUT | power_out | Output voltage pin that connects the integrated P-Channel MOSFET to the output capacitor, and to which the feedback voltage divider is connected. |
| 6 | VIN | power_in | Input voltage pin that should be decoupled to GND with a 4.7 µF minimum capacitor. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | SOT-23-6 |
| Category | Power Management ICs |
| 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 |
|---|---|---|---|---|---|---|---|
| Output Voltage Adjust Range | VOUT | 1.8 | 5.5 | V | VOUT VIN, Note 2 | 3 | |
| Maximum Output Current | IOUT | 100 | 150 | mA | 1.2V VIN, 2.0V VOUT | 3 | |
| Maximum Output Current | IOUT | 125 | mA | 1.5V VIN, 3.3V VOUT | 3 | ||
| Maximum Output Current | IOUT | 225 | mA | 3.3V VIN, 5.0V VOUT | 3 | ||
| Feedback Voltage | VFB | 1.1931 | 1.23 | 1.2669 | V | 3 | |
| VOUT Quiescent Current | IQOUT | 4 | 8 | µA | IOUT = 0 mA, device not switching, EN = VIN = 4.0V, VOUT = 5.0V, excludes feedback divider current (Note 3) | 3 | |
| VIN Sleep Current | IQIN | 1 | 2.3 | µA | IOUT = 0 mA, EN = VIN (Note 3), (Note 5) | 3 | |
| No Load Input Current | IIN0 | 14 | 25 | µA | IOUT = 0 mA, device is switching | 3 | |
| VOUT Accuracy | VOUT% | -3 | 3 | % | Includes Line and Load Regulation; VIN = 1.5V | 4 | |
| Line Regulation | (VOUT/VOUT)/VIN | -0.4 | 0.3 | 0.4 | %/V | VIN = 1.5V to 2.8V; IOUT = 50 mA | 4 |
| Load Regulation | VOUT/VOUT | -1.5 | 0.1 | 1.5 | % | IOUT = 25 mA to 100 mA; VIN = 1.5V | 4 |
| Maximum Duty Cycle | DCMAX | 87 | 89 | 91 | % | Note 5 | 4 |
| Switching Frequency | fSW | 425 | 500 | 575 | kHz | 4 | |
| EN Input Logic High | VIH | 70 | % of VIN | IOUT = 1 mA | 4 | ||
| EN Input Logic Low | VIL | 20 | % of VIN | IOUT = 1 mA | 4 | ||
| Soft Start Time | tSS | 1.5 | ms | EN Low to High; 90% of VOUT (Note 4), (Note 5) | 4 | ||
| Operating Temperature Range | TJ | -40 | 85 | °C | Steady State | 5 | |
| Storage Temperature Range | TA | -65 | 150 | °C | 5 | ||
| Maximum Junction Temperature | TJ | 150 | °C | Transient | 5 | ||
| Operating Junction Temperature | TJ | -40 | 125 | °C | 3 | ||
| Ambient Temp. with Power Applied | TA | -40 | 85 | °C | 3 | ||
| Storage Temperature | -65 | 150 | °C | 3 | |||
| Supply Voltage Absolute Maximum (EN, VFB, VIN, VSW, VOUT to GND) | 6.5 | V | 3 | ||||
| ESD Protection HBM | 4 | kV | HBM | 3 | |||
| Thermal Resistance, SOT-23, 6-LD | JA | 190.5 | °C/W | EIA/JESD51-3 Standard | 5 |
CAD (KiCad official)
- Symbol:
MCP16251T-I - Footprint:
Package_TO_SOT_SMD:SOT-23-6 - 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files:
mcp16251t-i-etched.step/mcp16251t-i-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mcp16251t-i.step/mcp16251t-i.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Microchip Tech datasheet (33 pp, sha256
042335e2d2d8f46c, retrieved 2026-10-26, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusoff(skipped (clean text read)), 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).
# MCP16251T-I
**Microchip Tech** · DC-DC Converters · SOT-23-6
MCP16251T-I from Microchip Tech, in a SOT-23-6. 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 | SW | output | Switch node and boost inductor input pin, carrying inductor current up to 650 mA typical peak. |
| 2 | GND | power_in | Ground return pin; in the SOT-23-6 package a single ground pin is used, so trace length from the input and output capacitor returns to GND should be kept as short as possible. |
| 3 | EN | input | Logic-level enable input: a logic high above 70% of VIN enables the regulator output and a logic low below 20% of VIN disables it. |
| 4 | VFB | input | Feedback voltage pin for output regulation through a resistor divider, with feedback typically 1.23V when the output is in regulation. |
| 5 | VOUT | power_out | Output voltage pin that connects the integrated P-Channel MOSFET to the output capacitor, and to which the feedback voltage divider is connected. |
| 6 | VIN | power_in | Input voltage pin that should be decoupled to GND with a 4.7 µF minimum capacitor. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | SOT-23-6 |
| Category | Power Management ICs |
| 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 |
|---|---|---|---|---|---|---|---|
| Output Voltage Adjust Range | VOUT | 1.8 | | 5.5 | V | VOUT VIN, Note 2 | 3 |
| Maximum Output Current | IOUT | 100 | 150 | | mA | 1.2V VIN, 2.0V VOUT | 3 |
| Maximum Output Current | IOUT | 125 | | | mA | 1.5V VIN, 3.3V VOUT | 3 |
| Maximum Output Current | IOUT | 225 | | | mA | 3.3V VIN, 5.0V VOUT | 3 |
| Feedback Voltage | VFB | 1.1931 | 1.23 | 1.2669 | V | | 3 |
| VOUT Quiescent Current | IQOUT | | 4 | 8 | µA | IOUT = 0 mA, device not switching, EN = VIN = 4.0V, VOUT = 5.0V, excludes feedback divider current (Note 3) | 3 |
| VIN Sleep Current | IQIN | | 1 | 2.3 | µA | IOUT = 0 mA, EN = VIN (Note 3), (Note 5) | 3 |
| No Load Input Current | IIN0 | | 14 | 25 | µA | IOUT = 0 mA, device is switching | 3 |
| VOUT Accuracy | VOUT% | -3 | | 3 | % | Includes Line and Load Regulation; VIN = 1.5V | 4 |
| Line Regulation | (VOUT/VOUT)/VIN | -0.4 | 0.3 | 0.4 | %/V | VIN = 1.5V to 2.8V; IOUT = 50 mA | 4 |
| Load Regulation | VOUT/VOUT | -1.5 | 0.1 | 1.5 | % | IOUT = 25 mA to 100 mA; VIN = 1.5V | 4 |
| Maximum Duty Cycle | DCMAX | 87 | 89 | 91 | % | Note 5 | 4 |
| Switching Frequency | fSW | 425 | 500 | 575 | kHz | | 4 |
| EN Input Logic High | VIH | 70 | | | % of VIN | IOUT = 1 mA | 4 |
| EN Input Logic Low | VIL | | | 20 | % of VIN | IOUT = 1 mA | 4 |
| Soft Start Time | tSS | | | 1.5 | ms | EN Low to High; 90% of VOUT (Note 4), (Note 5) | 4 |
| Operating Temperature Range | TJ | -40 | | 85 | °C | Steady State | 5 |
| Storage Temperature Range | TA | -65 | | 150 | °C | | 5 |
| Maximum Junction Temperature | TJ | | | 150 | °C | Transient | 5 |
| Operating Junction Temperature | TJ | -40 | | 125 | °C | | 3 |
| Ambient Temp. with Power Applied | TA | -40 | | 85 | °C | | 3 |
| Storage Temperature | | -65 | | 150 | °C | | 3 |
| Supply Voltage Absolute Maximum (EN, VFB, VIN, VSW, VOUT to GND) | | | | 6.5 | V | | 3 |
| ESD Protection HBM | | | | 4 | kV | HBM | 3 |
| Thermal Resistance, SOT-23, 6-LD | JA | | 190.5 | | °C/W | EIA/JESD51-3 Standard | 5 |
## CAD (KiCad official)
- Symbol: `MCP16251T-I`
- Footprint: `Package_TO_SOT_SMD:SOT-23-6`
- 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files: `mcp16251t-i-etched.step` / `mcp16251t-i-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mcp16251t-i.step` / `mcp16251t-i.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Microchip Tech datasheet](https://ww1.microchip.com/downloads/aemDocuments/documents/APID/ProductDocuments/DataSheets/MCP16251-MCP16252-Data-Sheet-DS20005173.pdf) (33 pp, sha256 `042335e2d2d8f46c`, retrieved 2026-10-26, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `off` (skipped (clean text read)), 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/mcp16251t-i-datasheet.pdf)