# MIC2091-1YM5-TR

**Microchip Tech** · Power Distribution Switches · SOT-23-5

MIC2091-1YM5-TR from Microchip Tech, in a SOT-23-5. 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 | VIN | power_in | Supply input from +1.8V to +5.5V that powers the output switch and the internal control circuitry. |
| 2 | GND | power_in | Ground reference pin for the device. |
| 3 | EN | input | Active-high TTL-compatible enable input that turns the internal switch on and supplies power to the load; this pin cannot be left floating. |
| 4 | FAULT/ | output | Open-drain fault status output that must be pulled high with an external resistor and goes low when the part is in current limit, thermal limit, or UVLO while EN=1; it stays high when EN=0. |
| 5 | VOUT | power_out | Switched output controlled by the internal power switch, which connects to the load being driven. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | SOT-23-5 |
| Category | Power Management (PMIC) |
| Pins | 5 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply Voltage (VIN) | VIN | -0.3 |  | 6 | V |  | 3 |
| Output Voltage (VOUT) | VOUT | -0.3 |  | 6 | V |  | 3 |
| FAULT/ Pin Voltage | VFAULT/ | -0.3 |  | 6 | V |  | 3 |
| FAULT/ Pin Current | IFAULT/ |  |  | 25 | mA |  | 3 |
| EN Pin Voltage | VEN | -0.3 |  |  | V | Maximum printed as VIN + 0.3V | 3 |
| Maximum Junction Temperature | TJ |  |  | 150 | °C |  | 3 |
| Storage Temperature | TS | -65 |  | 150 | °C |  | 3 |
| Lead Temperature |  |  |  | 260 | °C | soldering, 10s | 3 |
| ESD HBM Rating |  |  |  | 3 | kV |  | 3 |
| ESD MM Rating |  |  |  | 200 | V |  | 3 |
| Supply Voltage (VIN) | VIN | 1.8 |  | 5.5 | V |  | 3 |
| Output Voltage (VOUT) | VOUT | 1.8 |  | 5.5 | V |  | 3 |
| EN Pin Voltage | VEN | 0 |  |  | V | Maximum printed as VIN | 3 |
| FAULT/ Pin Voltage | VFAULT/ | 0 |  | 5.5 | V |  | 3 |
| FAULT/ Pin Current | IFAULT/ |  |  | 1 | mA |  | 3 |
| Ambient Temperature | TA | -40 |  | 85 | °C |  | 3 |
| Junction Temperature | TJ | -40 |  | 125 | °C |  | 3 |
| Input Voltage Range | VIN | 1.8 |  | 5.5 | V |  | 3 |
| Shutdown Current | IVIN |  | 5 | 10 | µA | VEN ≤ 0.5V (switch off), VOUT = open | 3 |
| Supply Current | IVIN |  | 70 | 110 | µA | VEN ≥ 1.5V (switch on), VOUT = open | 3 |
| Enable Logic Level High | VIH(MIN) | 1.5 |  |  | V |  | 3 |
| Enable Logic Level Low | VIL(MAX) |  |  | 0.5 | V |  | 3 |
| On Resistance MIC2091 | RDS(ON) |  | 700 | 1200 | mΩ | VIN = 5.0V, IOUT = 100mA | 3 |
| On Resistance MIC2091 | RDS(ON) |  | 790 | 1200 | mΩ | VIN = 3.3V, IOUT = 100mA | 3 |
| Current-Limit Threshold MIC2091 | ILIMIT | 100 | 150 | 200 | mA | @ VOUT = 4.5V | 4 |
| Current-Limit Threshold MIC2091 | ILIMIT | 100 | 175 | 250 | mA | @ VOUT = 0V | 4 |
| Time After Switch Shuts Down From An Over-Current Condition Before It Tries To Turn On Again | TAUTORESTART | 30 | 60 | 90 | ms |  | 4 |
| Time After Switch Comes Into Current Limit Before The FAULT/ Pin Is Pulled Low | tD_FAULT/ | 5 | 10 | 20 | ms |  | 4 |
| Under-Voltage Lockout Threshold | VUVLO |  | 1.75 |  | V | VIN rising | 3 |
| Under-Voltage Lockout Threshold Hysteresis | VUVLO_HYS |  | 100 |  | mV |  | 3 |
| Enable Bias Current | IEN |  | 0.1 |  | µA | VEN = 5V | 3 |
| Output Turn-On Delay | tON |  | 215 |  | µs | RL = 500Ω, CL = 0.1µF | 3 |
| Output Turn-On Rise Time | tR |  | 5 |  | µs | RL = 500Ω, CL = 0.1µF | 3 |
| Output Turn-Off Delay | tOFF |  | 125 |  | µs | RL = 500Ω, CL = 0.1µF | 3 |
| Output Turn-Off Fall Time | tF |  | 115 |  | µs | RL = 500Ω, CL = 0.1µF | 3 |
| On Resistance MIC2091 | RDS(ON) |  | 1300 |  | mΩ | VIN = 1.8V, IOUT = 100mA | 3 |
| Input-to-Output Leakage Current (Forward Leakage Current) |  |  | 10 |  | μA | VEN ≤ 0.5V, (output off), VIN = 5.5V, VOUT = 0V | 3 |
| Output-to-Input Leakage Current (Reverse Leakage Current) |  |  | 10 |  | µA | VEN ≤ 0.5V, (output off), VOUT = 5.5V, VIN = 0V | 4 |
| Short-Circuit Response Time | tSC_RESP |  | 20 |  | ns | Short circuit applied to output after switch is turned on; VIN = 3.3V | 4 |
| Error Flag Output Voltage |  |  | 0.4 |  | V | Output voltage high (1mA Sinking) | 4 |
| FAULT/ Rising Time | tR_FAULT/ |  | 5 |  | µs | FAULT/ connected to VIN = 5V through 10kΩ and 100pF in parallel | 4 |
| FAULT/ Falling Time | tF_FAULT/ |  | 1 |  | µs |  | 4 |
| OGI Output Voltage Greater Than Input Voltage | OGI |  | 85 |  | mV |  | 4 |
| OGI Time (output voltage greater than input before shutdown) | OGITIME |  | 10 |  | ms |  | 4 |
| Over-Temperature Shutdown | TOVERTEMP |  | 150 |  | °C | TJ Rising | 4 |
| Over-Temperature Shutdown | TOVERTEMP |  | 140 |  | °C | TJ Falling | 4 |

## CAD (KiCad official)

- Symbol: `MIC2091-1YM5-TR`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `mic2091-1ym5-tr-etched.step` / `mic2091-1ym5-tr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mic2091-1ym5-tr.step` / `mic2091-1ym5-tr.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Microchip Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588881255509741568) (23 pp, sha256 `28dbce7d4bcce8c0`, retrieved 2026-10-18, tier: lcsc)
- **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/mic2091-1ym5-tr-datasheet.pdf)