# P2576L-50-TQ5-R

**UTC(Unisonic Tech)** · DC-DC Converters · TO-263-5

P2576L-50-TQ5-R from UTC(Unisonic Tech), in a TO-263-5. 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 | Input voltage pin; the device accepts an input voltage range from 7V to 40V. |
| 2 | VOUT | power_out | Output voltage pin, driven by the internal output switch, which is limited by cycle-by-cycle current limiting (ILIMIT 4.2 to 6.9 A). |
| 3 | GND | power_in | Ground pin for the device. |
| 4 | FB | input | Feedback pin; the adjustable version regulates to a 1.23 V reference (VFB 1.193 V to 1.267 V), and the fixed versions use this pin for output voltage feedback. |
| 5 | ON/OFF | input | Shutdown control pin; connecting it to ground enables normal operation, and it is TTL-compatible with VIH at least 2.2 V and VIL at most 1.0 V, where 5 V turns the device off with about 50 µA standby current. |
| 6 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | UTC(Unisonic Tech) |
| Package | TO-263-5 |
| 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 |
|---|---|---|---|---|---|---|---|
| Feedback Voltage (5.0V output) |  | 4.8 | 5 | 5.2 | V | 8V≤VIN≤40V, 0.5A≤ILOAD≤3A | 4 |
| Oscillator Frequency | fOSC | 42 | 52 | 63 | kHz | (Note 4) | 4 |
| Saturation Voltage | VSAT |  | 1.4 | 1.8 | V | IOUT=3A (Note 1) | 4 |
| Max Duty Cycle (ON) | DC | 93 | 98 |  | % | (Note 2) | 4 |
| Current Limit | ILIMIT | 4.2 | 5.8 | 6.9 | A | (Note 1, 4) | 4 |
| Output Leakage Current | II(LEAK) |  |  | 2 | mA | VIN=40V, Output=-1V (Note 3) | 4 |
| Output Leakage Current | II(LEAK) |  | 7.5 | 30 | mA | Output=-1V | 4 |
| Quiescent Current | IQ |  | 5 | 10 | mA | (Note 3) | 4 |
| Standby Quiescent Current | ISTBY |  | 50 | 200 | μA | ON/ OFF Pin=5V (OFF) | 4 |
| ON/OFF Pin Logic Input Level (high) | VIH | 2.2 |  |  | V | VOUT=0V | 4 |
| ON/OFF Pin Logic Input Level (low) | VIL |  |  | 1 | V | VOUT=Nominal Output Voltage | 4 |
| ON/OFF Pin Input Current (high) | IIΗ |  | 12 | 30 | μA | ON/ OFF Pin=5V (OFF) | 4 |
| ON/OFF Pin Input Current (low) | IIL |  | 0 | 10 | μA | ON/ OFF Pin=5V (ON) | 4 |
| Oscillator Frequency Tolerance | fOSC | -10 |  | 10 | % | Oscillator frequency, stated in Description | 1 |
| Supply Voltage | VCC |  |  | 40 | V |  | 4 |
| Maximum Supply Voltage | VCC(MAX) |  |  | 45 | V |  | 4 |
| ON/OFF Pin Input Voltage | VON/OFF | -0.3 |  |  | V | Upper limit printed as VIN | 4 |
| Output Voltage to Ground (Steady State) | VOUT | -1 |  |  | V | Steady State | 4 |
| Junction Temperature | TJ |  |  | 150 | °C |  | 4 |
| Operating Temperature | TOPR | -40 |  | 125 | °C |  | 4 |
| Storage Temperature | TSTG | -65 |  | 150 | °C |  | 4 |
| Input Voltage Range | VIN | 7 |  | 40 | V | Stated in Features | 1 |

## CAD (KiCad official)

- Symbol: `P2576L-50-TQ5-R`
- Footprint: `Package_TO_SOT_SMD:TO-263-5_TabPin6`
- 3D model: TO-263-5 (KiCad packages3D, STEP)
- 3D model files: `p2576l-50-tq5-r-etched.step` / `p2576l-50-tq5-r-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `p2576l-50-tq5-r.step` / `p2576l-50-tq5-r.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [UTC(Unisonic Tech) datasheet](docs/p2576l-50-tq5-r-datasheet.pdf) (8 pp, sha256 `8e50d411606da1ad`, retrieved 2026-10-30, 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/p2576l-50-tq5-r-datasheet.pdf)