# 79M15

**YFW** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252

79M15 from YFW, in a TO-252. 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 | GND | power_in | Ground reference pin of the -15V regulator; the input is rated to -35V (absolute maximum) relative to it. |
| 2 | IN | power_in | Negative unregulated input voltage, absolute maximum -35V, recommended -18V to -30V for -15V output; also connected to the tab. |
| 3 | OUT | power_out | Regulated -15V output (-14.40V to -15.60V at 25°C), output current in excess of 1A with internal current limiting. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | YFW |
| Package | TO-252 |
| Category | Power Management (PMIC) |
| Pins | 3 |

## 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 (Tj=25℃) | VO | -14.4 | -15 | -15.6 | V | Tj=25℃ | 2 |
| Line Regulation | ΔVO |  |  | 100 | mV | Tj=25℃, VI=-17.5V~-30V | 2 |
| Line Regulation | ΔVO |  |  | 50 | mV | VI=-18V~-28V | 2 |
| Load Regulation | ΔVO |  |  | 240 | mV | Tj=25℃, IO=5mA~0.75A | 2 |
| Load Regulation | ΔVO |  |  | 12 | mV | IO=0.25A~1A | 2 |
| Quiescent Current | IQ |  |  | 6 | mA | Tj=25℃ | 2 |
| Quiescent Current Change | ΔIQ |  |  | 0.4 | mA | IO=5mA~1A | 2 |
| Quiescent Current Change | ΔIQ |  |  | 0.6 | mA | VI=-17.5V~-30V | 2 |
| Output Voltage Drift | ΔV/ΔT |  | -0.4 |  | mV/℃ | IO=5mA | 2 |
| Output Noise Voltage | VN |  | 40 |  | μV | f=10HZ～100KHZ | 2 |
| Ripple Rejection | RR | 60 |  |  | dB | f=120Hz, VI=-18V～-30V | 2 |
| Dropout Voltage | VD |  |  | 2 | V | Tj=25℃, IO=1A | 2 |
| Short Circuit Current | ISC |  | 230 |  | mA | Tj=25℃ | 2 |
| Peak Current | IPK |  | 1.8 |  | A | Tj=25℃ | 2 |
| Input Voltage | VIN | -35 |  |  | V |  | 1 |
| Power Dissipation | PD |  |  | 1.2 | W |  | 1 |
| Operating Junction Temperature Range | Tj |  |  | 150 | ℃ |  | 1 |
| Storage Temperature Range | Tstg | -65 |  | 150 | ℃ |  | 1 |
| Soldering Temperature | Tsol |  |  | 260 | ℃ | 10 seconds | 1 |

## CAD (KiCad official)

- Symbol: `79M15`
- Footprint: `Package_TO_SOT_SMD:TO-252-2`
- 3D model: TO-252 (KiCad packages3D, STEP)
- 3D model files: `79m15-etched.step` / `79m15-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `79m15.step` / `79m15.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [YFW datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8600732430143660032) (5 pp, sha256 `490d7d4261db8f17`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/79m15-datasheet.pdf)