component
79L09
Public Made by Adomby adom
DOWO Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdown79L09
DOWO · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89
79L09 from DOWO, in a SOT-89. 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, labeled GND on the package pinout, with no separate electrical limit stated in the datasheet. |
| 2 | VIN | power_in | Negative unregulated input rated up to -30 V (absolute maximum input voltage 30 V), with electrical characteristics specified at VI = -15 V and ripple rejection tested from VI = -12 V to -22 V. |
| 3 | VOUT | power_out | Negative regulated output with a nominal -9 V level (8.64 V to 9.36 V at VI = -15 V and IO = 40 mA), and load regulation specified for output currents of 1 mA to 100 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | DOWO |
| Package | SOT-89 |
| 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 | -VO | 8.64 | 9 | 9.36 | V | VI=-15V,IO=40mA | 2 |
| Line Regulation | △VO | 27 | 200 | mV | VI=-12.5~-24V,IO=40mA | 2 | |
| Load Regulation | △VO | 12 | 90 | mV | VI=-15V,IO=1~100mA | 2 | |
| Ripple Rejection | RR | 38 | 67 | dB | VI=-12V to -22V, f=150Hz, IO=40mA, ein=1Vp-p | 2 | |
| Quiescent Current | IQ | 2 | 6 | mA | VI=-15V,IO=40mA | 2 | |
| Input Voltage | -VI | 30 | V | 1 | |||
| Junction Temperature | TJ | 150 | °C | 1 | |||
| Storage Temperature Range | TSTG | -65 | 150 | °C | 1 | ||
| Operating Temperature Range | TOPR | 0 | 125 | °C | 1 |
CAD (KiCad official)
- Symbol:
79L09 - Footprint:
Package_TO_SOT_SMD:SOT-89-3 - 3D model: SOT-89 (KiCad packages3D, STEP)
- 3D model files:
79l09-etched.step/79l09-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);79l09.step/79l09.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: DOWO datasheet (4 pp, sha256
e10a20c16fb889f9, retrieved 2026-11-05, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-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).