component
LM7909CT
Public Made by Adomby adom
HGSEMI Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-220-3. 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
markdownLM7909CT
HGSEMI · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-220-3
LM7909CT from HGSEMI, in a TO-220-3. 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 negative regulator, shown as GND on the TO-220-3 pin drawing. |
| 2 | INPUT | power_in | Unregulated negative input voltage, maximum -35 V at TJ=25°C, with -10.5 V to -25 V specified for the LM7909C output voltage limits. |
| 3 | OUTPUT | power_out | Regulated negative output of -8.60 V to -9.40 V at 5.0 mA to 1.0 A load, with internal short-circuit current limiting and output current in excess of 1.5 A. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HGSEMI |
| Package | TO-220-3 |
| 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 | -8.6 | -9.4 | V | -10.5V ≤ VIN ≤ -25V, 5.0mA ≤ IO ≤ 1.0A | 4 | |
| Line Regulation | ∆UV | 86 | mV | IO = 100mA, -11.8V ≤ VIN ≤ -25V | 4 | ||
| Line Regulation | ∆UV | 43 | mV | IO = 100mA, -12V ≤ VIN ≤ -20V | 4 | ||
| Line Regulation | ∆UV | 172 | mV | IO = 500mA, -11.8V ≤ VIN ≤ -25V | 4 | ||
| Load Regulation | ∆UI | 171 | mV | 5.0mA ≤ IO ≤ 1.5 A | 4 | ||
| Load Regulation | ∆UI | 86 | mV | 250mA ≤ IO ≤ 750mA | 4 | ||
| Quiescent Current | IB | 7.8 | mA | 4 | |||
| Quiescent Current Change | ∆IB | 1.02 | mA | -10.5V ≤ VIN ≤ -25V | 4 | ||
| Quiescent Current Change | ∆IB | 0.48 | mA | 5.0mA ≤ IO ≤ 1.5 A | 4 | ||
| Maximum Input Voltage at TJ=25°C | VIN | -35 | V | TJ=25°C | 2 | ||
| Maximum Operating Junction Temperature | TJ | 125 | ℃ | 2 | |||
| Lead Temperature (Soldering, 10 seconds) | TL | 245 | ℃ | Soldering, 10 seconds | 2 | ||
| Operating Temperature Range | 0 | 125 | ℃ | 2 |
CAD (KiCad official)
- Symbol:
LM7909CT - Footprint:
Package_TO_SOT_THT:TO-220-3_Vertical - 3D model: TO-220-3 (KiCad packages3D, STEP)
- 3D model files:
lm7909ct-etched.step/lm7909ct-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm7909ct.step/lm7909ct.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HGSEMI datasheet (10 pp, sha256
c70f3a4452f8948a, retrieved 2026-11-05, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-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).