component
LM79L09
Public Made by Adomby adom
HTC Korea TAEJIN Tech Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-92-3. 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
markdownLM79L09
HTC Korea TAEJIN Tech · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-92-3
LM79L09 from HTC Korea TAEJIN Tech, in a TO-92-3. 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 for the regulator (pin 1 in the TO-92/SOT-89 3-lead pin description table). |
| 2 | VIN | power_in | Input voltage pin; for the LM79L09 the recommended input is -11.5 V to -24 V, and the absolute maximum input voltage for LM79L05 to LM79L09 is -30 V. |
| 3 | VOUT | power_out | Regulated negative output (-9 V nominal for LM79L09), supplying up to 100 mA of output current. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HTC Korea TAEJIN Tech |
| Package | TO-92-3 |
| 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 (25℃, 1mA≤Io≤40mA, -11V≤VIN≤-24V) | VOUT | -8.64 | -9 | -9.36 | V | 25℃; 1mA ≤ Io ≤ 40mA; -11V ≤ VIN ≤ -24V | 6 |
| Output Voltage (0℃~125℃, 1mA≤Io≤40mA, -11V≤VIN≤-24V) | VOUT | -8.55 | 9 | -9.45 | V | 0℃ ~ 125℃; 1mA ≤ Io ≤ 40mA; -11V ≤ VIN ≤ -24V | 6 |
| Output Voltage (0℃~125℃, 1mA≤Io≤70mA) | VOUT | -8.55 | 9 | -9.45 | V | 0℃ ~ 125℃; 1mA ≤ Io ≤ 70mA | 6 |
| Line Regulation (25℃, -11V≤VIN≤-24V) | ΔVLINE | 80 | 200 | mV | 25℃; -11V ≤ VIN ≤ -24V | 6 | |
| Line Regulation (25℃, -12V≤VIN≤-24V) | ΔVLINE | 20 | 160 | mV | -12V ≤ VIN ≤ -24V | 6 | |
| Load Regulation (25℃, 1mA≤Io≤100mA) | ΔVLOAD | 17 | 90 | mV | 25℃; 1mA ≤ Io ≤ 100mA | 6 | |
| Load Regulation (25℃, 1mA≤Io≤40mA) | ΔVLOAD | 8 | 45 | mV | 25℃; 1mA ≤ Io ≤ 40mA | 6 | |
| Bias Current (25℃) | IB | 3.8 | 6.5 | mA | 25℃ | 6 | |
| Bias Current (125℃) | IB | 6 | mA | 125℃ | 6 | ||
| Bias Current Change (0℃~125℃) | ΔIB | 1.5 | mA | -12V ≤ VIN ≤ -24V; 0℃ ~ 125℃ | 6 | ||
| Bias Current Change | ΔIB | 0.1 | mA | 1mA ≤ Io ≤ 40mA | 6 | ||
| Ripple Rejection (f=120Hz, 25℃) | RR | 35 | 43 | dB | -8V ≤ VIN ≤ -18V, f=120Hz, 25℃ | 6 | |
| Dropout Voltage (25℃) | VD | 1.7 | V | 25℃ | 6 | ||
| Output Noise Voltage (10Hz≤f≤100kHz, 25℃) | VN | 64 | uV | 10Hz ≤ f ≤ 100kHz, 25℃ | 6 | ||
| Input Voltage (LM79L05 ~ LM79L09) | VIN | -30 | V | LM79L05 ~ LM79L09 | 1 | ||
| Maximum Power Dissipation at TA = 25°C (TO-92) | PDMax | 0.77 | W | TA = 25°C; TO-92 | 1 | ||
| Thermal Resistance Junction-To-Ambient (TO-92) | θJA | 162 | ℃/W | TO-92 | 1 | ||
| Lead Temperature (Soldering, 10 sec) | TSOL | 260 | ℃ | 10 sec soldering | 1 | ||
| Storage Temperature Range | TSTG | -65 | 150 | ℃ | 1 | ||
| Operating Junction Temperature Range (absolute maximum) | TJOPR | 0 | 150 | ℃ | 1 | ||
| Input Voltage (recommended, LM79L09) | VIN | -11.5 | -24 | V | LM79L09 | 2 | |
| Output Current | Io | 100 | mA | 2 | |||
| Operating Virtual Junction Temperature | TJ | 0 | 125 | ℃ | 2 |
CAD (KiCad official)
- Symbol:
LM79L09 - Footprint:
Package_TO_SOT_THT:TO-92_Inline - 3D model: TO-92-3 (KiCad packages3D, STEP)
- 3D model files:
lm79l09-etched.step/lm79l09-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm79l09.step/lm79l09.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HTC Korea TAEJIN Tech datasheet (10 pp, sha256
0d20c07443475a7e, retrieved 2026-10-17, 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).