component
MC79L12ABPRAG
Public Made by Adomby adom
onsemi Linear Voltage Regulators (LDO), TO-92. 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
markdownMC79L12ABPRAG
onsemi · Linear Voltage Regulators (LDO) · TO-92
MC79L12ABPRAG from onsemi, in a TO-92. 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 (common) reference pin; a common ground is required between the input and output voltages, and the regulator has no external sense lead, so ground-loop and lead-resistance drops should be minimized. |
| 2 | Input | power_in | Negative unregulated input with a maximum rating of −35 V for the −12 V device, which must remain typically 2.0 V above the output voltage even at the low point of the ripple, and should be bypassed with a 0.33 µF or larger capacitor when far from the supply filter. |
| 3 | Output | power_out | Regulated negative output of −12 V nominal, specified for output currents up to 100 mA, with a 0.1 µF output capacitor recommended to improve stability and transient response. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | TO-92 |
| Category | Power Supply Chip |
| 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 C) | VO | -11.5 | -12 | -12.5 | Vdc | TJ = +25 C | 3 |
| Input Regulation | Regline | 250 | mV | TJ = +25 C; -14.5 Vdc VI -27 Vdc | 3 | ||
| Input Regulation | Regline | 200 | mV | TJ = +25 C; -16 Vdc VI -27 Vdc | 3 | ||
| Load Regulation | Regload | 100 | mV | TJ = +25 C, 1.0 mA IO 100 mA | 3 | ||
| Load Regulation | Regload | 50 | mV | 1.0 mA IO 40 mA | 3 | ||
| Output Voltage | VO | -11.4 | -12.6 | Vdc | -14.5 Vdc VI -27 Vdc, 1.0 mA IO 40 mA | 3 | |
| Input Bias Current | IIB | 6.5 | mA | TJ = +25 C | 3 | ||
| Input Bias Current | IIB | 6 | mA | TJ = +125 C | 3 | ||
| Input Bias Current Change | IIB | 1.5 | mA | -16 Vdc VI -27 Vdc | 3 | ||
| Input Bias Current Change | IIB | 0.2 | mA | 1.0 mA IO 40 mA | 3 | ||
| Ripple Rejection | RR | 37 | 42 | dB | -15 VI -25 Vdc, f = 120 Hz, TJ = +25 C | 3 | |
| Input Voltage (-12 V device) | VI | -35 | Vdc | -12, -15, -18 V devices | 2 | ||
| Storage Temperature Range | Tstg | -65 | 150 | C | 2 | ||
| Junction Temperature | TJ | 150 | C | 2 | |||
| Operating Junction Temperature (MC79LXXAB) | TJ | -40 | 125 | C | MC79LXXAB | 3 | |
| Output Noise Voltage | Vn | 80 | V | TA = +25 C, 10 Hz f 100 kHz | 3 | ||
| Dropout Voltage | /VI-VO/ | 1.7 | Vdc | IO = 40 mA, TJ = +25 C | 3 | ||
| Thermal Resistance, Junction-to-Ambient (TO-92, Case 29) | RJA | 160 | C/W | TO-92 Case 29, TA = 25 C | 2 | ||
| Thermal Resistance, Junction-to-Case (TO-92, Case 29) | RJC | 83 | C/W | TO-92 Case 29 | 2 |
CAD (KiCad official)
- Symbol:
MC79L12ABPRAG - Footprint:
Package_TO_SOT_THT:TO-92_Inline - 3D model: TO-92 (KiCad packages3D, STEP)
- 3D model files:
mc79l12abprag-etched.step/mc79l12abprag-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mc79l12abprag.step/mc79l12abprag.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: onsemi datasheet (15 pp, sha256
3b8ec4831b4ba3d5, retrieved 2026-10-18, 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).