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L78L12ABZ

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STMicroelectronics Voltage Reference, TO-92-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
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docs l78l12abz: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
viewers l78l12abz: viewers · Ray 1mo ago
l78l12abz-etched.fit.json l78l12abz: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
l78l12abz-etched.glb l78l12abz: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
l78l12abz-etched.step l78l12abz: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
l78l12abz.glb Publish 0.1.0 · Ray 1mo ago
l78l12abz.kicad_mod Publish 0.1.0 · Ray 1mo ago
l78l12abz.kicad_sym Publish 0.1.0 · Ray 1mo ago
l78l12abz.lbr Publish 0.1.0 · Ray 1mo ago
l78l12abz.step Publish 0.1.0 · Ray 1mo ago
package.json l78l12abz: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding) · Ray 1mo ago
page.json l78l12abz: specified limits as data (metadata.characteristics, 18 rows from the datasheet) · Ray 26d ago
README.md l78l12abz: specified limits as data (metadata.characteristics, 18 rows from the datasheet) · Ray 26d ago

L78L12ABZ

STMicroelectronics · Voltage Reference · TO-92-3

L78L12ABZ from STMicroelectronics, in a TO-92-3. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 VOUT power_out Regulated positive output voltage pin, nominal 12 V (±4% for the A grade), capable of delivering up to 100 mA output current with a 0.1 µF output capacitor recommended.
2 GND power_in Common/ground reference pin for the regulator.
3 VIN power_in Unregulated DC input voltage pin, rated up to 35 V absolute maximum for the 12 V output version, with a 0.33 µF input capacitor recommended if the device is located far from the filter capacitor.

Key specifications

Parameter Value
Manufacturer STMicroelectronics
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 VO 11.5 12 12.5 V TJ = 25 °C 12
Output voltage VO 11.4 12.6 V IO = 1 to 40 mA, VI = 14.5 to 27 V 12
Line regulation ΔVO 250 mV VI = 14.5 to 27 V, TJ = 25 °C 12
Line regulation ΔVO 200 mV VI = 16 to 27 V, TJ = 25 °C 12
Load regulation ΔVO 100 mV IO = 1 to 100 mA, TJ = 25 °C 12
Load regulation ΔVO 50 mV IO = 1 to 40 mA, TJ = 25 °C 12
Quiescent current Id 6.5 mA TJ = 25 °C 12
Quiescent current Id 6 mA TJ = 125 °C 12
Quiescent current change ΔId 0.1 mA IO = 1 to 40 mA 12
Quiescent current change ΔId 1.5 mA VI = 16 to 27 V 12
Supply voltage rejection SVR 37 42 dB VI = 15 to 25 V, f = 120 Hz, IO = 40 mA, TJ = 25 °C 12
Dropout voltage Vd 1.7 V 12
Output noise voltage eN 80 µV B = 10 Hz to 100 kHz, TJ = 25 °C 12
DC input voltage VI 35 V VO = 12 to 15 V 4
Output current IO 100 mA 4
Storage temperature range TSTG -65 150 °C 4
Operating junction temperature range TOP -40 125 °C for L78LxxAB 4
Thermal resistance junction-ambient RthJA 200 °C/W TO-92 package 4

CAD (KiCad official)

  • Symbol: L78L12ABZ
  • Footprint: Package_TO_SOT_THT:TO-92_Inline
  • 3D model: TO-92-3 (KiCad packages3D, STEP)
  • 3D model files: l78l12abz-etched.step / l78l12abz-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); l78l12abz.step / l78l12abz.glb are the bare package body.

Provenance

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

  • Datasheet: STMicroelectronics datasheet (40 pp, sha256 19755abefe19a8b0, retrieved 2026-09-23, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.2, primary claude-sonnet-5 (text+vision), consensus claude-opus-4-8 (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