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LR78M12D

Public Made by Adom

by adom

LRC Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-252. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentpower management (pmic)lr78m12dfactory-2.0.0extractor-text
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Datasheet

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Contents

README

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LR78M12D

LRC · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-252

LR78M12D from LRC, in a TO-252. 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 INPUT input Unregulated input to the regulator; the absolute maximum input voltage is 35 V for the 5 V to 18 V output versions (40 V for 24 V).
2 GND power_in Ground reference pin for the regulator, shown as pin 2 in the pin assignment; the datasheet gives no separate electrical rating for it.
3 OUTPUT power_out Regulated 12 V output for the LR78M12, specified at 11.5 V to 12.5 V (11.4 V to 12.6 V over line) with output current up to 0.5 A.

Key specifications

Parameter Value
Manufacturer LRC
Package TO-252
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 5
Output Voltage VO 11.4 12 12.6 V IO = 5mA to 350mA, VI = 14.5V to 27V 5
Line Regulation ΔVO 100 mV IO = 200mA, TJ = +25°C, VI = 14.5V to 30V 5
Line Regulation ΔVO 50 mV IO = 200mA, TJ = +25°C, VI = 16V to 30V 5
Load Regulation ΔVO 240 mV IO = 5mA to 0.5A, TJ = +25°C 5
Load Regulation ΔVO 120 mV IO = 5mA to 200mA, TJ = +25°C 5
Quiescent Current IQ 4.1 6 mA TJ = +25°C 5
Quiescent Current Change ΔIQ 0.5 mA IO = 5mA to 350mA 5
Quiescent Current Change ΔIQ 0.8 mA VI = 14.5V to 30V 5
Input Voltage (for VO = 5V to 18V) VI 35 V for VO = 5V to 18V 2
Operating Junction Temperature Range Tj 0 150 °C 2
Storage Temperature Range TSTG -65 150 °C 2
Operating Ambient Temperature TOPR -40 85 °C 2
Output Voltage Drift ΔV/ΔT -0.5 mV/°C IO = 5mA, TJ = 0 to +125°C 5
Output Noise Voltage VN 75 μV/Vo f = 10Hz to 100kHz 5
Ripple Rejection RR 80 dB f = 120Hz, IO = 300mA, VI = 15V to 25V, TJ = +25°C 5
Dropout Voltage VD 2 V TJ = +25°C, IO = 500mA 5
Short Circuit Current ISC 300 mA TJ = +25°C, VI = 35V 5
Peak Current IPK 700 mA TJ = +25°C 5
Thermal Resistance Junction-Air (D-PAK) RθJA 92 °C/W D-PAK, Ta = +25°C; Note 1 (JESD51-3/-7 test board), Note 2 (no ambient airflow) 2

CAD (KiCad official)

  • Symbol: LR78M12D
  • Footprint: Package_TO_SOT_SMD:TO-252-2
  • 3D model: TO-252 (KiCad packages3D, STEP)
  • 3D model files: lr78m12d-etched.step / lr78m12d-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lr78m12d.step / lr78m12d.glb are the bare package body.

Provenance

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

  • Datasheet: LRC datasheet (11 pp, sha256 48b0ea17bd097b96, retrieved 2026-10-17, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-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).

Datasheet PDF