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mc7912bd2tr4g

Public Made by Adom

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onsemi Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, D2PAK. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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Contents

README

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MC7912BD2TR4G

onsemi · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · D2PAK

MC7912BD2TR4G from onsemi, in a D2PAK. 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 GND power_in Ground reference. Common ground required between input and output voltages. In the D2PAK package, the heatsink tab (shown as terminal 4 in the case outline) is internally connected to Pin 2 (Input), NOT to this ground pin.
2 VI power_in Negative input voltage. Must remain typically 2.0 V more negative than VO even during the high point of the input ripple (dropout ≈ 1.3 V typ at IO = 1.0 A). Absolute maximum VI = −35 Vdc for the −12 V option. Recommended input bypass: 0.33 μF tantalum or equivalent low-ESR cap mounted with short leads.
3 VO power_out Regulated −12 V output. Nominal VO = −12 V with ±4% tolerance (VO = −11.5 V to −12.5 V at TJ = +25°C for the MC7912B grade). Delivers >1.0 A with adequate heatsinking; internally current-limited and thermally protected. A 1.0 μF output capacitor is recommended for stability and transient response.

Key specifications

Parameter Value
Manufacturer onsemi
Package D2PAK
Category PMIC
Pins 3

Ordering variants

  • MC7912BD2TR4G
  • MC7912BD2TR4GBD2TG
  • MC7912BD2TR4GACD2T
  • MC7912BD2TR4GACD2TG
  • MC7912BD2TR4GACD2TR4
  • MC7912BD2TR4GACD2TR4G
  • MC7912BD2TR4GCD2T
  • MC7912BD2TR4GCD2TG
  • MC7912BD2TR4GCD2TR4
  • MC7912BD2TR4GCD2TR4G
  • MC7912BD2TR4GBT
  • MC7912BD2TR4GBTG
  • MC7912BD2TR4GACT
  • MC7912BD2TR4GACTG
  • MC7912BD2TR4GCT
  • MC7912BD2TR4GCTG

CAD (KiCad official)

  • Symbol: MC7912BD2TR4G
  • Footprint: Package_TO_SOT_SMD:TO-263-2
  • 3D model: D2PAK (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: onsemi datasheet (None pp, sha256 01e22db47f1a6088, retrieved 2026-08-17, tier: manufacturer)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF

Symbol & Footprint

Schematic Symbol

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PCB Footprint

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Datasheet

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