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L7815 15 V Linear Regulator

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by Ray

Fixed 15 V positive-voltage linear regulator, up to 1.5 A, in the L78xx (7800) series.

regulatorlinearfixedpositivepmicstto-220
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L7815

STMicroelectronics · Linear Regulator (LDO) · TO-220

The L7815 is a three-terminal fixed positive-voltage regulator from ST's L78xx (7800) series, delivering a stable 15 V output at up to 1.5 A with adequate heat sinking. It powers logic and analog rails from a higher unregulated supply, needing only input and output capacitors.

Pinout

Pin Name Type Function
1 INPUT power_in Unregulated DC input. Must be at least ~2 V above V_O for regulation (typical dropout ~2 V). Absolute maximum V_I = 35 V. A 0.33 µF ceramic bypass capacitor from INPUT to GROUND is recommended close to the device.
2 GROUND power_in Common ground reference for the input and output. Electrically connected to the metal tab / heat-slug on TO-220, TO-220FP, DPAK and D²PAK packages. Carries the quiescent current back to the source.
3 OUTPUT power_out Regulated +15 V output. Delivers up to 1.5 A with adequate heat sinking. A 0.1 µF ceramic capacitor from OUTPUT to GROUND is recommended for output stability and transient response.

Key specifications

Parameter Value
Type Fixed positive linear regulator
Output voltage 15 V
Output current Up to 1.5 A (with heatsink)
Dropout voltage 2 V typ
Package TO-220 (3-lead)
Operating temperature 0 C to 125 C (junction)

Ordering variants

Same part, different packaging or reel option.

  • L7815CV
  • L7815CP
  • L7815CDT
  • L7815CDT-TR
  • L7815CD2T
  • L7815CD2T-TR

CAD (KiCad official)

  • Symbol: l7815.kicad_sym
  • Footprint: l7815.kicad_mod
  • 3D model: TO-220 body from KiCad Package_TO_SOT_THT/TO-220-3_Vertical.

Provenance

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

  • Datasheet: STMicroelectronics datasheet (55 pp, sha256 ccba643d1b7ced87, 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