The L7808 is a three-terminal fixed positive-voltage regulator from ST's L78xx (7800) series, delivering a stable 8 V output at up to 1.5 A with adequate heat sinking. It is the classic linear regulator for powering 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 voltage. Absolute maximum V_I = 35 V for 5-18 V output variants. Bypass with a 0.33 µF ceramic to ground close to the pin to suppress oscillation and improve transient response.
2	GROUND	power_in	Common ground reference for input and output. Electrically connected to the metal tab of the TO-220 package; the tab must be considered live at GND potential when heatsinking.
3	OUTPUT	power_out	Regulated +8 V output (2% tolerance on A-version). Delivers up to 1.5 A output current with adequate heatsinking. Bypass with a 0.1 µF ceramic to ground for stability and load-transient response.

Key specifications

Parameter	Value
Type	Fixed positive linear regulator
Output voltage	8 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.

L7808CV
L7808CP
L7808CDT-TR
L7808CD2T-TR

CAD (KiCad official)

Symbol: l7808.kicad_sym
Footprint: l7808.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

L7808 8 V Linear Regulator

3D Model

Symbol & Footprint

Schematic Symbol

PCB Footprint

Datasheet

README

L7808

Pinout

Key specifications

Ordering variants

CAD (KiCad official)

Provenance