L7805CP

The L7805CP is a fixed 5V linear voltage regulator of the 78xx family. It takes a higher input voltage and regulates it down to a stable 5V, with typical output current up to about 1 A (requires adequate heat sinking).
Key points:
- Input range: roughly 7–25 V; Output: 5 V. Dropout is around ~2 V at full load.
- Package/pins: commonly a TO-220 3-pin package (Pin 1 = Input, Pin 2 = Ground, Pin 3 = Output). Check the exact datasheet for pinouts and tab connection.
- Protection: includes short‑circuit protection and thermal shutdown.
- Stabilization: use input and output capacitors for stability (typical: ~0.33 µF on input and ~0.1 µF on output; add larger bulk caps (e.g., 10–100 µF) if needed).
- Power/heat: P = (Vin − Vout) × Iout; heat dissipation requires proper heatsinking at higher currents or Vin.
- Applications: simple 5V rails for microcontrollers, sensors, small embedded boards, hobby electronics.
In short, it’s a cheap, easy way to get a regulated 5V from a higher voltage source, with caveats about efficiency and heat.

L7805CP features (concise):
- 5 V fixed output
- Output current up to ~1.5 A (with adequate heatsinking)
- Wide input range up to about 25 V
- Low dropout around 2 V at full load
- On-chip current limiting and thermal/shutdown protection
- Short-circuit and safe-area protection
- Requires only minimal external components; typical input cap ~0.33 μF and output cap ~0.1 μF for stability
- Three-terminal positive regulator in TO-220 plastic package; tab tied to output

TO-220 plastic package (through-hole), three terminals with a metal heat-sink tab.

3-pin device. Pinout (viewed from the front, left to right): Pin 1 = Input, Pin 2 = Ground, Pin 3 = Output (+5V). The tab is typically tied to Ground.

Manufacturer: STMicroelectronics (ST).
What kind of company: A multinational electronics and semiconductor company headquartered near Geneva, Switzerland, and one of the world’s largest semiconductor manufacturers.

General-purpose 5V linear regulator (L7805CP) to create a stable +5V rail from higher DC inputs in low-to-moderate current apps.
Applications:
- Power microcontrollers and digital logic (Arduino, PIC, AVR, ARM)
- Embedded systems and development boards
- Consumer electronics, small appliances, prototyping/hobby projects
Note: requires input/output capacitors and adequate heatsinking.

Equivalent 5V, 3-terminal regulators to L7805CP include:
- LM7805 (and LM7805CV/LM7805CT)
- MC7805 (Motorola/ON Semi)
- KA7805 (Fairchild)
- UA7805 / uA7805 (NEC/other vendors)
- L7805CV (STMicroelectronics)
Note: pinouts and thermal specs vary by manufacturer/package; verify datasheets before substituting.