L7809CP
9V Positive Linear Voltage RegulatorThe L7809CP is a 9v positive linear voltage regulator from STMicroelectronics. View the full L7809CP datasheet below including key specifications, absolute maximum ratings.
L7809CP shares its datasheet with L7809CV, whose page lists every part number it covers.
Official L7809CP datasheet (PDF) — the source this page was extracted from.
L7809CP Key Specifications
| Parameter | Value |
|---|---|
| Output Current | up to 1.5A |
| Output Voltage | 9V (8.65V to 9.35V at TJ=25°C) |
| Dropout Voltage | 2V typ at IO=1A |
| Line Regulation | 180mV max (VI=11.5 to 26V) |
| Load Regulation | 180mV max (IO=5mA to 1.5A) |
| Quiescent Current | 8mA max |
| Input Voltage (Max) | 35V |
| Storage Temperature | -65°C to 150°C |
| Operating Junction Temperature | 0°C to 150°C |
| Thermal Resistance Junction-Case | 5°C/W (TO-220FP) |
| Thermal Resistance Junction-Ambient | 60°C/W (TO-220FP) |
L7809CP Overview
Part: L7800 series — STMicroelectronics
Type: Positive Voltage Regulator
Description: The L7800 series is a family of three-terminal positive voltage regulators offering fixed output voltages from 5 V to 24 V, capable of delivering over 1 A output current with adequate heat sinking.
Operating Conditions:
- Operating junction temperature: -55 to 150 °C (for L7800), 0 to 150 °C (for L7800C)
- Output current: Up to 1.5 A
Absolute Maximum Ratings:
- Max DC Input Voltage: 35 V (for V O = 5 to 18V), 40 V (for V O = 20, 24V)
- Max continuous current: Internally Limited
- Max junction/storage temperature: 150 °C
Key Specs:
- Output Voltage (L7805, T J = 25°C): 4.8 V min, 5 V typ, 5.2 V max
- Line Regulation (L7805, V I = 7 to 25 V, T J = 25°C): 3 mV typ, 50 mV max
- Load Regulation (L7805, I O = 5 mA to 1.5 A, T J = 25°C): 100 mV max
- Quiescent Current (L7805, T J = 25°C): 6 mA max
- Output Noise Voltage (L7805, B = 10Hz to 100KHz, T J = 25°C): 40 mV/V O max
- Supply Voltage Rejection (L7805, V I = 8 to 18 V, f = 120Hz): 68 dB min
- Dropout Voltage (L7805, I O = 1 A, T J = 25°C): 2 V typ, 2.5 V max
- Short Circuit Current (L7805, V I = 35 V, T J = 25°C): 0.75 A typ, 1.2 A max
Features:
- Thermal overload protection
- Short circuit protection
- Output transition SOA protection
- Internal current limiting
- Thermal shut-down
- Safe area protection
Applications:
- Local on-card regulation
- Adjustable voltage and current applications (with external components)
Package:
- TO-220
- TO-220FP
- TO-3
- D 2 PAK
L7809CP Absolute Maximum Ratings
| Symbol | Parameter² | Parameter² | Value | Unit |
|---|---|---|---|---|
| V I | DC Input Voltage | for V O = 5 to 18V | 35 | V |
| V I | DC Input Voltage | for V O = 20, 24V | 40 | V |
| I O | Output Current | Output Current | Internally Limited | |
| P tot | Power Dissipation | Power Dissipation | Internally Limited | |
| T stg | Storage Temperature Range | Storage Temperature Range | -65 to 150 | °C |
| T op | OperatingJunctionTemperature Range | for L7800 | -55 to 150 | °C |
| T op | OperatingJunctionTemperature Range | for L7800C | 0 to 150 | °C |
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied.
L7809CP Thermal Information
| Symbol | Parameter | D 2 PAK | TO-220 | TO-220FP | TO-3 | Unit |
|---|---|---|---|---|---|---|
| R thj-case | Thermal Resistance Junction-case Max | 3 | 5 | 5 | 4 | °C/W |
| R thj-amb | Thermal Resistance Junction-ambient Max | 62.5 | 50 | 60 | 35 | °C/W |
L7809CP Typical Application
L7809CP Package Information
| DIM. | mm. | mm. | mm. | inch | inch | inch |
|---|---|---|---|---|---|---|
| DIM. | MIN. | TYP | MAX. | MIN. | TYP. | MAX. |
| A | 11.85 | 0.466 | ||||
| B | 0.96 | 1.05 | 1.10 | 0.037 | 0.041 | 0.043 |
| C | 1.70 | 0.066 | ||||
| D | 8.7 | 0.342 | ||||
| E | 20.0 | 0.787 | ||||
| G | 10.9 | 0.429 | ||||
| N | 16.9 | 0.665 | ||||
| P | 26.2 | 1.031 | ||||
| R | 3.88 | 4.09 | 0.152 | 0.161 | ||
| U | 39.5 | 1.555 | ||||
| V | 30.10 | 1.185 |
Variants on the same datasheet
These parts have exact links to the same datasheet. They are candidates to compare, not verified drop-in replacements; check package, pinout and electrical limits.
Other Integrated Circuits
- STM32F103C8T6 – STMicroelectronics, Microcontroller
- STM32F405RGT6 – STMicroelectronics, ARM Cortex-M4 MCU
- SN74AVC4T245PWR – Texas Instruments, Dual-Supply Bus Transceiver Level Translator
- STM32F446RCT6 – STMicroelectronics, ARM Cortex-M4 MCU
- STM32G070RBT6 – STMicroelectronics, Arm Cortex-M0+ 32-bit MCU
- ADS131M08IPBSR – Texas Instruments, Delta-Sigma ADC
- ISO1540DR – Texas Instruments, Bidirectional I²C Isolator
- ISO7740DBQR – Texas Instruments, Digital Isolator
All Integrated Circuits datasheetsAll STMicroelectronics datasheets (808)
Ask your AI agent about the L7809CP
Connect SheetsData to Claude, Cursor, Codex or any MCP client and your agent reads this datasheet for you: pinout, limits, register maps and design checks, with the numbers taken from the PDF.
claude mcp add --transport http sheetsdata https://mcp.sheetsdata.com/mcp
Then ask: "Can the L7809CP run from my 12 V rail? Check it against the datasheet limits."
Create a free account $2 of usage every month, no card needed.