仕様
| 属性 | 値 |
| Package | Tube |
| ProductStatus | Active |
| OutputConfiguration | Positive |
| OutputType | Fixed |
| NumberofRegulators | 1 |
| Voltage-Input(Max) | 35V |
| Voltage-Output(Min/Fixed) | 12V |
| VoltageDropout(Max) | 2V @ 1A (Typ) |
| Current-Output | 1.5A |
| Current-Quiescent(Iq) | 6 mA |
| PSRR | 60dB (120Hz) |
| ProtectionFeatures | Over Temperature, Short Circuit |
| OperatingTemperature | -40°C ~ 125°C |
| MountingType | Through Hole |
| Package/Case | TO-220-3 |
概要
Description
L7812ABV-DG is a fixed 12 V positive voltage regulator from STMicroelectronics (L78xx family). It takes a higher input voltage and delivers a regulated 12 V output, suitable for powering digital/mixed-signal circuits.
Key specs (typical):
- Output: 12 V, up to about 1.5 A with adequate heat sinking
- Input max: ~35 V; dropout ≈ 2 V (varies with current/temperature)
- Protection: thermal shutdown and current/short-circuit protection
- Stability: requires external capacitors (typical: 0.33 μF input, 0.1 μF output)
- Pinout (front face toward you, left-to-right): Input, Ground, Output
DG suffix indicates a specific ST package variant; check the datasheet for exact mechanical dimensions and RoHS status. Commonly used in power rails for microcontrollers, embedded boards, and regulated supply designs.
Key specs (typical):
- Output: 12 V, up to about 1.5 A with adequate heat sinking
- Input max: ~35 V; dropout ≈ 2 V (varies with current/temperature)
- Protection: thermal shutdown and current/short-circuit protection
- Stability: requires external capacitors (typical: 0.33 μF input, 0.1 μF output)
- Pinout (front face toward you, left-to-right): Input, Ground, Output
DG suffix indicates a specific ST package variant; check the datasheet for exact mechanical dimensions and RoHS status. Commonly used in power rails for microcontrollers, embedded boards, and regulated supply designs.
Equivalent
Equivalents (12 V fixed, 3-terminal regulators) include:
- LM7812 / LM7812CV (National Semiconductor / TI)
- MC7812 / MC7812CV (ON Semiconductor)
- KA7812 (Renesas/Fairchild lineage)
- NTE7812 (NTE cross-reference)
Note: pinouts/packaging and thermal specs vary; check datasheets. Automotive variants exist (like L7812ABV) for wider temp ranges.
- LM7812 / LM7812CV (National Semiconductor / TI)
- MC7812 / MC7812CV (ON Semiconductor)
- KA7812 (Renesas/Fairchild lineage)
- NTE7812 (NTE cross-reference)
Note: pinouts/packaging and thermal specs vary; check datasheets. Automotive variants exist (like L7812ABV) for wider temp ranges.
Features
L7812ABV-DG features (concise):
- Fixed +12 V output
- Max output current ~1.5 A
- Input voltage range up to 35 V
- Dropout voltage ≈ 2 V at full load
- Internal current limit
- Thermal shutdown protection
- Safe-area protection
- Short-circuit tolerant
- Requires stability capacitors (typ. 0.33 µF input, 0.1 µF output)
- Package: DG (TO-220 style) with tab typically connected to the output
Note: Values are typical; refer to the datasheet for exact specs.
- Fixed +12 V output
- Max output current ~1.5 A
- Input voltage range up to 35 V
- Dropout voltage ≈ 2 V at full load
- Internal current limit
- Thermal shutdown protection
- Safe-area protection
- Short-circuit tolerant
- Requires stability capacitors (typ. 0.33 µF input, 0.1 µF output)
- Package: DG (TO-220 style) with tab typically connected to the output
Note: Values are typical; refer to the datasheet for exact specs.
Pinout
- Pin count: 3 pins
- Function: Fixed positive 12 V linear regulator (three-terminal)
- Typical pinout (front view): Pin 1 = Input, Pin 2 = Ground, Pin 3 = Output
- Notes: Regulates Vin to +12 V DC; up to about 1.5 A with proper heat sinking; input range up to roughly 35 V (dropout ~2 V).
- Function: Fixed positive 12 V linear regulator (three-terminal)
- Typical pinout (front view): Pin 1 = Input, Pin 2 = Ground, Pin 3 = Output
- Notes: Regulates Vin to +12 V DC; up to about 1.5 A with proper heat sinking; input range up to roughly 35 V (dropout ~2 V).
Manufacturer
- Manufacturer: STMicroelectronics (STMicro).
- What kind of company: A multinational semiconductor company that designs, develops, manufactures, and markets a broad range of electronics components and integrated circuits.
- What kind of company: A multinational semiconductor company that designs, develops, manufactures, and markets a broad range of electronics components and integrated circuits.
Application
L7812ABV-DG is a fixed +12 V linear regulator (STMicroelectronics). Typical applications:
- Provide a stable 12 V rail in DC power supplies and embedded systems.
- Power microcontrollers, logic ICs, op-amps, and sensors requiring 12 V.
- Post-regulator stage in moderate-current power supplies.
- Used in consumer electronics, automotive, and industrial equipment needing a simple +12 V source.
Notes: operates from inputs up to ~35 V, dropout ~2 V; requires heatsinking for higher currents; includes current limit and thermal shutdown protection.
- Provide a stable 12 V rail in DC power supplies and embedded systems.
- Power microcontrollers, logic ICs, op-amps, and sensors requiring 12 V.
- Post-regulator stage in moderate-current power supplies.
- Used in consumer electronics, automotive, and industrial equipment needing a simple +12 V source.
Notes: operates from inputs up to ~35 V, dropout ~2 V; requires heatsinking for higher currents; includes current limit and thermal shutdown protection.
Package
TO-220AB (through-hole) package. The L7812ABV-DG is ST’s 12V regulator in the TO-220AB package with three pins and a metal tab.
