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L7812CV

12V 1.5A positive LDO, TO-220

6541

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Pieza del fabricante：

L7812CV

Paquete：

TO-220-3

Marca：
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Descripción

Productos

The L7812CV from ST is a 12V fixed 1.5A positive voltage regulator with internal current limiting, thermal shutdown, and 2V typical dropout in TO-220 for linear power supply regulation.

Especificaciones

Salida 12V fixed
Corriente de salida 1.5A
Input Range 14.5-35V
Dropout 2V typ
Regulation +/-2%
Temp -40~125C

Características

  • 12V fixed output
  • 1.5A output current
  • Internal current limiting
  • Thermal shutdown
  • Output transistor safe area protection

Aplicaciones

  • Linear power supplies
  • Board-level regulation
  • Industrial control
  • Audio amplifiers
  • Battery chargers

The L7812CV from ST is a 12V fixed 1.5A positive voltage regulator with internal current limiting, thermal shutdown, and 2V typical dropout in TO-220 for linear power supply regulation.

The L7812CV is a 12V fixed positive voltage regulator from ST in TO-220, delivering up to 1.5A output current. It uses a series-pass NPN transistor controlled by a feedback loop: an internal bandgap reference (approximately 7V) is compared against a divided-down version of the output voltage. The error amplifier drives the series-pass transistor to maintain VOUT at 12V +/-2% (for the AB version). The dropout voltage is approximately 2V at 1A, requiring VIN >= 14.5V for proper regulation. Internal protection includes: thermal shutdown at 150C junction temperature, output short-circuit current limiting (typically 2.1A peak), and safe operating area (SOA) protection that limits current when VIN-VOUT differential is large. The device requires external capacitors: 0.33uF on input for stability and 0.1uF on output for transient response. Quiescent current is 5mA typical, which flows regardless of load.

Pin Nombre Tipo Función
1 EN Entrada Unregulated input voltage (14.5-27V)
2 GND Potencia Ground (common, tab)
3 OUT Salida Regulated 12V output (up to 1.5A)
  • Linear power supplies
  • Board-level regulation
  • Industrial control
  • Audio amplifiers
  • Battery chargers
    • Fabricante Número de pieza Paquete Notas
    STMicroelectronics L7812ABV TO-220 Higher precision (2% tolerance)
    Texas Instruments UA7812CKTTR D2PAK SMD equivalent, 1A
    onsemi MC7812ECTG TO-220 Direct equivalent from onsemi
    Infineon TLE4274G TO-252 Automotive 12V LDO, SMD
    Microchip MCP1827-1202E/AB SOT-223 1.5A LDO, low dropout alternative
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