L7812T STMicroelectronics, L7812T Datasheet - Page 36

• Manufacturer Part Number: L7812T
• Description: IC REG POS 1.5A 12V PREC TO-3
• Manufacturer: STMicroelectronics

Specifications of L7812T

• Regulator Topology: Positive Fixed
• Voltage - Output: 12V
• Voltage - Input: Up to 35V
• Voltage - Dropout (typical): 2V @ 1A
• Number Of Regulators: 1
• Current - Output: 1.5A
• Operating Temperature: -55°C ~ 150°C
• Mounting Type: Through Hole
• Package / Case: TO-204, TO-3
• Polarity: Positive
• Number Of Outputs: 1
• Output Type: Fixed
• Output Voltage: 12 V
• Output Current: 1.5 A
• Line Regulation: 120 mV
• Load Regulation: 100 mV
• Dropout Voltage (max): 2.5 V
• Input Voltage Max: 35 V
• Maximum Operating Temperature: + 150 C
• Minimum Operating Temperature: - 55 C
• Mounting Style: Through Hole
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Limit (min): -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Application information
Figure 28. Protection against input short-circuit with high capacitance loads
Note:
36/56
Application with high capacitance loads and an output voltage greater than 6 volts need an
external diode (see
this case the input voltage falls rapidly while the output voltage decrease slowly. The
capacitance discharges by means of the base-emitter junction of the series pass transistor
in the regulator. If the energy is sufficiently high, the transistor may be destroyed. The
external diode by-passes the current from the IC to ground.
Figure 23 on page
Doc ID 2143 Rev 23
34) to protect the device against input short circuit. In
L78xx, L78xxC, L78xxAB, L78xxAC