L7812CT STMicroelectronics, L7812CT Datasheet - Page 36

• Manufacturer Part Number: L7812CT
• Description: IC REGULATOR POS 12V TO-3
• Manufacturer: STMicroelectronics
• Type: Voltage Regulatorr

Specifications of L7812CT

• 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: 0°C ~ 125°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: 240 mV
• Load Regulation: 240 mV
• Dropout Voltage (max): 2 V
• Input Voltage Max: 35 V
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: 0 C
• Mounting Style: Through Hole
• Current, Output: 1.5 A
• Current, Supply: 8 mA
• Package Type: TO-3
• Regulation, Line: 240 mV
• Regulation, Load: 120 mV
• Regulator Type: Positive Voltage Out
• Resistance, Thermal, Junction To Case: 4 °C/W
• Temperature, Operating, Range: 0 to +150 °C
• Voltage, Dropout: 2 V
• Voltage, Input: 19 V
• Voltage, Noise: 75 μV/V
• Voltage, Output: 12 V
• Voltage, Supply, Rejection Ratio: 55 dB
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Limit (min): -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-1006

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