L78S18CT STMicroelectronics, L78S18CT Datasheet - Page 31

• Manufacturer Part Number: L78S18CT
• Description: Linear Regulators - Standard 18V 2.0A Positive
• Manufacturer: STMicroelectronics

Specifications of L78S18CT

• Polarity: Positive
• Number Of Outputs: 1
• Output Type: Fixed
• Output Voltage: 18 V
• Output Current: 2 A
• Line Regulation: 360 mV
• Load Regulation: 360 mV
• Input Voltage Max: 35 V
• Maximum Operating Temperature: + 150 C
• Minimum Operating Temperature: 0 C
• Package / Case: TO-3
• Mounting Style: Through Hole
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

L78Sxx, L78SxxC
Figure 37. Protection against input short-circuit with high capacitance loads
1. Application with high capacitance loads and an output voltage greater than 6 volts need an external diode
(see
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 30 on page
28) to protect the device against input short circuit. In this case the input voltage
Doc ID 2148 Rev 4
Typical performance
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