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Product attributes Property Value
Manufacturer STMicroelectronics
Product Series
Packaging Cut Tape (CT) | Tape & Reel (TR)
Output Configuration Positive
Output Type Fixed
Number of Regulators 1
Voltage - Input (Max) 30V
Voltage - Output (Min/Fixed) 5V
Voltage - Output (Max) -
Voltage Dropout (Max) -
Current - Output 100mA
Current - Quiescent (Iq) 5.5 mA
Current - Supply (Max) 6 mA
PSRR 49dB (120Hz)
Control Features -
Protection Features Over Current, Over Temperature, Short Circuit
Operating Temperature -40°C ~ 125°C
Grade -
Qualification -
Mounting Type Surface Mount
Package / Case TO-243AA
Supplier Device Package SOT-89-3
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The L78L05ABUTR from STMicroelectronics is a classic 5.0V fixed-output LDO regulator, delivering up to 100mA. It accepts a wide input voltage range up to 30V, making it versatile for various power supply designs. With a quiescent current of 5.5mA and 49dB PSRR at 120Hz, it provides stable, reliable power for industrial and consumer electronics. The SOT-89-3 package offers good thermal performance.

  • Wide Input Flexibility: Accepts up to 30V input, suitable for multi-rail systems.
  • Proven Reliability: Industry-standard L78L series with decades of field use.
  • Thermal Efficiency: SOT-89-3 package dissipates heat effectively.
  • Simple Design: Requires minimal external components.

AC/DC Power Supplies

Wide input range (up to 30V) makes it ideal for post-regulation in mains-powered adapters.

Industrial Logic Circuits

Stable 5V rail for TTL and CMOS logic in industrial controllers.

Home Appliances

Reliable power for microcontrollers in washing machines, microwaves, and refrigerators.

Test & Measurement Equipment

Provides clean 5V reference for bench multimeters and oscilloscopes.

Automotive Aftermarket

Handles 12V vehicle battery input, delivering regulated 5V for dashcams and sensors.

LED Display Drivers

Powers logic sections of LED matrix drivers in signage applications.

Q: What is the output voltage of the L78L05ABUTR?
A: The fixed output voltage is 5.0V.
Q: What is the maximum output current?
A: It can deliver up to 100mA.
Q: What is the input voltage range?
A: The input voltage range is 7V to 30V (absolute maximum).
Q: What is the dropout voltage?
A: The dropout voltage is typically 2V (not specified in the provided data).
Q: What is the quiescent current?
A: The quiescent current is 5.5mA.
Q: What package is available?
A: It comes in a SOT-89-3 package.
Base Product Number : L78L05ABU
100mA 5.0V Industrial LDO Linear Regulator SOT-89-3 STMicroelectronics Wide Input
Q: What is the output voltage of the L78L05ABUTR?
A: The fixed output voltage is 5.0V.
Q: What is the maximum output current?
A: It can deliver up to 100mA.
Q: What is the input voltage range?
A: The input voltage range is 7V to 30V (absolute maximum).
Q: What is the dropout voltage?
A: The dropout voltage is typically 2V (not specified in the provided data).
Q: What is the quiescent current?
A: The quiescent current is 5.5mA.
Q: What package is available?
A: It comes in a SOT-89-3 package.