Texas Instruments UA78L05ACLPE3

  • UA78L05ACLPE3 Texas Instruments Voltage Regulators - Linear, Low Drop Out (LDO) Regulators IC Original Authentic IC Component
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Product attributes Property Value
Manufacturer Texas Instruments
Product Series
Packaging Bulk |
Output Configuration Positive
Output Type Fixed
Number of Regulators 1
Voltage - Input (Max) 20V
Voltage - Output (Min/Fixed) 5V
Voltage - Output (Max) -
Voltage Dropout (Max) 1.7V @ 40mA
Current - Output 100mA
Current - Quiescent (Iq) -
Current - Supply (Max) -
PSRR 49dB (120Hz)
Control Features -
Protection Features Over Current, Over Temperature, Reverse Polarity, Short Circuit
Operating Temperature 0°C ~ 125°C
Grade -
Qualification -
Mounting Type Through Hole
Package / Case TO-226-3, TO-92-3 (TO-226AA)
Supplier Device Package TO-92-3

The Texas Instruments UA78L05A is a fixed 5V linear regulator offering 100mA output current in a TO-92-3 package. With a dropout voltage of 1.7V at 40mA and 49dB PSRR at 120Hz, it delivers clean, stable power for low-current applications. Its through-hole package makes it easy to integrate into PCB designs, and its proven architecture ensures reliable performance in consumer and industrial electronics.

  • Proven Reliability: TI's legacy 78L series design ensures robust operation in harsh environments.
  • Simple Through-Hole Package: TO-92-3 is easy to solder and replace, ideal for prototyping and maintenance.
  • Low Cost: Economical solution for 5V regulation in high-volume consumer products.
  • Stable Output: 49dB PSRR at 120Hz filters common-mode noise from rectified AC supplies.

Microcontroller Power Supply

Provides a stable 5V rail for 8-bit and 16-bit MCUs in embedded systems, with 100mA sufficient for core logic and small peripherals.

Sensor Interface Circuits

Powers op-amps and signal conditioning circuits in temperature or pressure sensors, leveraging 49dB PSRR to reduce noise coupling.

Battery-Powered Portable Devices

Regulates 5V from a 6-9V battery for handheld instruments, with low quiescent current extending battery life.

Reference Voltage Source

Used as a simple 5V reference for comparators and ADC circuits in low-cost designs.

Home Appliance Control Boards

Supplies logic-level power to washing machine or refrigerator control boards, ensuring reliable operation in noisy mains environments.

LED Display Drivers

Provides regulated 5V for LED driver ICs in small alphanumeric displays, maintaining consistent brightness.

Q: What is the output voltage?
A: Fixed 5V output.
Q: What is the maximum output current?
A: 100mA.
Q: What is the input voltage range?
A: Input voltage is 5V (typical); refer to datasheet for absolute maximums.
Q: What is the dropout voltage?
A: 1.7V at 40mA load.
Q: What is the PSRR?
A: 49dB at 120Hz.
Q: What package is available?
A: TO-92-3 (through-hole).
Base Product Number ： UA78L05A
100mA 5V Fixed Output LDO Linear Regulator Texas Instruments Through-Hole TO-92-3
Q: What is the output voltage?
A: Fixed 5V output.
Q: What is the maximum output current?
A: 100mA.
Q: What is the input voltage range?
A: Input voltage is 5V (typical); refer to datasheet for absolute maximums.
Q: What is the dropout voltage?
A: 1.7V at 40mA load.
Q: What is the PSRR?
A: 49dB at 120Hz.
Q: What package is available?
A: TO-92-3 (through-hole).

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