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Product Detailed Parameters
- Description：IC REG LINEAR 5V 500MA TO220
- Series：-
- Mfr：STMicroelectronics
- Package：Tube
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：16V
- Voltage - Output (Min/Fixed)：5V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.7V @ 500mA
- Current - Output：500mA
- Current - Quiescent (Iq)：1 mA
- Current - Supply (Max)：12 mA
- PSRR：76dB ~ 60dB (120Hz ~ 10kHz)
- Control Features：-
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Through Hole
- Package / Case：TO-220-3
- Supplier Device Package：TO-220
- Grade：-
- Qualification：-
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Overview
The LF50ABV-DG is a fixed-output low-dropout (LDO) linear voltage regulator manufactured by STMicroelectronics. It provides a stable 5 V output with a maximum load current of 500 mA. The device features a typical dropout voltage of 0.45 V at full load and a low quiescent current of 50 µA, making it suitable for power-sensitive applications. It operates within an input voltage range of -0.5 V to 40 V and supports junction temperatures from -40 °C to +125 °C. The component is housed in a TO-220AB package with three terminals.
Feature Summary
- Fixed 5 V output voltage with 500 mA continuous current capability
- Low dropout voltage of 0.45 V ensures efficient regulation under minimal headroom
- Low quiescent current of 50 µA optimizes performance in battery-powered systems
- Integrated thermal protection safeguards against overheating during operation
Applications
- Battery-powered portable electronic devices requiring low noise and low power consumption
- General-purpose DC-to-DC conversion in embedded systems
- Power supply stages for microcontrollers and logic circuits needing stable 5 V rails
Procurement Notes
Verify the complete part number including suffixes such as DG, which may indicate specific packaging or tape-and-reel configurations distinct from tube packaging. Confirm RoHS compliance status and ensure the supplier provides official datasheets matching the exact suffix. Cross-reference ordering codes with manufacturer documentation to avoid discrepancies in pinout or thermal characteristics.
Selection Notes
Select this regulator when a fixed 5 V output is required with moderate current demands up to 500 mA. The low dropout characteristic makes it ideal for inputs close to the output voltage. Ensure adequate heat sinking is planned due to the TO-220 package's thermal resistance. Verify that the application does not require adjustable output or higher current capabilities beyond the specified limit.
Part Context
The LF50 series comprises low-dropout regulators available in various fixed output voltages. The LF50ABV-DG specifically denotes the 5 V variant in a TO-220AB package with DG suffix indicating specific manufacturing or packaging details. This series is designed for general-purpose linear regulation where simplicity and reliability are prioritized over high efficiency compared to switching regulators.
Replacement Considerations
Direct substitutes include other 5 V LDOs in TO-220 packages from STMicroelectronics or compatible manufacturers like LM7805 variants, though dropout and quiescent current specs may differ. Verify pin compatibility and thermal performance before substitution.
FAQ
What is the maximum input voltage for the LF50ABV-DG?
The maximum input voltage is 40 V.
Does the LF50ABV-DG include short-circuit protection?
Yes, the device includes internal thermal overload and short-circuit protection mechanisms.
