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Product Detailed Parameters
- Description：IC REG LINEAR 1.8V 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)：1.8V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.7V @ 200mA (Typ)
- Current - Output：500mA
- Current - Quiescent (Iq)：1 mA
- Current - Supply (Max)：12 mA
- PSRR：82dB ~ 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 LF18ABV is a very low-dropout linear voltage regulator manufactured by STMicroelectronics, featuring an integrated inhibit function. It provides a fixed 1.8V output with a maximum current capability of 500mA. The device operates with a typical quiescent current of 50 µA in OFF mode and 500 µA in ON mode. It achieves a very low dropout voltage of 0.45V. The component is housed in a TO-220AB package.
Feature Summary
- Integrated inhibit function for power management control
- Very low dropout voltage performance
- Low quiescent current consumption in both active and off states
Applications
- Battery-powered systems requiring efficient voltage regulation
- Portable electronic devices with strict power constraints
- Embedded systems utilizing microcontrollers or sensors
Procurement Notes
Verify the specific package variant and manufacturing date code against official STMicroelectronics documentation before procurement. Ensure compatibility with thermal requirements for the TO-220AB housing. Confirm that the fixed 1.8V output aligns with system design specifications. Cross-reference part numbers to avoid confusion with similar series components lacking the inhibit feature.
Selection Notes
Select this component when a fixed 1.8V rail is required with minimal voltage drop under load. The inhibit pin allows for system-wide power sequencing or shutdown control. Consider the TO-220AB package for applications where through-hole mounting or enhanced heat dissipation is necessary compared to smaller surface-mount options.
Part Context
This regulator belongs to the LFXX series of very low-dropout voltage regulators from STMicroelectronics. The series is designed for applications demanding high efficiency and low noise. The LF18ABV specifically denotes the 1.8V output version in the TO-220AB package, distinguishing it from other voltage variants and packaging styles within the same functional family.
Replacement Considerations
Consult official substitution guides for compatible LDOs with similar current ratings and inhibit features. Verify pinout compatibility and thermal characteristics when replacing with alternative manufacturers' parts.
