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Product Detailed Parameters
- Description：IC REG LINEAR 1.8V 500MA PPAK
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- 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：Enable
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：TO-252-5, DPAK (4 Leads + Tab), TO-252AD
- Supplier Device Package：PPAK
- Grade：-
- Qualification：-
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Overview
The LF18ABPT-TR is a low-dropout (LDO) linear voltage regulator manufactured by STMicroelectronics, providing a fixed 1.8 V output with a maximum continuous current of 0.5 A. It operates within an input voltage range of -0.5 V to 40 V and features a typical dropout voltage of 0.45 V. The device incorporates internal overcurrent and thermal protection mechanisms to ensure reliability under fault conditions.
Feature Summary
- Very low dropout voltage enables efficient operation in battery-powered systems
- Low quiescent current supports extended battery life in portable applications
- Integrated thermal and current limiting protects against overload conditions
Applications
- Low noise power supplies for sensitive analog circuits
- Battery-operated consumer electronics requiring high efficiency
- Bulb blinker circuits utilizing low voltage regulation
Procurement Notes
Verify the specific package type and tape-and-reel quantity requirements before ordering. Confirm that the 1.8 V output voltage aligns with the target circuit design specifications. Ensure compatibility with the intended operating temperature range and input voltage constraints provided in the official datasheet.
Selection Notes
Select this component when a stable 1.8 V rail is required from higher or variable input sources. The low dropout characteristic makes it suitable for inputs close to the output voltage. Consider the 0.5 A current limit and thermal dissipation capabilities relative to the expected load profile and ambient conditions.
Part Context
This part belongs to the LFxx series of very low drop regulators from STMicroelectronics. The series offers various fixed output voltages designed for low-noise and low-power applications. The LF18ABPT-TR specifically targets scenarios where minimal voltage loss and low static current are critical performance factors.
Replacement Considerations
Check for other LFxx variants with different fixed output voltages if system requirements change. Verify pinout compatibility and thermal characteristics when substituting with similar LDO regulators from the same manufacturer family.
