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Product Detailed Parameters
- Description：IC REG LINEAR 1.8V 500MA DPAK
- 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：-
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：TO-252-3, DPAK (2 Leads + Tab), SC-63
- Supplier Device Package：DPAK
- Grade：-
- Qualification：-
Download product information
Overview
The LF18ABDT-TR is a fixed-output low-dropout linear voltage regulator manufactured by STMicroelectronics. It provides a stable 1.8 V output with a maximum continuous current capability of 500 mA. The device operates within an input voltage range of -0.5 V to 40 V and features a typical dropout voltage of 0.45 V. Designed for surface-mount applications, it utilizes the TO-252-3 (DPAK) package. The component supports an operating temperature range from -40 °C to +125 °C and maintains a low quiescent current of 1 mA.
Feature Summary
- Provides a fixed 1.8 V regulated output suitable for low-voltage digital logic and analog circuits
- Features very low dropout voltage characteristics to maximize efficiency in battery-powered systems
- Incorporates internal protection mechanisms including thermal shutdown and short-circuit limiting
Applications
- Battery-powered portable electronic devices requiring efficient power management
- Low-noise and low-power consumer electronics applications
- General-purpose DC-to-DC regulation in industrial control modules
Procurement Notes
Verify the specific suffix 'ABDT' against official STMicroelectronics documentation to confirm pinout configuration and package variant. Ensure the ordering part number matches the required tape-and-reel quantity specified in the manufacturer's datasheet. Cross-reference the date code and lot traceability requirements with your supply chain standards before finalizing procurement orders.
Selection Notes
Select this component when a fixed 1.8 V rail is required with moderate current demands up to 500 mA. The low quiescent current makes it preferable over standard regulators for energy-sensitive designs. Verify that the input voltage remains within the specified 40 V absolute maximum rating while ensuring sufficient headroom above the 0.45 V typical dropout voltage for proper regulation under load conditions.
Part Context
This part belongs to the LFxx series of low-dropout regulators from STMicroelectronics. The series offers various fixed output voltages optimized for low-noise performance. The LF18ABDT-TR specifically addresses applications needing a compact surface-mount solution with high reliability and integrated safety features for modern embedded systems.
Replacement Considerations
Consult official STMicroelectronics substitution guides for compatible alternatives within the LFxx family or equivalent LDOs from other manufacturers. Verify pin compatibility and thermal performance before swapping components.
