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Product Detailed Parameters
- Description：IC REG LINEAR 1.8V 1A 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)：0.5V @ 1A
- Current - Output：1A
- Current - Quiescent (Iq)：800 µA
- Current - Supply (Max)：-
- PSRR：60dB ~ 45dB (120Hz ~ 100kHz)
- Control Features：Enable, Power Good
- Protection Features：Over Current, Over Temperature, Under Voltage Lockout (UVLO)
- Operating Temperature：-40°C ~ 125°C (TJ)
- 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 LDF18PT-TR is a fixed-output linear voltage regulator from STMicroelectronics, providing a stable 1.8V output with a maximum current capacity of 1A. It operates within an input voltage range of 2.6V to 16V and features a typical dropout voltage of 200mV at full load. The device supports operation across an extended temperature range from -40°C to +125°C. It utilizes a PPAK surface-mount package for efficient thermal management and compact board integration.
Feature Summary
- Fixed 1.8V output voltage with 1A continuous current capability
- Low dropout performance ensuring efficiency under varying load conditions
- Extended operating temperature range suitable for industrial environments
- Surface-mount packaging designed for automated assembly
Applications
- Portable electronic devices requiring stable low-voltage power rails
- Industrial control systems operating in extreme temperatures
- Embedded logic circuits needing regulated supply voltages
- Battery-powered equipment utilizing linear regulation
Procurement Notes
Verify component authenticity through authorized distributors due to potential counterfeits. Confirm package integrity upon receipt as surface-mount components are sensitive to physical damage. Check manufacturing date codes against project timelines since this part may be subject to termination notices. Ensure storage conditions comply with moisture sensitivity levels specified in the datasheet to prevent soldering defects during assembly.
Selection Notes
Select this regulator when a fixed 1.8V rail is required with high current demand up to 1A. Consider its low dropout characteristic for applications where input voltage closely approaches the output level. Evaluate thermal dissipation requirements based on the PPAK package's heat transfer capabilities. Compare line and load regulation specifications against system stability needs before finalizing the design choice.
Part Context
This component belongs to STMicroelectronics' family of low-dropout linear regulators designed for precision voltage regulation. The LDF series typically integrates protection features such as thermal shutdown and current limiting. The PT suffix indicates the specific surface-mount package type used for this variant. These regulators are engineered for reliability in demanding electronic environments.
Replacement Considerations
Public records indicate product termination for the LDF18PT-TR. Designers should consult official substitution guides for compatible alternatives. Verify that replacement parts match the original electrical specifications including output voltage, current rating, and package dimensions to ensure seamless integration without redesign.
