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Product Detailed Parameters
- Description：IC REG LINEAR 1.8V 1.5A TO220
- Series：-
- Mfr：STMicroelectronics
- Package：Tube
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：30V
- Voltage - Output (Min/Fixed)：1.8V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：1.5V @ 1.5A
- Current - Output：1.5A
- Current - Quiescent (Iq)：10 mA
- Current - Supply (Max)：-
- PSRR：82dB (120Hz)
- 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 LD1086V18-DG is a fixed-output low-dropout positive voltage regulator manufactured by STMicroelectronics. It provides a stable 1.8 V output with a maximum current capacity of 1.5 A. The device utilizes a TO-220-3 through-hole package and operates within an input voltage range of 3.4 V to 30 V. Key electrical specifications include a typical dropout voltage of 1.3 V at full load, a line regulation of 200 uV, and a load regulation of 500 uV. The quiescent current is specified at 5 mA, and the unit maintains an operating temperature range from -40 °C to +125 °C.
Feature Summary
- Fixed 1.8 V output voltage with high precision tolerance
- Capable of delivering up to 1.5 A continuous output current
- Low dropout characteristic ensures efficient operation under varying loads
- Integrated thermal protection and internal power limiting for reliability
Applications
- General-purpose linear power supply circuits requiring 1.8 V rails
- Battery-powered systems needing efficient voltage step-down
- Embedded electronics utilizing standard TO-220 mounting infrastructure
Procurement Notes
Verify the specific suffix 'DG' against the manufacturer's latest datasheet to confirm pinout and package dimensions, as suffixes can indicate variations in tape-and-reel versus tube packaging or RoHS compliance status. Ensure the procurement channel sources genuine components to avoid counterfeit regulators that may fail thermal or electrical stress tests.
Selection Notes
Select this component when a fixed 1.8 V rail is required with high current capability in a through-hole format. It serves as a direct replacement for older adjustable regulators due to pin compatibility, offering superior dropout performance. Consider the thermal dissipation requirements of the TO-220 package when designing for maximum load conditions.
Part Context
This part belongs to the LD1086 family of low-dropout positive voltage regulators. The series offers both adjustable and fixed output options in various packages including TO-220, D²PAK, and DFN8. The LD1086V18-DG specifically addresses applications requiring a fixed 1.8 V output with robust current handling in a traditional through-hole enclosure.
Replacement Considerations
The LD1086 series is pin-compatible with standard three-terminal adjustable regulators. Verify if alternative fixed-voltage LDOs from other manufacturers meet the 1.5 A current and 1.8 V output requirements while maintaining similar dropout characteristics.
