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Product Detailed Parameters
- Description：IC REG LINEAR 1.8V 1.5A DPAK
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：6V
- Voltage - Output (Min/Fixed)：1.8V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.4V @ 1.5A
- Current - Output：1.5A
- Current - Quiescent (Iq)：2.5 mA
- Current - Supply (Max)：-
- PSRR：65dB ~ 55dB (120Hz ~ 1kHz)
- Control Features：-
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：TO-252-3, DPAK (2 Leads + Tab), SC-63
- Supplier Device Package：DPAK
- Grade：-
- Qualification：-
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Overview
The LD39150DT18-R is a positive low dropout (LDO) linear voltage regulator manufactured by STMicroelectronics. It provides a fixed output voltage of 1.8 V with a maximum output current capability of 1.5 A. The device is housed in a 3-pin DPAK package (2+Tab) and is supplied in tape and reel format. Key electrical specifications include a maximum input voltage of 30 V, a maximum dropout voltage of 0.7 V at full load, line regulation of 0.5%, and load regulation of 1%. The quiescent current is limited to 40 mA, and the junction-to-ambient thermal resistance is 100°C/W.
Feature Summary
- Provides stable regulated power with a fixed 1.8 V output
- Capable of delivering up to 1.5 A continuous load current
- Operates within a wide input voltage range up to 30 V
- Includes internal protection mechanisms for safe operation
Applications
- Power supply stages for embedded systems requiring 1.8 V rails
- Battery-powered devices needing efficient voltage regulation
- Portable electronics utilizing LDO regulators for noise-sensitive circuits
Procurement Notes
Verify the specific suffix 'R' indicates tape-and-reel packaging when sourcing components. Confirm that the DPAK package variant matches the required PCB footprint and thermal dissipation needs. Ensure the 1.8 V fixed output aligns with the target circuit design before procurement.
Selection Notes
Select this component when a fixed 1.8 V output is required with high current capacity up to 1.5 A. Consider the DPAK package for its balance of thermal performance and space efficiency. Evaluate the 0.7 V dropout voltage against the minimum input voltage requirements of the application to ensure proper regulation under all operating conditions.
Part Context
This part belongs to the LD39150 series of ultra-low-dropout regulators from STMicroelectronics. The series is designed for applications requiring high efficiency and stability. The DT18 variant specifically denotes the 1.8 V fixed output version, while the DPAK package offers robust thermal handling capabilities compared to smaller surface-mount packages.
Replacement Considerations
Check for direct pin-compatible alternatives within the same LD39150 family offering different output voltages or package types. Verify if newer revisions of the regulator provide improved thermal characteristics or lower quiescent currents for enhanced system efficiency.
