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Product Detailed Parameters
- Description：IC REG LINEAR POS ADJ 1.5A DPAK
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Adjustable
- Number of Regulators：1
- Voltage - Input (Max)：30V
- Voltage - Output (Min/Fixed)：1.25V
- Voltage - Output (Max)：28.5V
- Voltage Dropout (Max)：1.5V @ 1.5A
- Current - Output：1.5A
- Current - Quiescent (Iq)：10 mA
- Current - Supply (Max)：-
- PSRR：88dB (120Hz)
- 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：-
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Overview
The LD1086BDTTR is a positive adjustable linear voltage regulator manufactured by STMicroelectronics, designed for high-current applications. It delivers an output current of up to 1.5A with a maximum dropout voltage of 1.5V at full load. The device supports an input voltage range from 2.85V to 30V and provides an adjustable output voltage between 1.25V and 28.5V. Key electrical specifications include a typical power supply rejection ratio (PSRR) of 88dB at 120Hz and a quiescent current of 10mA. It features internal overcurrent and thermal overload protection and operates within a temperature range of -40°C to +125°C.
Feature Summary
- Provides stable positive regulation with low dropout characteristics suitable for efficient power conversion.
- Integrates comprehensive protection mechanisms including thermal shutdown and current limiting to ensure device safety under fault conditions.
- Utilizes surface-mount DPAK packaging for compact board integration and effective heat dissipation.
Applications
- Battery-powered equipment requiring efficient linear regulation
- Post-regulation stages in switching power supplies
- General-purpose power management in embedded systems
Procurement Notes
Verify the specific suffix 'BDTTR' corresponds to the DPAK package and tape-and-reel quantity when ordering. Confirm that the application circuit includes appropriate input and output capacitors as specified in the official datasheet to maintain stability. Ensure the PCB layout supports the thermal requirements of the TO-252 package for continuous operation at high currents.
Selection Notes
Select this component when a fixed-output LDO is insufficient due to varying voltage requirements. The adjustable output allows customization via external resistors. Consider the 1.5A current capability and 30V input limit against system demands. The DPAK package offers a balance between thermal performance and footprint size compared to smaller SOT packages.
Part Context
This part belongs to the LD1086 family of low-dropout regulators known for pin compatibility with older three-terminal adjustable regulators. The family includes both fixed and adjustable variants in various packages such as TO-220 and DFN8. The LD1086 series is designed to replace PNP-based regulators, offering improved efficiency as quiescent current flows into the load rather than being wasted.
Replacement Considerations
Check for direct pin-compatible alternatives within the same LD1086 family or newer generations from STMicroelectronics. Verify that any substitute maintains the 1.5A current rating and compatible package dimensions for existing PCB footprints.
