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Product Detailed Parameters
- Description：IC REG LINEAR POS ADJ 1A D2PAK
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR)
- Output Configuration：Positive
- Output Type：Adjustable
- Number of Regulators：1
- Voltage - Input (Max)：15V
- Voltage - Output (Min/Fixed)：1.25V
- Voltage - Output (Max)：15V
- Voltage Dropout (Max)：1.3V @ 1A
- Current - Output：1A
- Current - Quiescent (Iq)：5 mA
- Current - Supply (Max)：-
- PSRR：80dB (120Hz)
- Control Features：-
- Protection Features：Over Current, Over Temperature
- Operating Temperature：0°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Supplier Device Package：D2PAK
- Grade：-
- Qualification：-
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Overview
The LD1117AD2MTR is a low-dropout positive voltage regulator manufactured by STMicroelectronics. It provides up to 800 mA of output current and features an adjustable output voltage with a reference voltage (V_REF) of 1.25 V. The device offers tight output voltage tolerance, specified within ±1% at 25 °C and ±2% across the full temperature range. It utilizes an NPN pass transistor for high efficiency and includes internal current and thermal limiting protections. Stability requires only a minimum 10 μF capacitor.
Feature Summary
- Adjustable output voltage configuration with 1.25 V reference
- High efficiency operation via NPN pass transistor architecture
- Integrated internal current and thermal limiting protection mechanisms
Applications
- General purpose linear power supply regulation
- Battery-powered systems requiring efficient voltage step-down
- Embedded circuit biasing and logic level translation
Procurement Notes
Verify the complete part number against official STMicroelectronics documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with required input voltage ranges and load conditions. Cross-reference datasheet revisions to validate electrical characteristics and pinout configurations before integration into design.
Selection Notes
Select this component when an adjustable output voltage is required alongside high current capability. The low dropout characteristic makes it suitable for applications where the input voltage is close to the desired output. Verify that the system can accommodate the minimum output capacitance requirement for stability.
Part Context
This component belongs to the LD1117 family of low-dropout regulators from STMicroelectronics. The family includes fixed voltage variants such as 1.2 V, 1.8 V, 2.5 V, 3.3 V, and 5.0 V, as well as other adjustable versions. The LD1117 series is designed for space-saving surface mount packages like SOT-223 and DPAK, optimizing thermal performance.
Replacement Considerations
The adjustable LD1117 variant is noted as pin-to-pin compatible with other standard adjustable voltage regulators. Specific substitute part numbers are not confirmed in the provided source material.
