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Product Detailed Parameters
- Description：IC REG LINEAR POS ADJ 800MA DPAK
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- 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)：1.2V @ 800mA
- Current - Output：800mA
- Current - Quiescent (Iq)：5 mA
- Current - Supply (Max)：-
- PSRR：75dB (120Hz)
- Control Features：-
- Protection Features：Over Current, Over Temperature
- Operating Temperature：0°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 LD1117DTTR is a positive low-dropout linear voltage regulator manufactured by STMicroelectronics. It provides an adjustable output voltage ranging from 1.25V to 15V with a maximum continuous output current of 1.3A. The device features a DPAK surface-mount package (TO-252) with three pins, including a thermal tab for heat dissipation. Key electrical specifications include a reference voltage of 1.262V, line regulation of 0.2%, and load regulation of 0.4%. Maximum power dissipation is rated at 12000mW.
Feature Summary
- Adjustable output voltage capability spanning 1.25V to 15V
- High current delivery up to 1.3A with low dropout characteristics
- Integrated thermal protection and overcurrent limiting
Applications
- Battery-powered systems requiring efficient voltage regulation
- Post-regulation stages for switching power supplies
- Local on-card regulation for distributed power architectures
Procurement Notes
Verify the specific suffix 'DTTR' corresponds to the tape-and-reel packaging format and DPAK footprint when sourcing. Confirm RoHS compliance status and SVHC declarations against current regulatory requirements. Ensure the supplier provides official datasheets matching the STMicroelectronics part number to avoid counterfeit components. Check for any recent lifecycle changes or obsolescence notices directly from the manufacturer.
Selection Notes
Select this component when an adjustable positive LDO with high current capacity is required in a surface-mount application. The DPAK package offers a balance between thermal performance and board space efficiency compared to smaller SOT packages. Consider the maximum input voltage limit of 15V and the thermal resistance of the PCB layout when designing for full 1.3A loads.
Part Context
This part belongs to the LD1117 family of low-dropout regulators known for their simplicity and robustness. The DTTR variant specifically denotes the DPAK surface-mount package with tape-and-reel shipping. It serves as a versatile solution for general-purpose power management tasks where precise voltage adjustment is needed within the specified input and output constraints.
Replacement Considerations
LD1117DT28TR is listed as a similar alternative, though it provides a fixed 2.85V output rather than adjustable voltage. Verify pin compatibility and thermal requirements before substitution.
