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Product Detailed Parameters
- Description：IC REG LINEAR 3V 800MA DPAK
- Series：-
- Mfr：STMicroelectronics
- Package：Tube
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：15V
- Voltage - Output (Min/Fixed)：3V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：1.2V @ 800mA
- Current - Output：800mA
- Current - Quiescent (Iq)：10 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 LD1117DT30 is a positive linear voltage regulator IC from STMicroelectronics, part of the LD1117 series. It provides a fixed output voltage of 3.0V with a maximum output current of 800mA. The device utilizes a DPAK surface-mount package (TO-252-3). Key electrical specifications include a maximum input voltage of 15V and a typical dropout voltage of approximately 1V at full load. It operates within a temperature range of -40°C to +125°C and features internal thermal overload and short-circuit protection.
Feature Summary
- Fixed 3.0V output voltage for stable power supply applications
- High current capability up to 800mA for driving moderate loads
- Integrated thermal shutdown and current limiting for enhanced reliability
Applications
- Battery-powered systems requiring efficient voltage regulation
- General-purpose power supplies in consumer electronics
- Post-regulation stages for switching power supplies
Procurement Notes
Verify component authenticity through authorized distributors or direct manufacturer channels due to widespread availability. Confirm package integrity upon receipt, as surface-mount devices are sensitive to physical damage. Check manufacturing date codes and lot numbers against quality requirements. Ensure storage conditions comply with moisture sensitivity levels specified in the datasheet to prevent soldering defects during assembly.
Selection Notes
Select this component when a fixed 3.0V output is required with up to 800mA current capacity. Consider the DPAK package for adequate heat dissipation in space-constrained designs. Evaluate input-output voltage differential to ensure dropout voltage remains within acceptable limits under varying load conditions. Compare thermal resistance values if operating near maximum temperature ratings.
Part Context
The LD1117 series represents a family of low-dropout regulators designed for cost-sensitive applications. The DT suffix indicates the DPAK surface-mount package variant. This specific model offers a fixed output, distinguishing it from adjustable versions like the LD1117DTTR. It serves as a common solution for replacing older TO-220 based regulators in modern PCB layouts where space efficiency is prioritized.
Replacement Considerations
Direct pin-compatible substitutes may include other 3.0V LDOs in DPAK packages from different manufacturers, provided electrical parameters such as output current and dropout voltage are comparable. Verify that alternative components meet the same thermal and safety standards. Note that some variants may have different pinouts or packaging dimensions, requiring schematic and layout review before substitution.
