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Product Detailed Parameters
- Description：IC REG LINEAR 5V 800MA TO220
- Series：-
- Mfr：STMicroelectronics
- Package：Tube
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：15V
- Voltage - Output (Min/Fixed)：5V
- 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：Through Hole
- Package / Case：TO-220-3
- Supplier Device Package：TO-220
- Grade：-
- Qualification：-
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Overview
The LD1117V50-DG is a low-dropout linear voltage regulator manufactured by STMicroelectronics, belonging to the LD1117 series. It provides a fixed positive output voltage of 5.0 V with a maximum output current capability of 800 mA. The device operates within an input voltage range up to 15 V and features a typical dropout voltage of 1.2 V at full load. It incorporates internal thermal overload protection and current limiting to ensure safe operation under fault conditions. The component is housed in a surface-mount SO-8 package and maintains high efficiency through its NPN pass transistor architecture.
Feature Summary
- Provides a stable fixed 5.0 V output with ±1% tolerance at 25°C
- Delivers up to 800 mA output current using an efficient NPN pass transistor
- Includes integrated thermal overload and short-circuit current limiting protections
Applications
- General-purpose linear power supply regulation
- Battery-powered equipment requiring stable 5 V rails
- Communication systems and instrumentation power management
Procurement Notes
Verify the specific suffix 'DG' against official STMicroelectronics documentation to confirm the exact package type and RoHS compliance status. Confirm availability as some LD1117 variants have reached end-of-life status. Ensure the selected distributor source matches the manufacturer's original specifications for quality assurance.
Selection Notes
Select this component when a fixed 5 V output is required with moderate current demands up to 800 mA. The SO-8 package is suitable for space-constrained surface-mount designs. Consider the thermal dissipation requirements carefully, as linear regulators dissipate excess energy as heat based on the voltage drop and load current.
Part Context
This part belongs to the LD1117 family of low-dropout regulators known for high efficiency and tight voltage tolerance. The series offers both adjustable and fixed voltage options in various packages including TO-220, DPAK, and SOT-223. The LD1117V50 variant specifically targets applications needing a reliable 5 V supply from higher input voltages.
Replacement Considerations
Direct pin-compatible substitutes may include other 5 V LDOs from different manufacturers, but electrical characteristics such as dropout voltage and quiescent current must be verified. Check for any available newer revisions from STMicroelectronics before selecting third-party alternatives.
