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Product Detailed Parameters
- Description：IC REG LIN POS ADJ 800MA TO220
- Series：-
- Mfr：STMicroelectronics
- Package：Tube
- 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：Through Hole
- Package / Case：TO-220-3
- Supplier Device Package：TO-220
- Grade：-
- Qualification：-
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Overview
The LD1117V-DG is a positive adjustable low-dropout linear voltage regulator manufactured by STMicroelectronics. It provides an output current of up to 800 mA with an adjustable output voltage range from 1.25 V to 15 V, utilizing a reference voltage of 1.25 V. The device operates within an input voltage range of 3.3 V to 15 V and features a typical dropout voltage of 1.1 V at full load. It includes internal overcurrent and thermal overload protection mechanisms. The component is housed in a TO-220-3 through-hole package and supports a maximum power dissipation of 12 W. It functions reliably across an operating temperature range of 0°C to +125°C.
Feature Summary
- Adjustable output voltage configuration via external resistors
- Integrated overcurrent and thermal overload protection circuits
- High efficiency NPN pass transistor design
- Requires minimal external capacitance for stability
Applications
- Battery-powered systems requiring efficient linear regulation
- General-purpose power supply architectures
- On-card regulation for distributed power systems
Procurement Notes
Verify the specific suffix 'DG' against the manufacturer's official datasheet to confirm pinout compatibility and package dimensions. Confirm RoHS compliance status as regulatory requirements may vary by production batch. Check for end-of-life notifications or obsolescence notices directly from STMicroelectronics before finalizing procurement plans.
Selection Notes
Select this component when an adjustable positive voltage rail is required with moderate current demands up to 800 mA. Ensure the application maintains an input-to-output differential within the specified dropout limits to maintain regulation. Verify that the thermal management strategy accommodates the 12 W power dissipation capability in the chosen TO-220-3 package configuration.
Part Context
This part belongs to the LD1117 series of low-dropout regulators designed for high-efficiency applications. The series offers both fixed and adjustable versions, distinguishing itself through the use of an NPN pass transistor which directs quiescent current primarily into the load rather than ground. This architecture improves overall system efficiency compared to traditional PNP-based designs.
Replacement Considerations
The LM317T is documented as a direct substitute for the LD1117V-DG. Verify pinout alignment and electrical parameter compatibility before implementation.
