ChipApex | Global Electronic Components Supplier
SEARCH
Search Product
Search Post
— IC芯片 | 连接器 | 传感器 | 被动器件 —
Consult the customer manager about the wholesale price.
consultation hotline：86-132-6715-2157
email：[email protected]
Contact the product manager for consultation. One-stop consultation is available.
Do you want a lower wholesale price? Please send us your inquiry and we will reply immediately.
Product Detailed Parameters
- Description：IC REG LINEAR 3.3V 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)：3.3V
- 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：Through Hole
- Package / Case：TO-220-3
- Supplier Device Package：TO-220
- Grade：-
- Qualification：-
Download product information
Overview
The STMicroelectronics LD1117V33 is a positive low-dropout linear voltage regulator providing a fixed 3.3 V output. It supports an output current of up to 950 mA and operates within an input voltage range of 3.3 V to 15 V. The device features a typical dropout voltage of 1 V, with a maximum of 1.1 V. It includes internal thermal overload and short-circuit protection. The unit is housed in a TO-220-3 through-hole package, rated for operation between 0°C and +125°C, with a maximum power dissipation of 12 W.
Feature Summary
- Fixed 3.3 V output with ±1% accuracy at 25°C
- Internal thermal overload and short-circuit protection
- Low dropout voltage capability for efficient regulation
- High efficiency via NPN pass transistor design
Applications
- Battery-powered systems requiring stable voltage rails
- General-purpose linear power supplies
- Post-regulation for switching power supplies
Procurement Notes
Verify the specific suffix and package variant against the official datasheet before procurement. Confirm that the TO-220-3 through-hole configuration matches the target PCB footprint. Ensure the required output current does not exceed the thermal limits defined by the application's ambient temperature and heatsinking conditions.
Selection Notes
Select this component when a fixed 3.3 V rail is needed with moderate current requirements up to 950 mA. It is suitable for applications where low noise and simple implementation are prioritized over high efficiency. Consider thermal management carefully due to the linear regulation method and potential power dissipation in the TO-220 package.
Part Context
The LD1117V33 belongs to the LD1117 family of low-dropout regulators from STMicroelectronics. This series offers both fixed and adjustable versions, designed for high-efficiency performance using an NPN pass transistor. The family is widely used in consumer electronics and industrial equipment for providing stable positive voltage outputs.
Replacement Considerations
Check for pin-compatible alternatives within the same LD1117 series or other LDO families from STMicroelectronics. Verify that any substitute maintains the 3.3 V fixed output, similar current capacity, and compatible package dimensions.
