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 500MA TO220
- Series：-
- Mfr：STMicroelectronics
- Package：Tube
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：16V
- Voltage - Output (Min/Fixed)：3.3V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.7V @ 500mA
- Current - Output：500mA
- Current - Quiescent (Iq)：1 mA
- Current - Supply (Max)：12 mA
- PSRR：80dB ~ 65dB (120Hz ~ 65dB)
- Control Features：-
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Through Hole
- Package / Case：TO-220-3
- Supplier Device Package：TO-220
- Grade：-
- Qualification：-
Download product information
Overview
The LF33CV-DG is a fixed linear voltage regulator from STMicroelectronics, providing a stable 3.3V output with a maximum load current of 500mA. It operates within an input voltage range of 3V to 16V and features a typical dropout voltage of 0.45V at full load. The device utilizes a TO-220-3 through-hole package, ensuring robust thermal performance for power dissipation. It supports an operating temperature range from -40°C to +125°C, making it suitable for industrial applications requiring reliable regulation in varying environmental conditions.
Feature Summary
- Fixed 3.3V output voltage with high accuracy
- Low dropout voltage capability for efficient power usage
- Integrated thermal overload and short-circuit protection
- Through-hole TO-220-3 package for easy mounting
Applications
- Battery-powered equipment requiring low quiescent current
- Post-regulation for switching power supplies
- Linear regulators in noise-sensitive analog circuits
Procurement Notes
Verify the exact suffix 'DG' against official STMicroelectronics documentation to confirm RoHS compliance and specific tape-and-reel or tube packaging details. Ensure the ordering part number matches the required package variant and lead-free status as defined in the latest datasheet revision. Cross-reference with authorized distributors to confirm availability and authenticity.
Selection Notes
Select this component when a fixed 3.3V rail is needed with moderate current capacity up to 500mA. Consider the TO-220-3 package for superior heat dissipation compared to smaller surface-mount alternatives. Evaluate the input-output voltage differential to ensure the dropout voltage remains within acceptable limits for the specific application's efficiency requirements.
Part Context
This part belongs to the LFxx series of low-dropout linear regulators from STMicroelectronics. These devices are designed for general-purpose voltage regulation tasks where simplicity and reliability are prioritized over high-frequency switching efficiency. The series offers various fixed output voltages to accommodate common logic levels and sensor requirements in embedded systems.
Replacement Considerations
Direct pin-compatible substitutes include other 3.3V LDOs in TO-220 packages such as the LM317 configured for fixed output or equivalent parts from Texas Instruments like the LP2950 if current requirements differ. Verify thermal resistance and pinout compatibility before substitution.
