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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：-
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Overview
The LF33CV is a fixed-output linear voltage regulator from the LFxx series, manufactured by STMicroelectronics. It provides a stable 3.3 V output with a maximum continuous current of 0.5 A. The device operates within an input voltage range of -0.5 V to 40 V and features a typical low dropout voltage of 0.45 V. It includes an integrated on-off switch for power control. The component is housed in a 3-pin TO-220 package designed for through-hole mounting, with a maximum operating temperature of 125 °C and a quiescent current of 500 μA.
Feature Summary
- Integrated on-off switch for precise power management
- Low dropout voltage operation suitable for battery-powered systems
- Low quiescent current design for energy efficiency
Applications
- Battery-powered electronic systems
- Low-noise power supply circuits
- Low-power application environments
Procurement Notes
Verify the specific ordering suffix against official documentation to confirm pinout and thermal characteristics. Ensure the selected package variant matches the required PCB footprint and mounting style. Cross-reference the manufacturer's latest datasheet to validate electrical parameters and environmental ratings before finalizing procurement specifications.
Selection Notes
Select this component when a fixed 3.3 V rail is required with moderate current capacity. The through-hole TO-220 package facilitates easy integration into legacy designs or applications requiring robust thermal dissipation without complex surface-mount reflow processes. Consider the input voltage range to ensure compatibility with the source power supply.
Part Context
This part belongs to the LFxx family of very low drop regulators produced by STMicroelectronics. The series offers various fixed output voltages tailored for low-power and low-noise requirements. The LF33CV specifically targets applications needing reliable regulation with minimal heat generation under light load conditions.
Replacement Considerations
Consult official substitution lists for compatible parts within the same regulatory family. Verify that alternative components match the 3.3 V output, 0.5 A current rating, and TO-220 package dimensions to ensure mechanical and electrical interchangeability.
