STMicroelectronics

LF33ABV  

Linear & Switching Voltage Regulators

LF33ABV Description

The LF33ABV from STMicroelectronics is a fixed-output linear voltage regulator designed to deliver a stable 3.3V output with a maximum current of 500mA. It operates with an input voltage range up to 16V, making it suitable for a variety of power supply applications. The device features a low dropout voltage of 0.7V at 500mA, ensuring efficient performance even with minimal headroom. With a quiescent current of just 1mA and a maximum supply current of 12mA, the LF33ABV is optimized for power-sensitive designs. Its 80dB to 65dB PSRR (120Hz) ensures excellent noise rejection, critical for sensitive analog and digital circuits.

LF33ABV Features

• Fixed 3.3V Output: Ideal for systems requiring a stable low-voltage supply.
• Low Dropout Voltage: 0.7V at 500mA enables operation with minimal input-output differential.
• High PSRR (80dB ~ 65dB): Superior noise suppression for clean power delivery.
• Robust Protection: Includes over-current and over-temperature safeguards for enhanced reliability.
• Low Quiescent Current (1mA): Minimizes power consumption in standby or idle modes.
• Wide Input Range (Up to 16V): Compatible with various power sources, including unregulated supplies.
• Through-Hole Mounting (TO-220AB): Easy integration into industrial and consumer electronics.
• RoHS3 Compliant & REACH Unaffected: Meets stringent environmental and safety standards.

LF33ABV Applications

The LF33ABV is particularly suited for:

• Embedded Systems: Powering microcontrollers, sensors, and low-voltage logic circuits.
• Consumer Electronics: Voltage regulation in set-top boxes, routers, and audio equipment.
• Industrial Controls: Reliable power management for PLCs, motor drivers, and instrumentation.
• Automotive Electronics: Auxiliary power regulation in infotainment and telematics systems (non-safety-critical).
• Battery-Powered Devices: Efficient voltage conversion in portable gadgets due to low dropout and quiescent current.

Conclusion of LF33ABV

The LF33ABV stands out as a high-performance linear regulator, combining low dropout, excellent PSRR, and robust protection features in a compact TO-220AB package. Its balance of efficiency, reliability, and ease of use makes it a preferred choice for engineers designing power supplies in consumer, industrial, and automotive applications. With STMicroelectronics' reputation for quality, this regulator ensures long-term stability and compliance with global environmental standards.

LF33ABV Documents

Download datasheets and manufacturer documentation for LF33ABV

PCN :

Linear Voltage Regulators - Back Metal Conversion from Cr/Ni/Au to Cr/Ni/Ag for Bipolar Technology in Ang Mo Kio (Singapore) FE plant (PDF)       Product / Process Change Notification (PDF)       Product Change Notification (PDF)       PRODUCT CHANGE NOTIFICATION (PDF)      

Models :

LF33ABV Symbol & Footprint by SnapMagic