STMicroelectronics

L4931CZ33

L4931CZ33 Description

The L4931CZ33 is a linear voltage regulator IC manufactured by STMicroelectronics, designed to provide a stable 3.3V output with a maximum current of 250mA. This device is part of the Linear & Switching Voltage Regulators category and is packaged in a TO92-3 package. Despite being marked as obsolete, it remains a popular choice for certain applications due to its unique features and performance benefits.

L4931CZ33 Features

• Output Type: Fixed, providing a consistent 3.3V output voltage.
• Voltage - Input (Max): 20V, allowing for a wide range of input voltages.
• Current - Output: 250mA, suitable for low to medium power applications.
• Number of Regulators: 1, a single output regulator.
• Output Configuration: Positive, providing a positive output voltage.
• Current - Supply (Max): 6 mA, low power consumption.
• Product Status: Obsolete, but still available in the market.
• REACH Status: REACH Unaffected, compliant with European chemical regulations.
• RoHS Status: ROHS3 Compliant, adhering to environmental standards.
• Moisture Sensitivity Level (MSL): 1 (Unlimited), suitable for a wide range of environmental conditions.
• Current - Quiescent (Iq): 1 mA, low standby current.
• PSRR: 73dB ~ 55dB (120Hz ~ 10kHz), providing excellent power supply rejection ratio.
• Protection Features: Over Current and Over Temperature, ensuring device safety.
• Mounting Type: Through Hole

L4931CZ33 Applications

The L4931CZ33 is ideal for applications requiring a stable 3.3V output with low to medium current demands. Some specific use cases include:

1. Low-power electronic devices: Due to its low quiescent current, it is suitable for battery-powered applications.
2. Portable electronics: The fixed 3.3V output is commonly used in portable devices like smartphones and tablets.
3. Industrial control systems: The over-current and over-temperature protection features make it suitable for industrial applications where reliability is crucial.
4. Test and measurement equipment: The stable output voltage is essential for accurate measurements in test equipment.

Conclusion of L4931CZ33

While the L4931CZ33 is classified as obsolete, its unique combination of features, such as a fixed 3.3V output, low quiescent current, and robust protection features, make it a reliable choice for certain applications. Its compliance with environmental standards and wide input voltage range further enhance its appeal. Although newer models may offer additional features or improved performance, the L4931CZ33 remains a solid option for applications where its specific characteristics are required.