L4931CV120

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The L4931CV120 is a positive fixed linear voltage regulator manufactured by STMicroelectronics, designed for applications requiring stable power delivery. It provides a fixed output voltage of 12V with a maximum continuous output current of 250mA. The device operates within an input voltage range up to 20V and features a typical dropout voltage of 0.8V at full load. Key electrical specifications include a quiescent current of 1.6mA and a supply voltage rejection ratio (PSRR) ranging from 64dB at 120Hz to 55dB at 120kHz. It incorporates internal protection mechanisms against overcurrent and thermal overload, ensuring reliable operation across a wide temperature range from -40°C to +125°C.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Provides a fixed 12V output with 250mA current capability in a TO-220 package
• Includes internal thermal overload and short-circuit current limiting protection
• Operates with low quiescent current suitable for battery-powered systems

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Battery-powered electronic systems requiring efficient voltage regulation
• Low noise power supply circuits for sensitive analog components
• General-purpose linear regulation in industrial control modules

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify component authenticity through authorized STMicroelectronics distributors or certified partners. Confirm the specific suffix 'CV120' matches the required 12V fixed output specification. Check RoHS compliance status and ensure the TO-220-3 package aligns with thermal management requirements. Review datasheet revisions for any updates to electrical characteristics or recommended operating conditions before finalizing procurement.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component when a fixed 12V output is required with moderate current demands up to 250mA. Consider the TO-220 package for through-hole mounting and adequate heat dissipation without external heatsinks under typical loads. Evaluate the 0.8V dropout voltage against the minimum input voltage available in the system. Ensure the operating temperature range covers the environmental extremes of the intended application.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

The L4931 series comprises very low drop voltage regulators available in multiple packages including SO-8, DPAK, and TO-92. These regulators are characterized by low quiescent current and low dropout voltage, making them suitable for portable and battery-operated devices. The CV120 variant specifically denotes the fixed 12V output version housed in a TO-220 package, offering robust performance for higher power linear regulation tasks compared to smaller surface-mount variants.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

Direct pin-compatible replacements may include other L4931 variants with different output voltages if the voltage requirement changes, such as L4931CD33 for 3.3V output. However, package differences between TO-220 and SO-8 require PCB layout modifications. Verify that substitute components maintain similar thermal and current handling capabilities.