L4931CDT30-TR

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

The L4931CDT30-TR is a positive fixed linear voltage regulator from STMicroelectronics, delivering a nominal 3.0V output with a maximum continuous current of 250mA. It operates within an input voltage range up to 20V and features a typical dropout voltage of 0.4V at full load. The device incorporates internal overcurrent and thermal shutdown protection mechanisms. It requires only a 2.2µF output capacitor for stability and offers a supply voltage rejection ratio of approximately 70dB. The component is housed in a DPAK surface-mount package and supports an operating temperature range from -40°C to +125°C.

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

• Very low dropout voltage capability suitable for battery-powered systems
• Logic-controlled electronic shutdown function for power management
• Internal overcurrent and thermal limit protection circuits

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

• Battery-powered portable electronics
• Low noise power supply regulation
• Local voltage regulation in embedded systems

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

Verify the specific output voltage designation within the part number suffix to ensure it matches the required 3.0V specification. Confirm the package type corresponds to the design footprint requirements. Check for RoHS compliance status if environmental regulations apply to the final assembly. Ensure the ordering quantity aligns with the manufacturer's standard packaging multiples to avoid additional handling fees or availability issues.

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

Select this component when a fixed 3.0V output is required with moderate current demands up to 250mA. Consider the DPAK package for its thermal performance in surface-mount applications. Evaluate the need for the inhibit pin functionality if system standby modes are necessary. Compare against other L4931 variants if different output voltages or packages like SO-8 or TO-92 are preferred for the specific board layout constraints.

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

This part belongs to the L4931 family of very low drop regulators designed for low power and low noise applications. The family includes various output voltage options and package types such as SO-8, DPAK, and TO-92. The 'CDT' suffix indicates a specific tolerance and package combination, while '-TR' denotes tape and reel packaging for automated assembly processes.

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

L4931CDT33-TR

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

What is the minimum output capacitance required for stability?

The L4931CDT30-TR requires a minimum output capacitance of 2.2µF for stability.

Does this regulator include a shutdown feature?

Yes, the L4931 series includes a TTL-compatible shutdown logic control function to reduce power consumption in standby modes.