L4931ABPT50

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

The L4931ABPT50 is a very low dropout linear voltage regulator manufactured by STMicroelectronics, available in the PPAK surface-mount package. It provides a fixed 5V output with a maximum continuous current of 250 mA. The device features a typical dropout voltage of 0.4 V and includes TTL-compatible shutdown logic for power management. It operates within an input voltage range up to 20 V and maintains stability with only a 2.2 µF capacitor. The unit offers high supply voltage rejection of 70 dB (typical) and functions across a temperature range from -40 °C to +125 °C.

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

• Very low dropout voltage capability ensures efficient regulation even when input voltage approaches the output level.
• TTL-compatible shutdown logic allows precise control over standby modes to minimize total system power consumption.
• Requires minimal external capacitance for stability, reducing overall board space and component costs.

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

• Battery-powered portable electronic systems requiring extended operational life
• Low noise analog circuitry powering sensitive signal processing components
• Local voltage regulation on printed circuit boards with standby mode requirements

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

Verify the specific suffix 'PPAK' confirms the intended surface-mount package type for your design. Confirm that the AB selection code meets the required ±1% output voltage accuracy at 25 °C. Ensure the 250 mA current rating aligns with peak load demands. Check for end-of-life status as availability may be limited compared to newer alternatives.

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

Select this component when a compact surface-mount solution with integrated shutdown control is required. The PPAK package suits designs where board real estate is constrained. The AB tolerance variant is appropriate for applications demanding tighter output voltage precision than standard C-grade devices provide.

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

This part belongs to the L4931 family of very low dropout regulators designed for low-power applications. The family includes variants in SO-8, DPAK, TO-92, and PPAK packages. The L4931 series is characterized by its ability to operate with minimal quiescent current and small external capacitors, making it suitable for battery-operated devices.

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

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing thermal and electrical constraints before considering alternative manufacturers or pin-compatible upgrades.