AP7381-50SA-7

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

The AP7381-50SA-7 is a positive voltage regulator IC from the AP7381 series, manufactured by Diodes Incorporated. It provides a fixed output voltage of 5V with a maximum output current of 150mA. The device supports a wide input voltage range from 3.3V to 40V and operates within a junction temperature range of -40°C to +125°C. Key electrical characteristics include a typical dropout voltage of 1000mV at 100mA, line regulation of 0.05%/V, load regulation of 0.5%, and power supply rejection ratio (PSRR) of 60dB. It is housed in an SOT-23 package.

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

• Ultra-low quiescent current for extended battery life
• High accuracy output voltage regulation
• Integrated thermal shutdown and short-circuit protection
• Compatible with low ESR ceramic capacitors

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

• E-meters
• Battery-powered equipments
• Laptops, palmtops, notebook computers
• Portable information appliances

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

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm datasheet revision DS39917 Rev. 5-2 matches procurement specifications. Ensure packaging details align with requirements, as this specific part number utilizes a 7-inch tape and reel carrier. Cross-reference ordering codes to confirm the SOT-23 package and 5V output variant.

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

Select this component when a fixed 5V output is required with high input voltage tolerance up to 40V. The SOT-23 package suits space-constrained surface-mount designs. Verify that the 150mA current capability meets load demands and that the 1000mV dropout voltage accommodates the minimum input-output differential under expected operating conditions.

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

This part belongs to the AP7381 series of wide input voltage ULDO regulators. Other variants in the series offer different fixed output voltages such as 2.8V, 3.3V, and 7V. Alternative packages include SOT-89 and TO-92, though the TO-92 version is not recommended for new designs. The series is designed for USB and portable device applications requiring low ground current.

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

Direct substitutes within the same family include AP7381-33SA-7 (3.3V output) and AP7381-28SA-7 (2.8V output), provided the voltage requirement differs. For identical 5V output but different packages, consider AP7381-50Y-13 (SOT-89). Verify pinout compatibility and thermal resistance differences before substitution.