AP7381-28SA-7

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

The AP7381-28SA-7 is a positive voltage regulator IC from the AP7381 series, manufactured by Diodes Incorporated. It provides a fixed output voltage of 2.8V with a maximum output current of 150mA. The device supports an 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 dropout voltage of 1000mV at 100mA, line regulation of 0.05%/V, load regulation of 0.5%, and a typical power supply rejection ratio (PSRR) of 60dB. It features ultra-low ground current of 2.5µA at no load.

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

• Ultra-low quiescent current for extended battery life in portable devices
• Wide input voltage range supporting up to 40V
• Integrated thermal shutdown and short-circuit current protection
• Compatible with low ESR ceramic capacitors

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

• E-meters
• Battery-powered equipment
• Laptops and notebook computers
• Portable information appliances

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

Verify component authenticity through authorized Diodes Incorporated channels or certified distributors. Confirm that the received parts match the specific SOT23-3 package marking code D9C. Ensure compliance with RoHS 3 and REACH regulations as specified in the datasheet. Validate storage conditions to maintain moisture sensitivity level 1 integrity prior to soldering.

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

Select this component when a fixed 2.8V rail is required from inputs up to 40V. The SOT23-3 package is suitable for space-constrained designs. Ensure the application does not exceed the 150mA output current limit. Verify that the input voltage remains above the minimum threshold of 3.3V for proper operation.

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

This part belongs to the AP7381 series of wide input voltage LDO regulators. It shares architectural similarities with other variants like the AP7381-33SA-7 but differs in fixed output voltage. The series is designed for USB and portable applications requiring high accuracy and low standby power consumption.

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

Direct pin-compatible replacements within the same series include AP7381-33SA-7 (3.3V), AP7381-50SA-7 (5.0V), and AP7381-70SA-7 (7.0V). For different packages, consider AP7381-28Y-13 (SOT89) or legacy TO92 versions, noting that TO92 is not recommended for new designs.