RP111N281D-TR-FE

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

The RP111N281D-TR-FE is a CMOS-based low dropout regulator from the RP111x series, providing a fixed 2.8V output with a maximum current of 500mA. It operates within an input voltage range of 1.4V to 5.25V and features a typical dropout voltage of 0.23V at full load. The device includes an auto-discharge function for the off state, ensuring rapid output voltage decay. Key electrical characteristics include a ripple rejection of 75dB at 1kHz, supply current of 80µA, and standby current of 0.1µA. Output voltage accuracy is ±0.8% at 25°C, with a temperature coefficient of ±30ppm/°C.

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

• Built-in auto-discharge circuit rapidly reduces output voltage when disabled
• Enhanced load transient response minimizes output voltage overshoot and undershoot
• Integrated thermal shutdown and foldback protection circuits ensure operational safety

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

• Power source for portable communication equipment
• Power source for battery-powered devices such as cameras and camcorders
• Power source for electrical home appliances

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

Verify the specific suffix 'D' indicates the inclusion of the auto-discharge function, which distinguishes this variant from versions without it. Confirm the package type matches the SOT-23-5 designation in the selection guide. Ensure compatibility with ceramic capacitors of 1.0µF or more for stable operation as recommended by the manufacturer.

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

Select this component when a fixed 2.8V rail is required with high transient response capabilities. The SOT-23-5 package offers a compact footprint suitable for space-constrained designs. Consider the auto-discharge feature if fast power-down times are necessary for system efficiency. Verify that the input voltage remains within the 1.4V to 5.25V range under all operating conditions.

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

This part belongs to the RP111x series of low voltage LDO regulators manufactured by Nisshinbo Micro Devices. The series is characterized by its CMOS construction, allowing for low quiescent current and good line regulation. The RP111Nxx1D variants specifically utilize the SOT-23-5 package and include the auto-discharge functionality for improved power management in portable applications.

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

RP111N281B-TR-FE (identical specifications but lacks the auto-discharge function)