RP171N491B-TR-FE

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

The RP171N491B-TR-FE is a CMOS Low Dropout (LDO) voltage regulator manufactured by Nisshinbo Micro Devices. It provides a fixed output voltage of 4.9 V with a maximum output current capability of 150 mA. The device features a typical power supply rejection ratio (PSRR) of 70 dB and a dropout voltage of 250 mV. Operating parameters include a quiescent current of 23 uA, line regulation of 0.02 %/V, and load regulation of 5 mV. It operates within a temperature range of -40°C to +85°C and is housed in an SOT-23-5 package.

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

• CMOS LDO architecture for efficient power management
• Fixed output voltage configuration
• High noise immunity via high PSRR
• Low quiescent current operation

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

• Battery-powered portable devices
• Embedded systems requiring stable voltage rails
• Consumer electronics power supplies

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

Verify the specific part number against official Nisshinbo documentation to confirm the 4.9 V output variant. Ensure compatibility with the SOT-23-5 footprint and thermal requirements. Confirm RoHS compliance status through the manufacturer's environmental declarations before integration into production designs.

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

Select this component when a precise 4.9 V rail is required from a higher input voltage source. Consider the 150 mA current limit and 250 mV dropout voltage relative to the minimum input voltage. Evaluate the 23 uA standby current for battery life optimization in low-power applications.

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

This component belongs to the RP171N series of low-dropout regulators from Nisshinbo Micro Devices. The series is designed for general-purpose power management in compact electronic systems. The manufacturer combines expertise from former Nisshinbo Semiconductor and Ricoh Micro Devices.

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

Cross-reference with other RP171N series variants for different fixed output voltages. Verify pinout compatibility if substituting with similar LDOs from other manufacturers.