R1131N121B5-TR-FE

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

The R1131N121B5-TR-FE is a CMOS low-dropout regulator manufactured by Nisshinbo Micro Devices. It provides a fixed positive output voltage of 1.25 V with a maximum output current of 300 mA. The device operates within an input voltage range of 1.8 V to 6.0 V and maintains stability in the SOT-23-5 surface-mount package. Key electrical specifications include a typical dropout voltage of 400 mV at full load, a quiescent current of 1.5 µA, and a line regulation of 0.04 %/V. It supports an operating temperature range from -40 °C to +85 °C.

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

• Provides a stable fixed 1.25 V output for sensitive analog and digital circuits
• Features ultra-low quiescent current consumption to extend battery life
• Maintains output regulation with minimal voltage drop under load

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

• Battery-powered portable electronic devices requiring efficient power management
• Embedded systems needing a clean, stable reference voltage source
• Low-power sensor nodes and IoT modules

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

Verify the specific suffix B5 against official datasheets to confirm pinout and tolerance specifications. Ensure the ordering code matches the exact manufacturer part number to avoid compatibility issues with existing PCB footprints. Cross-reference RoHS compliance status if required by regional regulations.

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

Select this component when a precise 1.25 V rail is required with minimal static power draw. Compare dropout characteristics against load requirements to ensure regulation holds at minimum input voltages. Consider thermal dissipation limits in the SOT-23-5 package based on expected current loads and ambient temperatures.

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

This part belongs to the R1131N series of low-dropout regulators designed for high-efficiency power management. It complements other fixed-voltage variants in the lineup, offering a specialized output level for applications where standard 1.2 V or 1.8 V rails are unsuitable. The series emphasizes low noise and high PSRR for signal integrity.

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

Direct substitutes may include other 1.25 V LDOs from Nisshinbo or competitors with matching SOT-23-5 pinouts. Verify that replacement parts meet the same 300 mA current rating and quiescent current specifications to maintain system performance.