RP111L361D-TR

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

The RP111L361D-TR is a CMOS-based low dropout regulator from the RP111x series, manufactured by Nisshinbo Micro Devices Inc. It provides a fixed 3.6V output with a maximum current of 500mA. The device operates within an input voltage range of 1.4V to 5.25V and features a typical supply current of 80µA. Key electrical characteristics include an output voltage accuracy of ±0.8%, ripple rejection of 75dB at 1kHz, and a dropout voltage of 0.22V typ. at full load. It is housed in a DFN1212-6 package.

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

• Integrated thermal shutdown circuit activates at 165°C junction temperature.
• Built-in foldback protection limits short-circuit current to approximately 50mA.
• Inrush current limit circuit restricts startup surge to 400mA for 180µs.
• Low noise performance with high ripple rejection capability.

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

• Power source for portable communication equipment
• Power source for battery-powered devices
• Power source for cameras, VCRs, and camcorders

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

Verify the specific suffix 'D' indicates the inclusion of the auto discharge function at the off state, as this alters the internal configuration compared to the 'B' variant. Confirm the DFN1212-6 package dimensions match the target PCB footprint. Ensure ceramic capacitors are used for stability, as tantalum types may cause instability due to ESR variations.

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

Select this component when a fixed 3.6V rail is required with up to 500mA load capacity. The DFN1212-6 package offers a compact form factor suitable for space-constrained designs. Consider the 80µA supply current for battery life optimization. Verify that the input voltage remains above the minimum threshold of 1.4V 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. The series includes variants in SOT-23-5 and SOT-89-5 packages. The 'L' designation specifically identifies the DFN1212-6 package option within the product line. The series is designed for good transient response and low noise applications.

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

RP111N361D-TR-FE (SOT-23-5 package)

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

What is the purpose of the CE pin?

The CE (Chip Enable) pin controls the operation of the regulator. It is active high; applying a high voltage enables the output, while a low voltage disables it.

Can the output voltage be adjusted externally?

No, the RP111L361D-TR has a fixed output voltage of 3.6V. Adjustable versions require connecting external resistors to the VFB pin, which is not applicable to this fixed-output model.