RN5RK501B-TR-FE

Overview

The RN5RK501B-TR-FE is a step-up DC/DC converter manufactured by Nisshinbo Micro Devices Inc. It operates with an input voltage range of 900 mV to 8 V and provides a fixed output voltage of 5 V at up to 200 mA. The device utilizes VFM (Variable Frequency Modulation) control for high efficiency under light loads. Key electrical parameters include a switching frequency of 100 kHz, a quiescent current of 55 uA, and a power dissipation rating of 420 mW. It functions within a temperature range of -40°C to +85°C and is housed in a SOT-23-5 package.

Feature Summary

• Integrates VFM control architecture to maintain high conversion efficiency during intermittent or light-load operation conditions.
• Supports wide input voltage ranges starting from 900 mV, enabling compatibility with single-cell battery sources.
• Features a compact SOT-23-5 surface-mount package suitable for space-constrained portable electronic designs.

Applications

• Battery-powered portable consumer electronics
• Intermittent operation applications requiring low standby current
• Single-cell lithium-ion or lithium-polymer battery systems

Procurement Notes

Verify the specific suffix 'B' against the manufacturer's official datasheet to confirm pinout and functional configuration, as suffixes often denote distinct internal variations. Ensure the ordering quantity aligns with the factory reel packaging requirements specified in the product documentation. Cross-reference the Mouser part number 848-RN5RK501B-TR-FE with the manufacturer's catalog to validate component authenticity before procurement.

Selection Notes

Select this component when designing circuits that require efficient voltage boosting from low input voltages down to 900 mV. The VFM topology makes it suitable for applications where minimizing quiescent current is critical for extending battery life. Compare the 200 mA output capability and 100 kHz switching frequency against system load requirements and EMI constraints to ensure adequate performance margins.

Part Context

This component belongs to the NC4650 series of boost switching regulators produced by Nisshinbo Micro Devices. The series is characterized by its suitability for intermittent operation modes and optimized efficiency across varying load conditions. It falls under the broader category of PMIC - Power Management ICs, specifically within the Switching Voltage Regulators subcategory.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material. Verify compatibility with alternative components by matching the SOT-23-5 footprint, 5 V fixed output, and 200 mA current specifications.