RP400K181A-TR

Voltage Regulators - DC DC Switching Regulators Overview

The RP400K181A-TR is a current mode PWM/VFM step-up DC/DC converter manufactured by Nisshinbo Micro Devices. It operates with an input voltage range of 800 mV to 5.5 V and provides a fixed output voltage of 1.8 V. The device supports an output current of 200 mA and functions at a switching frequency of 700 kHz. It is housed in a DFN-1820-6 package and is rated for operation between -40°C and +85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates current mode PWM and VFM control modes for optimized efficiency across varying load conditions.
• Features a wide input voltage range starting from 800 mV, enabling compatibility with single-cell battery sources.
• Utilizes a compact DFN-1820-6 surface-mount package designed for space-constrained PCB layouts.

Voltage Regulators - DC DC Switching Regulators Applications

• Portable electronic devices requiring efficient power management from low-voltage sources
• Battery-powered consumer electronics utilizing single-cell lithium-ion or lithium-polymer batteries
• Embedded systems needing stable 1.8 V regulation from variable input voltages

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix and tape-and-reel configuration against the manufacturer's latest datasheet before ordering. Confirm that the DFN-1820-6 footprint matches your PCB design requirements. Ensure thermal dissipation capabilities are adequate for the intended operating environment and load currents.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a step-up topology is required for inputs below the desired output level. Consider the 200 mA output limit and 700 kHz switching frequency for filter component selection. Evaluate the need for VFM light-load efficiency versus PWM continuous conduction based on application duty cycles.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the RP400K series of high-efficiency step-up DC/DC converters from Nisshinbo. The series is characterized by its ability to operate from very low input voltages, making it suitable for energy harvesting and battery-backed applications where maximizing runtime is critical.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes within the same series include RP400K variants with different fixed output voltages, such as RP400K301A-TR for 3.0 V output. Cross-series replacements require verification of pin compatibility and electrical specifications.