R1224N552H-TR-FE

Overview

The R1224N552H-TR-FE is a non-isolated Buck DC/DC controller IC from Nisshinbo Micro Devices. It operates with an input voltage range of 2.3 V to 18.5 V and delivers a fixed output voltage of 5.5 V. The device features a switching frequency of 500 kHz and supports a maximum duty cycle of 100%. It functions within a temperature range of -40°C to +85°C, consumes 40 µA of operating supply current, and is housed in an SOT-23-5 package.

Feature Summary

• Supports 100% maximum duty cycle for low dropout operation
• Integrates PWM control for efficient step-down conversion
• Operates with ultra-low quiescent current consumption

Applications

• Portable battery-powered electronic devices
• Embedded power management systems
• General-purpose DC-DC voltage regulation

Procurement Notes

Verify the specific suffix against official documentation to confirm the exact fixed output voltage and tolerance. Ensure the ordering quantity aligns with the manufacturer's standard reel packaging requirements. Cross-reference the datasheet revision date to guarantee compatibility with current design specifications.

Selection Notes

Select this component when a fixed 5.5 V output is required from a wide input voltage range up to 18.5 V. Consider the 500 kHz switching frequency for balancing efficiency and external component size. Verify that the SOT-23-5 package fits the available PCB space and thermal constraints.

Part Context

This part belongs to the R1224N series of switching controllers designed for portable applications. It utilizes a Buck topology to efficiently step down voltage. The series is characterized by low power consumption and compact packaging, suitable for space-constrained consumer electronics and industrial modules requiring stable voltage regulation.

Replacement Considerations

Consult official substitution lists for compatible parts within the same family or alternative manufacturers offering identical pinouts and electrical characteristics.