R1225N502K-TR-FE

Overview

The R1225N502K-TR-FE is a step-down DC/DC controller IC manufactured by Nisshinbo Micro Devices. It operates with an input voltage range of 2.3 V to 18.5 V and supports a switching frequency of 180 kHz. The device utilizes voltage mode control for its single output configuration. It is designed for operation within a temperature range of -40°C to +85°C. The component is housed in a SOT-23W-6 package.

Feature Summary

• Supports PWM and VFM switching modes for efficient power management
• Integrates internal compensation network to simplify external circuit design
• Features low standby current consumption for battery-powered applications

Applications

• Portable electronic devices requiring efficient power conversion
• Battery-operated equipment needing extended runtime
• General-purpose step-down power supply circuits

Procurement Notes

Verify the specific suffix K against the official datasheet to confirm the exact output voltage setting or tolerance requirements. Ensure the SOT-23W-6 package dimensions align with your PCB footprint constraints. Confirm that the 180 kHz switching frequency meets your electromagnetic interference (EMI) standards and inductor selection criteria before finalizing the procurement order.

Selection Notes

Select this controller when a buck topology with voltage mode control is required for inputs up to 18.5 V. Consider the integrated compensation feature if minimizing external component count is a priority. Evaluate the thermal performance within the specified -40°C to +85°C operating range to ensure reliability under your specific load conditions and ambient temperatures.

Part Context

This component belongs to the R1225N series of switching controllers from Nisshinbo Micro Devices. The series focuses on providing efficient step-down power solutions with compact packaging options. The R1225N502K-TR-FE variant specifically addresses applications requiring a wide input voltage range and stable voltage regulation in a small form factor.

Replacement Considerations

Consult the official datasheet for direct pin-compatible alternatives within the R1225N family, such as the R1225N332C-TR-FE, which shares similar functional characteristics but may differ in specific electrical parameters or output settings.