R1224N302L-TR-FE

Overview

The R1224N302L-TR-FE is a step-down DC/DC controller manufactured by Nisshinbo Micro Devices Inc. It supports an input voltage range of 2.3V to 18.5V and operates at a switching frequency of 300kHz. The device utilizes PWM/VFM control modes for efficient power conversion. It is housed in a SOT-23-5 package and is designed for operation within a temperature range of -40°C to 85°C. This component functions as a buck converter controller, suitable for low-voltage and mid-voltage power supply applications requiring compact design.

Feature Summary

• Supports wide input voltage range from 2.3V to 18.5V
• Integrates PWM and VFM control modes for optimized efficiency
• Fixed 300kHz switching frequency for compact external component sizing

Applications

• Low-voltage power supply systems
• Mid-voltage power conversion designs
• Battery-powered portable electronics

Procurement Notes

Verify the specific suffix 'L' against official Nisshinbo documentation to confirm pinout and electrical characteristics, as variations exist within the R1224N series. Ensure compatibility with required operating temperatures and input voltage ranges before integration. Cross-reference datasheet revisions to confirm RoHS compliance status and package integrity for surface-mount assembly processes.

Selection Notes

Select this controller when a fixed 300kHz frequency is preferred to minimize passive component size. The wide input range accommodates various battery chemistries and unregulated sources. Consider the SOT-23-5 footprint constraints and thermal dissipation requirements relative to the expected load current and ambient conditions during system layout.

Part Context

This component belongs to the R1224N series of step-down DC/DC controllers from Nisshinbo Micro Devices. The series offers multiple variants distinguished by output voltage settings and package options. The R1224N302L-TR-FE specifically targets applications requiring a balance between efficiency and component count, leveraging internal control logic to drive external MOSFETs for buck topology implementations.

Replacement Considerations

Direct substitutes include other R1224N302 variants such as R1224N302F-TR-FE or R1224N302G-TR-FE, provided the specific suffix differences do not alter critical electrical parameters or pin configurations. Verify functional equivalence regarding control mode and input range before substitution.