R1224N202F-TR-FE

Overview

The R1224N202F-TR-FE is a non-isolated Buck DC/DC controller manufactured by Nisshinbo Micro Devices. It operates within an input voltage range of 2.3 V to 18.5 V and delivers an adjustable output voltage from 1 V to 18.5 V. The device supports a switching frequency of 500 kHz with a maximum duty cycle of 100%. It functions in a SOT-23-5 surface-mount package and is rated for an operating temperature range of -40°C to +85°C.

Feature Summary

• Supports PWM and VFM control modes for efficient step-down conversion
• Enables 100% duty cycle operation for low dropout performance
• Includes enable pin functionality for power management control

Applications

• Battery-powered portable electronic devices
• General-purpose step-down power supply circuits
• Embedded systems requiring adjustable voltage regulation

Procurement Notes

Verify the specific suffix 'F' against official datasheets to confirm the fixed 500 kHz switching frequency, as variations exist within the R1224N series. Ensure compatibility with external MOSFETs and passive components for the target current and voltage requirements. Confirm RoHS compliance status through the manufacturer's latest documentation before finalizing procurement specifications.

Selection Notes

Select this component when a fixed 500 kHz switching frequency is required for the application design. It is suitable for designs needing an adjustable output voltage up to 18.5 V with a wide input range. Consider the SOT-23-5 package size constraints and the need for external power switches, as this is a controller rather than an integrated regulator.

Part Context

This part belongs to the R1224N series of Buck DC/DC controllers from Nisshinbo Micro Devices. The series offers various switching frequencies and output configurations. The R1224N202F variant specifically provides a fixed 500 kHz frequency, distinguishing it from other models like the 180 kHz or 1 MHz variants in the same family.

Replacement Considerations

Direct substitutes include R1224N102M-TR-FE (180 kHz) and R1224N252G-TR-FE (variable/fixed depending on sub-type). Verify that the alternative frequency matches EMI and transient response requirements. Pinout compatibility in SOT-23-5 is generally consistent across the series.