R1224N332E-TR-FE

Overview

The R1224N332E-TR-FE is a non-isolated Buck DC/DC controller manufactured by 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 3.3 V. The device supports a switching frequency of 500 kHz and achieves a maximum duty cycle of 100%. It functions within a temperature range of -40°C to +85°C and consumes a typical operating supply current of 20 µA. The component is housed in an SOT-23-5 surface-mount package.

Feature Summary

• Supports PWM and VFM control modes for efficient step-down conversion
• Enables continuous conduction mode via 100% maximum duty cycle capability
• Designed for low power consumption with minimal quiescent current draw

Applications

• Portable battery-powered electronic devices
• General-purpose step-down power supply circuits
• Embedded systems requiring stable 3.3V logic rails

Procurement Notes

Verify the specific suffix E against official Nisshinbo documentation to confirm pinout and electrical tolerances. Ensure the SOT-23-5 footprint matches your PCB layout requirements. Confirm that the 500 kHz switching frequency aligns with your external inductor and capacitor selection for optimal ripple performance. Check RoHS compliance status if required for your manufacturing process.

Selection Notes

Select this controller when a fixed 3.3V output is required from a wide input voltage range up to 18.5V. The 500 kHz frequency allows for smaller passive components compared to lower-frequency alternatives. Consider the SOT-23-5 package size constraints and thermal dissipation needs. Verify that the external MOSFETs selected can handle the switching speed and current requirements associated with this controller.

Part Context

This component belongs to the R1224N series of switching controllers from Nisshinbo Micro Devices. The series focuses on buck topology converters suitable for portable applications. The R1224N332E variant specifically provides a fixed 3.3V output, distinguishing it from adjustable or other fixed voltage options within the same family line.

Replacement Considerations

• R1224N332G-TR-FE
• R1224N332F-TR-FE