R1224N332L-TR-FE

Overview

The R1224N332L-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 utilizes PWM and VFM control modes with a switching frequency of 180 kHz. It supports up to 100% duty cycle and functions within a temperature range of -40°C to +85°C. Packaged in SOT-23-5, it consumes 20 µA of operating supply current.

Feature Summary

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

Applications

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

Procurement Notes

Verify the specific suffix 'L' against official datasheets to confirm package and tape specifications. Ensure compatibility with external MOSFET selection for the Buck topology. Cross-reference thermal requirements for the SOT-23-5 package in high-duty applications.

Selection Notes

Select this component when a fixed 3.3V output is required from a wide input range. Consider the 180 kHz switching frequency for passive component sizing. Evaluate the SOT-23-5 footprint constraints against available PCB space.

Part Context

This part belongs to the R1224N series of Buck DC/DC controllers. It shares architectural similarities with variants like R1224N102M and R1224N182E but differs in output configuration. While others offer adjustable or different fixed voltages, this model provides a dedicated 3.3V output.

Replacement Considerations

R1224N182E-TR-FE (Fixed 1.8V Output)

FAQ

What control modes does the R1224N332L support?

It supports both Pulse Width Modulation (PWM) and Variable Frequency Mode (VFM).

Is the output voltage adjustable?

No, the R1224N332L provides a fixed output voltage of 3.3 V.