R1223N332E-TR-FE

Overview

The R1223N332E-TR-FE is a step-down DC/DC controller manufactured by Nisshinbo Micro Devices Inc. It supports a maximum input voltage of 13.2V and utilizes PWM/VFM switching modes for efficient power conversion. The device operates at a fixed frequency of 360kHz and provides a single positive output. It is housed in a compact SOT-23-5 package, designed for integration into portable electronic systems requiring regulated lower voltages from higher input sources.

Feature Summary

• Supports combined Pulse Width Modulation (PWM) and Variable Frequency Mode (VFM) operation to optimize efficiency across varying load conditions.

Applications

• Portable consumer electronics
• Battery-powered devices
• Embedded power management systems

Procurement Notes

Verify the specific suffix 'E' against the manufacturer's official documentation to confirm pinout compatibility and functional specifications. Ensure that the required input voltage range aligns with the component's 13.2V maximum rating. Cross-reference the SOT-23-5 footprint dimensions with the target PCB layout to guarantee mechanical fit and thermal performance requirements are met before finalizing procurement.

Selection Notes

Select this component when a low-cost buck controller is required for inputs up to 13.2V. The integrated PWM/VFM mode offers improved light-load efficiency compared to fixed-frequency PWM-only controllers. Consider the 360kHz switching frequency as a balance between component size and electromagnetic interference. Verify that external passive components can support the required output current without exceeding thermal limits.

Part Context

This part belongs to the R1223N series of step-down DC/DC controllers from Nisshinbo Micro Devices. The series is characterized by its ability to drive external N-channel MOSFETs for efficient voltage regulation. The R1223N332E variant specifically denotes the input voltage limit and output configuration within this product family, targeting applications where space constraints and moderate power levels are primary design considerations.

Replacement Considerations

Consult the official datasheet for direct pin-to-pin compatible alternatives within the R1223N series. Verify that any substitute maintains the same 13.2V input limit and SOT-23-5 package outline. Ensure the replacement supports identical PWM/VFM control logic to preserve system stability and efficiency characteristics.

FAQ

What switching modes does the R1223N332E-TR-FE support?

It supports both Pulse Width Modulation (PWM) and Variable Frequency Mode (VFM) to adapt to load changes.

What is the maximum input voltage for this controller?

The maximum supported input voltage is 13.2V.