R1224N332M-TR-FE

Overview

The R1224N332M-TR-FE is a Buck DC/DC controller from Nisshinbo Micro Devices. It operates at a switching frequency of 180 kHz with a maximum duty cycle of 100%. The device supports an input voltage range of 2.3 V to 18.5 V and provides an adjustable output voltage between 1 V and 18.5 V. Quiescent current is 20 uA. It functions in non-isolated mode without shutdown control. The component is housed in an SOT-23-5 package, suitable for surface mount installation, and operates within a temperature range of -40°C to +85°C.

Feature Summary

• Supports 100% duty cycle operation for low dropout performance
• Integrates PWM and VFM modes for efficiency optimization
• Features ultra-low quiescent current consumption

Applications

• Battery-powered portable electronics
• Consumer devices requiring efficient step-down conversion
• Industrial equipment power management systems

Procurement Notes

Verify the specific suffix 'M' indicates the fixed 3.3V output setting against the official datasheet. Confirm the SOT-23-5 package type matches the design footprint. Ensure the operating temperature range meets environmental requirements. Check RoHS compliance status via manufacturer documentation before finalizing procurement specifications.

Selection Notes

Select this controller when external power switches are required for higher current handling. The 180 kHz frequency balances size and efficiency. Verify that the external MOSFETs support the 18.5 V input limit. Consider thermal dissipation capabilities of the chosen external components alongside the controller's 20 uA standby current.

Part Context

This part belongs to the R1224N series of switching controllers. It is designed as a step-down converter controller requiring external power transistors. The series focuses on low power consumption and compact solutions for battery-operated applications. It is manufactured by Nisshinbo Micro Devices under the Ricoh brand lineage.

Replacement Considerations

R1224N102M-TR-FE: Different fixed output voltage (1.0V). R1224N252M-TR-FE: Different fixed output voltage (2.5V). Both share identical electrical characteristics and package.