R1223N152H-TR-FE

Overview

The R1223N152H-TR-FE is a step-down DC/DC controller manufactured by Nisshinbo Micro Devices. It supports an input voltage range of 2.3V to 13.2V and operates with a fixed switching frequency of 500kHz. The device features PWM/VFM hybrid control modes and allows for a maximum duty cycle of 100%. It is housed in an SOT-23-5 package and is designed for efficient power management in portable applications.

Feature Summary

• Supports 100% duty cycle operation for low dropout performance
• Integrates PWM and VFM hybrid control for optimized efficiency
• Fixed 500kHz switching frequency reduces external component size

Applications

• Portable electronic devices requiring efficient step-down conversion
• Battery-powered systems utilizing PWM/VFM control strategies
• General-purpose DC/DC power supply designs within 13.2V input limits

Procurement Notes

Verify the specific suffix 'H' against the official datasheet to confirm pinout and electrical characteristics, as suffixes often denote package or temperature variations. Ensure compatibility with the required 500kHz switching frequency and 13.2V maximum input rating for your circuit design before finalizing procurement.

Selection Notes

Select this component when a fixed-frequency step-down solution is preferred over variable-frequency alternatives. The 500kHz frequency offers a balance between transient response and EMI. Consider the SOT-23-5 package constraints and ensure the thermal design accommodates the expected load current and input voltage conditions.

Part Context

This part belongs to the R1223N series of switching controllers from Nisshinbo Micro Devices. The series is characterized by its ability to drive external MOSFETs for buck converter topologies. The R1223N152H variant specifically targets applications requiring stable operation up to 13.2V input with integrated protection features typical of the family.

Replacement Considerations

Direct substitutes include other R1223N variants with compatible input ranges and switching frequencies. Verify pin-to-pin compatibility and control mode similarities when considering alternative part numbers from the same manufacturer or competitors.