R1223N202H-TR-FE

Overview

The R1223N202H-TR-FE is a positive output step-down DC-DC controller IC manufactured by Ricoh. It operates with an input voltage range of 2.3 V to 13.2 V and provides a fixed output voltage of 2.0 V. The device utilizes PWM/VFM switching modes at a frequency of 500 kHz. It features a maximum duty cycle of 100% and consumes a typical operating supply current of 140 µA. The component is housed in an SOT-23-5 package and is designed for non-isolated buck converter topologies within an operating temperature range of -40°C to +85°C.

Feature Summary

• Supports PWM and VFM switching modes for efficient power conversion
• Enables continuous conduction mode with 100% maximum duty cycle capability
• Operates from low input voltages down to 2.3 V

Applications

• Step-down DC-DC conversion in portable electronic devices
• Power management in smartphones and laptops
• Voltage regulation in power banks

Procurement Notes

Verify the manufacturer designation, as some sources list Nisshinbo Micro Devices while others specify Ricoh. Confirm the specific output voltage variant matches the design requirement, as the R1223N series includes multiple fixed voltage options. Ensure the SOT-23-5 package type is compatible with the PCB footprint. Check for obsolete status or lifecycle changes before finalizing procurement plans.

Selection Notes

Select this component when a fixed 2.0 V output is required from an input range up to 13.2 V. The 500 kHz switching frequency allows for compact external component sizing. Consider the 140 µA quiescent current for battery-powered applications. Verify that the SOT-23-5 package fits the available board space and thermal constraints for the intended application environment.

Part Context

This part belongs to the R1223N series of DC-DC controllers. The series offers various fixed output voltages tailored for different logic levels. The '202' suffix typically indicates the 2.0 V output version. These controllers are designed for high efficiency in space-constrained mobile and consumer electronics applications requiring reliable step-down voltage regulation.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Cross-referencing requires verifying pin compatibility, electrical specifications, and package dimensions with alternative Buck controllers from other manufacturers.