R1224N252E-TR-FE

Overview

The R1224N252E-TR-FE is a non-isolated Buck DC/DC controller manufactured by Nisshinbo Micro Devices. It operates within an input voltage range of 2.3 V to 18.5 V and delivers a fixed output voltage of 2.5 V. The device supports a switching frequency of 300 kHz with a maximum duty cycle of 100%. It functions in a SOT-23-5 package and maintains an operating supply current of 20 uA. The component is rated for temperatures between -40°C and +85°C.

Feature Summary

• Supports both Pulse Width Modulation (PWM) and Variable Frequency Mode (VFM) control techniques for efficient power conversion.
• Capable of achieving a maximum duty cycle of 100% to maintain regulation under low input-to-output voltage differential conditions.
• Features ultra-low operating supply current to minimize quiescent power consumption during standby or light load operations.

Applications

• Battery-powered portable electronic devices requiring efficient step-down power management.
• Embedded systems utilizing microcontrollers or sensors with fixed 2.5 V logic requirements.
• General-purpose DC/DC conversion stages in consumer electronics and industrial instrumentation.

Procurement Notes

Verify the specific suffix 'TR-FE' to confirm tape-and-reel packaging and lead-free compliance status. Ensure the ordering quantity aligns with standard reel quantities, typically 3000 units per reel, as specified by the manufacturer's standard packaging guidelines. Cross-reference the RoHS declaration details provided in the official datasheet to meet environmental regulatory requirements for your target market.

Selection Notes

Select this component when a fixed 2.5 V output is required from a wide input voltage range up to 18.5 V. The choice is driven by the need for high efficiency across varying load conditions via PWM/VFM auto-switching. Consider the SOT-23-5 package size constraints and the 300 kHz switching frequency for filter component selection. This controller is suitable for designs where low quiescent current is critical for battery life extension.

Part Context

This part belongs to the R1224N series of switching controllers from Nisshinbo Micro Devices. The series focuses on compact, high-efficiency step-down solutions. The R1224N252E variant specifically targets applications needing a stable 2.5 V rail. It complements other variants in the family that offer different fixed output voltages, providing designers with standardized options for various logic levels.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult the manufacturer's official cross-reference guides or contact Nisshinbo Micro Devices directly for verified alternative components that match the electrical specifications and pinout configuration.