R1224N402H-TR-FE

Overview

The R1224N402H-TR-FE is a non-isolated step-down DC/DC switching controller manufactured by Nisshinbo Micro Devices. It operates with an input voltage range of 2.3 V to 18.5 V and supports adjustable output voltages from 1 V to 18.5 V. The device utilizes PWM or VFM control modes and features a fixed switching frequency of 180 kHz. It offers a maximum duty cycle of 100% and consumes a typical operating supply current of 20 uA. The component is housed in an SOT-23-5 package and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Supports adjustable output voltage generation via external feedback network
• Integrates PWM and VFM control modes for optimized efficiency across load ranges
• Features high duty cycle capability for minimal dropout voltage operation
• Designed for low power consumption with ultra-low operating supply current

Applications

• Battery-powered portable electronic devices requiring efficient voltage regulation
• General-purpose step-down power supply architectures in consumer electronics
• Embedded systems utilizing buck converter topologies for core voltage generation

Procurement Notes

Verify the specific suffix 'H' against official datasheets to confirm internal parameter variations, as ordering codes may denote distinct electrical characteristics or packaging configurations. Ensure compatibility with required thermal management solutions given the SOT-23-5 footprint. Cross-reference RoHS compliance status with the manufacturer's latest documentation prior to finalizing procurement orders.

Selection Notes

Select this controller when designing non-synchronous buck converters requiring wide input voltage tolerance up to 18.5 V. Consider the 180 kHz switching frequency for balancing component size and efficiency. Evaluate the need for external high-side and low-side NMOS drivers, as this IC functions strictly as a controller rather than an integrated power stage solution.

Part Context

This component belongs to the R1224N series of switching controllers designed for versatile DC/DC conversion applications. The series focuses on providing flexible control options for external power switches, allowing designers to tailor performance based on specific efficiency and cost requirements within power management integrated circuits.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.