R1224N302H-TR-FE

Overview

The R1224N302H-TR-FE is a non-isolated buck DC/DC switching controller from Nisshinbo Micro Devices. It supports an input voltage range of 2.3 V to 18.5 V and delivers adjustable output voltages from 1 V to 18.5 V. The device operates with a fixed switching frequency of 300 kHz and achieves a maximum duty cycle of 100%. Quiescent current is specified at 20 uA. It functions within a temperature range of -40°C to +85°C and is housed in an SOT-23-5 surface-mount package.

Feature Summary

• Supports PWM and VFM control modes for efficient power management
• Enables 100% duty cycle operation for low dropout performance
• Features ultra-low quiescent current for standby efficiency
• Drives external high-side and low-side NMOS transistors

Applications

• Battery-powered portable electronics
• Industrial control systems
• Consumer appliances requiring step-down conversion
• Embedded systems with variable input sources

Procurement Notes

Verify the specific suffix 'H' against the manufacturer's official datasheet to confirm pinout compatibility and electrical tolerances, as variations exist within the R1224N series. Ensure the ordering quantity aligns with the standard reel packaging requirements defined by Nisshinbo Micro Devices. Cross-reference the RoHS compliance status with the latest documentation prior to final procurement decisions.

Selection Notes

Select this component when a wide input voltage range up to 18.5 V is required for buck applications. The 300 kHz switching frequency offers a balance between component size and efficiency. Consider the SOT-23-5 package for space-constrained designs. Verify that the external MOSFET selection matches the controller's drive capabilities and thermal requirements for the intended load conditions.

Part Context

This part belongs to the R1224N series of synchronous and non-synchronous step-down controllers. It is designed for applications requiring high efficiency and wide input voltage ranges. The series includes variants with different switching frequencies and control modes, such as the R1224N102M and R1224N402H, allowing designers to optimize for specific frequency or feature sets.

Replacement Considerations

R1224N302F-TR-FE: Similar specifications with potential differences in internal reference or trim values. R1224N302G-TR-FE: Alternative variant within the same family; verify package and electrical parameter alignment.