R1224N502M-TR-FE

Overview

The R1224N502M-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 provides an adjustable output voltage from 1 V to 18.5 V. The device supports a switching frequency of 180 kHz with a maximum duty cycle of 100%. It features ultra-low operating supply current of 20 uA and functions reliably across a temperature range of -40°C to +85°C. Packaged in SOT-23-5, it utilizes PWM step-down technology for efficient power management.

Feature Summary

• Supports PWM/VFM operation modes for optimized efficiency across varying load conditions
• Enables wide input voltage compatibility up to 18.5 V for flexible system integration
• Achieves minimal quiescent current consumption to extend battery life in portable applications

Applications

• Battery-powered portable electronic devices requiring efficient step-down conversion
• Embedded systems utilizing single-cell or multi-cell battery configurations
• General-purpose DC/DC power regulation in compact consumer electronics

Procurement Notes

Verify the exact suffix 'M' corresponds to the specific output voltage setting required for your design, as this series uses coding for fixed or adjustable parameters. Confirm the package type is SOT-23-5 and check RoHS compliance status through official manufacturer documentation before finalizing procurement. Ensure thermal requirements align with the specified operating temperature range.

Selection Notes

Select this component when designing buck converters requiring low standby current and wide input voltage tolerance. The adjustable output capability allows flexibility in target voltage selection. Consider the 180 kHz switching frequency for balancing size and efficiency. Verify that the external MOSFETs and inductors are rated for the maximum expected currents and voltages associated with the 18.5 V input limit.

Part Context

This part belongs to the R1224N series of switching controllers from Nisshinbo Micro Devices. The series focuses on high-efficiency step-down conversion with low power consumption characteristics. The R1224N502M variant is specifically configured for Buck topology applications, distinguishing it from LDO regulators like the R1524N series which offer different regulation methods and performance profiles.

Replacement Considerations

Direct substitutes within the same family include R1224N102M-TR-FE, R1224N152F-TR-FE, R1224N182F-TR-FE, R1224N222E-TR-FE, and R1224N252G-TR-FE. These alternatives share identical packaging and core controller functionality but differ in internal resistor settings for output voltage configuration. Verify the specific voltage setting required by your circuit when choosing a cross-reference.