R1224N342H-TR-FE

Overview

The R1224N342H-TR-FE is a non-isolated buck DC/DC controller IC from Nisshinbo Micro Devices. It operates with an input voltage range of 2.3 V to 18.5 V and supports a switching frequency of 500 kHz. The device features PWM and VFM modes for efficient power management. It provides one adjustable output channel, capable of generating voltages between 1 V and 18.5 V. The maximum duty cycle reaches 100%, and the quiescent current is 20 uA. It functions within a temperature range of -40°C to +85°C and is housed in an SOT-23-5 package.

Feature Summary

• Supports both Pulse Width Modulation (PWM) and Variable Frequency Mode (VFM) for optimized efficiency across load conditions
• Achieves high efficiency through a maximum duty cycle of 100% suitable for low dropout applications
• Maintains low power consumption with a typical operating supply current of 20 uA

Applications

• Step-down DC-DC power conversion circuits
• Battery-powered portable electronic devices
• General purpose voltage regulation systems

Procurement Notes

Verify component authenticity by cross-referencing the manufacturer part number with official datasheets. Confirm that the SOT-23-5 package matches design requirements. Ensure the specified input voltage range and switching frequency align with system constraints. Check RoHS compliance status if environmental regulations apply to the final assembly.

Selection Notes

Select this controller when a compact solution for step-down conversion is required. The wide input voltage range accommodates various battery types. The choice between PWM and VFM modes should be based on efficiency needs at light versus heavy loads. Consider the thermal performance within the specified operating temperature range during circuit design.

Part Context

This component belongs to the R1224N series of switching controllers designed for buck topologies. It serves as a core power management element in systems requiring regulated lower voltages from higher sources. The series emphasizes small footprint and energy efficiency for modern portable electronics.

Replacement Considerations

Compatible alternatives within the same family include models like R1224N102M-TR-FE and R1224N252G-TR-FE. These parts share similar buck controller architectures but may differ in specific fixed output configurations or internal reference settings. Verify electrical compatibility before substitution.