R1224N152F-TR-FE

Overview

The R1224N152F-TR-FE is a step-down DC-DC controller manufactured by 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 integrates PWM and VFM control modes for efficient power management. It is housed in a compact SOT-23-5 package and functions within an operating temperature range of -40°C to +85°C. This component serves as a positive output buck regulator controller designed for space-constrained applications requiring reliable voltage conversion.

Feature Summary

• Integrates Pulse Width Modulation (PWM) and Variable Frequency Mode (VFM) control strategies to optimize efficiency across varying load conditions.
• Supports a wide input voltage range up to 18.5 V, enabling compatibility with diverse power sources.
• Operates at a fixed switching frequency of 500 kHz to minimize external component size.
• Designed for robust performance across industrial temperature ranges from -40°C to +85°C.

Applications

• Portable electronic devices requiring efficient step-down voltage regulation
• Battery-powered systems utilizing lithium-ion or lithium-polymer cells
• Industrial equipment needing stable DC-DC conversion within harsh environments
• Consumer electronics with space-constrained printed circuit board layouts

Procurement Notes

Verify the specific suffix codes against official Nisshinbo documentation to ensure correct packaging and tape-and-reel specifications. Confirm that the SOT-23-5 package variant matches your PCB footprint requirements. Cross-reference the thermal characteristics with your system's heat dissipation capabilities. Ensure compliance with RoHS directives if required for your target market. Validate the input voltage range against your actual supply rail to prevent operational faults.

Selection Notes

Choose this controller when a wide input voltage range up to 18.5 V is necessary for buck applications. Select it for designs requiring both high efficiency at light loads via VFM and stable regulation under heavy loads using PWM. Consider this part for systems where a 500 kHz switching frequency allows for smaller inductors and capacitors. Ensure the SOT-23-5 package fits within your spatial constraints and thermal design limits.

Part Context

This component belongs to the R1224N series of switching controllers from Nisshinbo Micro Devices. The series focuses on providing efficient power management solutions for portable and industrial applications. The R1224N152F-TR-FE specifically addresses the need for wide input voltage tolerance and flexible control modes. It complements other PMIC offerings by providing a dedicated buck controller solution rather than a fully integrated converter.

Replacement Considerations

Direct substitutes include other Nisshinbo R1224N series variants with different output voltage settings or control modes. Verify pin compatibility and electrical parameters before swapping with generic buck controllers. Consult official cross-reference lists for equivalent parts from other manufacturers ensuring matching input ranges and switching frequencies.

FAQ

Does the R1224N152F-TR-FE support synchronous rectification?

No, this component is a non-synchronous buck controller. External MOSFETs must be selected and driven appropriately for the power stage.

What is the maximum input voltage for this controller?

The maximum supported input voltage is 18.5 V. Exceeding this limit may damage the device.