R1224N332H-TR-FE

Overview

The R1224N332H-TR-FE is a step-down DC/DC controller manufactured by Nisshinbo Micro Devices. It operates with an input voltage range of 2.3V to 18.5V and supports a switching frequency of 500kHz. The device utilizes PWM/VFM control modes for efficient power conversion. It features a fixed output voltage setting determined by the part number suffix, designed for single-output applications. The controller drives external high-side and low-side NMOS transistors to achieve buck topology performance. It is housed in an SOT-23-5 package and rated for operation between -40°C and +85°C.

Feature Summary

• Supports PWM and VFM control modes for optimized efficiency across load ranges
• Enables 100% duty cycle operation for minimal dropout voltage
• Designed to drive external high-side and low-side NMOS transistors
• Fixed output voltage configuration via internal resistor divider

Applications

• Battery-powered portable electronic devices
• General-purpose step-down power supply circuits
• Embedded systems requiring stable voltage regulation
• Industrial equipment with wide input voltage ranges

Procurement Notes

Verify the specific output voltage setting associated with the '332' suffix against the official datasheet before ordering. Confirm that the required external MOSFETs are compatible with the controller's drive capabilities. Ensure the application environment stays within the specified temperature range of -40°C to +85°C. Check for any updated revision notes regarding electrical characteristics or pinout definitions.

Selection Notes

Select this component when a fixed output voltage is acceptable and external feedback resistors are undesirable. It is suitable for designs requiring a compact SOT-23-5 footprint. Consider the 500kHz switching frequency for passive component size trade-offs. Ensure the input voltage does not exceed the 18.5V maximum rating during transient conditions.

Part Context

This part belongs to the R1224N series of switch controllers from Nisshinbo Micro Devices. The series focuses on step-down topologies using external NMOS pairs. Different suffixes indicate various fixed output voltages. The TR-FE designation indicates tape and reel packaging compliant with environmental standards.

Replacement Considerations

Direct substitutes include other R1224N variants with matching output voltage settings, such as R1224N132H or R1224N252H, provided the fixed output aligns with design requirements. Verify pin compatibility and thermal performance when swapping models.