XC9302A543MR-G

Overview

The XC9302A543MR-G is a step-up and step-down DC/DC controller IC manufactured by Torex Semiconductor. It operates with a fixed switching frequency of 300 kHz and supports an input supply voltage range of 2 V to 10 V. The device features a maximum duty cycle of 92% and provides a fixed output voltage of 5 V. It is designed for non-isolated applications, supporting boost and buck topologies within a single SOT-25-5 package. The component functions without synchronous rectification or clock synchronization capabilities.

Feature Summary

• Integrated step-up and step-down DC/DC control functionality
• Fixed 300 kHz internal switching frequency operation
• Wide operating supply voltage range from 2 V to 10 V
• Non-isolated topology support in compact surface-mount packaging

Applications

• Battery-powered portable electronic devices requiring voltage regulation
• Systems needing both step-up and step-down conversion capabilities
• General-purpose power management circuits in consumer electronics

Procurement Notes

Verify the specific suffix MR-G against official Torex documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with the required 300 kHz switching frequency and 5 V fixed output configuration. Cross-reference the SOT-25-5 footprint dimensions with PCB layout guidelines before finalizing procurement orders.

Selection Notes

Select this component when a fixed 5 V output is required from variable input sources between 2 V and 10 V. The 300 kHz frequency allows for smaller external passive components compared to lower-frequency alternatives. Consider the lack of synchronous rectification when evaluating efficiency requirements for high-current loads.

Part Context

This part belongs to the XC9302 series of PWM switching controllers designed for step-up and step-down applications. It shares architectural similarities with other members like the XC9302A503MR-G but differs in specific electrical parameters such as switching frequency and output voltage settings defined by the manufacturer's coding system.

Replacement Considerations

Direct substitutes include XC9302A503MR-G and XC9302A523MR-G from the same manufacturer family. Verify that alternative parts match the required 300 kHz frequency and 5 V output specification. Check pinout compatibility and thermal performance characteristics before implementing any cross-model replacements.