FAN53745UC01X

Voltage Regulators - DC DC Switching Regulators Overview

The FAN53745UC01X is a synchronous buck regulator from onsemi, operating at a fixed switching frequency of 3.33 MHz with a maximum output current capability of 1 A. It accepts an input voltage range of 2.5 V to 5.5 V and provides a fixed 0.9 V output. The device utilizes a WLCSP-20 package for compact integration. It supports programmable soft-start and includes comprehensive protection features such as over-current, over-temperature, and under-voltage lockout. Designed for high efficiency in space-constrained applications, it operates within a temperature range of -40°C to +85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Synchronous rectification architecture ensures high conversion efficiency across the load range.
• Fixed 3.33 MHz switching frequency enables the use of small external passive components.
• Integrated digital control interface allows for precise regulation and system monitoring.
• Compact WLCSP footprint minimizes printed circuit board area requirements.

Voltage Regulators - DC DC Switching Regulators Applications

• Portable consumer electronics requiring efficient power management
• Embedded systems with strict size constraints
• Battery-powered devices needing extended operational life

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix UC01X to confirm the fixed 0.9 V output voltage variant. Ensure compatibility with the target PCB layout for the WLCSP-20 package. Confirm that the application environment remains within the specified -40°C to +85°C operating temperature range. Check for any recent product change notifications regarding manufacturing sites or materials.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed low voltage output is required without external resistor programming. The 3.33 MHz frequency is suitable for applications prioritizing minimal passive component size over ultra-low noise performance. Compare against other FAN53xx series parts if higher current capacity or adjustable output voltages are needed. Ensure the input supply voltage does not exceed the 5.5 V maximum rating.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the FAN53745 family of synchronous buck regulators designed for portable applications. It complements onsemi's portfolio of power management solutions by offering a balance of efficiency, size, and ease of implementation. The family typically includes variants with different output voltages and packaging options to suit diverse design requirements.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes may include other FAN53745 variants with different output voltages if the 0.9 V requirement can be adjusted. Cross-reference with similar 1 A synchronous buck regulators from other manufacturers only if pin-to-pin compatibility and electrical specifications match exactly.

Voltage Regulators - DC DC Switching Regulators FAQ

What is the fixed output voltage of the FAN53745UC01X?

The FAN53745UC01X provides a fixed output voltage of 0.9 V.

Does the FAN53745UC01X support I2C communication?

Yes, the device features a digital interface that allows for configuration and monitoring via standard communication protocols.