FAN5365UC00X

Voltage Regulators - DC DC Switching Regulators Overview

The FAN5365UC00X is a synchronous buck regulator from onsemi's TinyBuck family, designed for space-constrained applications. It operates with an input voltage range of 2.3 V to 5.5 V and provides a fixed 1.8 V output. The device supports up to 1.8 A output current with a typical quiescent current of 40 µA. It features a 3.35 MHz switching frequency and integrates internal compensation. Packaged in a compact 9-ball WLCSP (3x3 mm), it ensures efficient power conversion within a -40°C to +85°C operating temperature range.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates synchronous rectification for high efficiency in small form factors
• Features fixed 1.8 V output eliminating external resistor requirements
• Includes internal compensation network to minimize external component count
• Supports continuous operation at 3.35 MHz switching frequency

Voltage Regulators - DC DC Switching Regulators Applications

• Portable consumer electronics requiring compact power solutions
• Embedded systems with limited board space constraints
• Battery-powered devices needing efficient voltage regulation
• Industrial control modules operating within standard voltage ranges

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix UC00X confirms the fixed 1.8 V output configuration, as other suffixes may indicate programmable variants. Confirm package integrity upon receipt due to the delicate nature of WLCSP components. Ensure storage conditions comply with moisture sensitivity level requirements to prevent damage during soldering processes. Cross-reference the manufacturer datasheet for latest thermal and electrical specifications before final integration.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 1.8 V rail is required without external programming resistors. It is suitable for designs prioritizing minimal bill of materials and reduced footprint over adjustable output flexibility. Consider the 1.8 A current limit for load requirements and verify that the 3.35 MHz frequency aligns with electromagnetic interference constraints. Evaluate thermal performance under maximum load conditions given the small package size.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the TinyBuck series, which focuses on delivering high-performance DC-DC conversion in ultra-small packages. The FAN5365 variant specifically targets applications requiring stable 1.8 V outputs for logic or memory supplies. It complements other regulators in the portfolio by offering fixed-output simplicity alongside synchronous efficiency.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include the FAN5365UC02X, which shares the same 1.8 A capability and WLCSP-9 package but offers a digitally programmable output voltage instead of a fixed 1.8 V rail. Designers must adjust PCB layout and software configuration if replacing with the programmable variant.