FAN53555UC18X

Voltage Regulators - DC DC Switching Regulators Overview

The FAN53555UC18X is a digitally programmable synchronous buck regulator from onsemi's TinyBuck series. It operates with an input voltage range of 2.5 V to 5.5 V and delivers up to 5 A of output current. The device features a fixed switching frequency of 2.4 MHz, enabling the use of small external inductors and capacitors. It provides a programmable output voltage range of 600 mV to 1.23 V. Packaged in a compact WLCSP-20 format, it supports operation across temperatures from -40°C to +85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Digitally programmable output voltage allows precise power rail configuration without external resistors.
• Synchronous rectification architecture maintains high efficiency at low load currents.
• Fixed 2.4 MHz switching frequency minimizes required external passive component values.

Voltage Regulators - DC DC Switching Regulators Applications

• Portable computing devices requiring efficient core voltage regulation
• Industrial control systems needing compact power management solutions
• Communication equipment utilizing single-output step-down conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify component authenticity through authorized channels due to potential availability constraints. Confirm specific suffix designations match exact electrical requirements. Check for end-of-life status or obsolescence notices before finalizing procurement plans. Ensure supply chain stability for production continuity.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this model when a 5 A capacity and digital programmability are required within a minimal footprint. Compare against fixed-voltage variants if output adjustment flexibility is unnecessary. Evaluate thermal performance requirements relative to the WLCSP-20 package limitations under heavy load conditions.

Voltage Regulators - DC DC Switching Regulators Part Context

This component belongs to the TinyBuck family, designed for space-constrained applications. It integrates high-side and low-side MOSFETs with a digital controller. The series emphasizes miniaturization while maintaining robust transient response capabilities for sensitive digital loads.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Publicly confirmed substitutes include FAN53555UC08X and FAN53555UC13X. Verify pin compatibility and output voltage ranges before substitution. Cross-reference datasheets for any differences in shutdown functionality or operating temperature specifications.