FAN53555BUC79X

Voltage Regulators - DC DC Switching Regulators Overview

The FAN53555BUC79X is a synchronous buck regulator from the TinyBuck family, manufactured by onsemi. 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 digitally programmable output voltage ranging from 600 mV to 1.411 V. It integrates a fixed switching frequency of 2.4 MHz and supports Pulse Width Modulation (PWM) control. The component is housed in a 20-WLCSP package measuring approximately 1.96 mm by 1.56 mm. It functions within a temperature range of -40 °C to +85 °C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Digitally programmable output voltage allows precise configuration for various load requirements without external resistor dividers.
• Synchronous rectification architecture ensures high efficiency across wide load ranges by minimizing conduction losses.
• Integrated power switches and control logic enable a compact solution suitable for space-constrained mobile applications.

Voltage Regulators - DC DC Switching Regulators Applications

• Smartphones and tablets requiring efficient core voltage regulation
• Portable computing devices needing stable power delivery
• Wireless communication modules with dynamic power demands

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix code against official datasheets to confirm output voltage settings and package variations. Confirm RoHS compliance status and material declarations prior to integration. Check for end-of-life notices or production change notifications that may affect long-term availability. Ensure compatibility with existing PCB footprint designs when sourcing replacements.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when high current density and digital programmability are required in a minimal footprint. Compare against fixed-output variants if voltage flexibility is not needed. Evaluate thermal performance constraints given the small WLCSP package size. Consider system-level efficiency requirements at light and heavy loads to determine suitability over alternative regulators.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the TinyBuck series of digitally programmable DC-DC converters. It shares architectural similarities with other models in the FAN53555 family but differs in specific output voltage configurations defined by its unique ordering suffix. The series targets portable electronics where board space and power efficiency are critical design parameters.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

FAN53555UC03X

Voltage Regulators - DC DC Switching Regulators FAQ

What is the maximum output current capability of the FAN53555BUC79X?

The device supports a continuous output current of up to 5 A.

Does the FAN53555BUC79X support pulse frequency modulation?

Yes, the regulator can operate in PFM mode for improved light-load efficiency.