FAN53555BUC18X

Voltage Regulators - DC DC Switching Regulators Overview

The FAN53555BUC18X is a synchronous step-down switching regulator from onsemi's TinyBuck series. It operates with an input voltage range of 2.5 V to 5.5 V and delivers a programmable output voltage between 0.6 V and 1.23 V. The device supports a maximum continuous output current of 5 A at a fixed switching frequency of 2.4 MHz. It is housed in a compact 20-WLCSP package measuring 1.96 mm by 1.56 mm. The component functions within an ambient temperature range of -40 °C to +85 °C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates synchronous rectification for high efficiency in a small footprint
• Features digitally programmable output voltage control
• Utilizes a tiny WLCSP package for space-constrained designs

Voltage Regulators - DC DC Switching Regulators Applications

• Portable computing devices
• Cloud systems and computing infrastructure
• General-purpose digital load power supplies

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the current manufacturing status before procurement, as this specific part number may be obsolete or subject to end-of-life notices. Confirm availability through authorized distributors or direct manufacturer channels. Ensure that any substitute components meet the required electrical specifications and physical dimensions for your application.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a high-current buck converter is needed in a minimal package size. The fixed 2.4 MHz frequency allows for smaller external passive components compared to lower-frequency alternatives. Verify that the required output voltage falls within the 0.6 V to 1.23 V programmable range defined for this specific suffix variant.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the FAN53555 family of TinyBuck regulators, designed for portable and embedded applications requiring efficient power conversion. The BUC18X suffix indicates a specific output voltage configuration within the programmable range. The family shares common topology and interface characteristics while differing in fixed or programmable output settings.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Publicly confirmed equivalent substitutes include FAN53555BUC79X and FAN53555UC01X. These parts offer parameter equivalence but may differ in specific output voltage ranges or packaging details. Validate compatibility with existing circuit designs before substitution.