FAN53526UC00X

Voltage Regulators - DC DC Switching Regulators Overview

The FAN53526UC00X is a digitally programmable TinyBuck synchronous step-down switching regulator manufactured by onsemi (formerly Fairchild). It operates with an input voltage range of 2.5 V to 5.5 V and delivers up to 3 A continuous output current. The device features a fixed nominal switching frequency of 2.4 MHz, which minimizes external component requirements. Output voltage is digitally programmable via an I2C interface, ranging from 600 mV to 1.39375 V in 6.25 mV steps. It utilizes Pulse Frequency Modulation (PFM) for high efficiency at light loads, achieving a typical quiescent current of 50 uA. The regulator includes protection features such as thermal shutdown and overcurrent protection, housed in a compact 15-ball WLCSP package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Digitally programmable output voltage via I2C interface with flexible slew rate control
• Synchronous buck topology with proprietary architecture for high efficiency across load ranges
• Automatic transition between PFM mode for light loads and fixed-frequency PWM for heavy loads
• Integrated protection mechanisms including thermal shutdown and overload protection

Voltage Regulators - DC DC Switching Regulators Applications

• ARM, Tegra, OMAP, NovaThor, ARMADA, and Krait processors
• LPDDR3 and LPDDR4 memory systems
• Smartphones and tablets
• Laptops and ultra-portable mobile PCs
• Game devices and DSP processors

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix code against the manufacturer's official documentation to confirm exact electrical parameters and pinout configuration. Confirm availability status as some variants may be subject to end-of-life notices or production changes. Ensure compatibility with required I2C clock speeds and input voltage ranges for the target application design.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a small form factor is critical due to its WLCSP packaging. Choose this regulator for applications requiring precise digital voltage adjustment rather than fixed resistor networks. Consider the 2.4 MHz switching frequency for balancing EMI and passive component size. Verify that the system load profile aligns with the PFM-to-PWM transition characteristics for optimal efficiency.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the TinyBuck family of synchronous step-down converters designed for space-constrained portable electronics. It replaces older analog-programmable regulators by offering digital flexibility through I2C. The series is characterized by high power density and efficient light-load performance, targeting battery-powered mobile computing platforms where power management efficiency directly impacts runtime.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Check for direct cross-reference part numbers within the same TinyBuck family or updated revisions from onsemi. Verify if alternative packages are available if board space constraints change. Ensure any substitute maintains the same I2C addressability and voltage programming resolution.