FAN53600 Series

3 MHz, 600 mA / 1A Synchronous Buck Regulator

Catalog

3 MHz, 600 mA / 1A Synchronous Buck Regulator

Part	Operating Temperature [Max]	Operating Temperature [Min]	Voltage - Input (Max) [Max]	Package / Case	Topology	Synchronous Rectifier	Output Configuration	Current - Output	Supplier Device Package [x]	Supplier Device Package	Supplier Device Package [y]	Frequency - Switching	Mounting Type	Output Type	Number of Outputs	Voltage - Output (Min/Fixed)	Voltage - Input (Min) [Min]	Function
ON Semiconductor FAN53600AUC33X	85 °C	-40 °C	5.5 V	6-UFBGA WLCSP	Buck		Positive	600 mA	1.23	6-WLCSP	0.88	3 MHz	Surface Mount	1.81 mOhm	1	3.3 V	2.3 V	Step-Down
ON Semiconductor FAN53600AUC28X	85 °C	-40 °C	5.5 V	6-UFBGA WLCSP	Buck		Positive	600 mA	1.23	6-WLCSP	0.88	3 MHz	Surface Mount	1.81 mOhm	1	2.8 V	2.3 V	Step-Down

Catalog

3 MHz, 600 mA / 1A Synchronous Buck Regulator

Key Features

• 600 mA or 1 A Output Current Capability

• 26 µA Typical Quiescent Current

• 3 MHz Fixed-Frequency Operation

• Best-in-Class Load Transient Response

• Best-in-Class Efficiency

• 2.3 V to 5.5 V Input Voltage Range

• 0.8 V to 3.3 V Fixed Output Voltage

• Low Ripple Light-Load PFM Mode

• Forced PWM and External Clock Synchronization

• Internal Soft-Start

• Input Under-Voltage Lockout (UVLO)

• Thermal Shutdown and Overload Protection

• Optional Output Discharge

• 6-Bump WLCSP, 0.4 mm Pitch

Description

The FAN53600/10 is a 3 MHz step-down switching voltage regulator, available in 600 mA or 1 A options, that delivers a fixed output from an input voltage supply of 2.3 V to 5.5 V. Using a proprietary architecture with synchronous rectification, the FAN53600/10 is capable of delivering a peak efficiency of 92%, while maintaining efficiency over 80% at load currents as low as 1 mA.The regulator operates at a nominal fixed frequency of 3 MHz, which reduces the value of the external components to as low as 1 µH for the output inductor and 4.7 µF for the output capacitor. In addition, the Pulse-Width Modulation (PWM) modulator can be synchronized to an external frequency source.At moderate and light loads, Pulse Frequency Modulation (PFM) is used to operate the device in Power-Save Mode with a typical quiescent current of 26 µA. Even with such a low quiescent current, the part exhibits excellent transient response during large load swings. At higher loads, the system automatically switches to fixed-frequency control, operating at 3 MHz. In Shutdown Mode, the supply current drops below 1 µA, reducing power consumption. For applications that require minimum ripple or fixed frequency, PFM Mode can be disabled using the MODE pin.The FAN53600/10 is available in 6-bump, 0.4 mm pitch, Wafer-Level Chip-Scale Package (WLCSP).