FAN53741UC108X

The FAN53741 is a 2.5 MHz step−down switching voltage regulator, 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 FAN53741 is capable of delivering a peak efficiency of 97% and can support a max load of 1300 mA. The regulator operates at a nominal fixed frequency of 2.5 MHz, which reduces the value of the external components achieving a total solution size of 5.24 mm². At moderate and light load, Pulse Frequency Modulation (PFM) is used to operate the device with a low quiescent current of 60 μA. Even with such a low quiescent current, the part exhibits excellent transient response during load swings. At higher loads, the system automatically switches to fixed−frequency control, operating at 2.5 MHz. In Shutdown Mode, the supply current drops below 0.5 μA, reducing power consumption. The FAN53741 is available in 6−bump, 0.4 mm pitch, Wafer−Level Chip−Scale Package (WLCSP).

Applications

• Smart Phones
• Wearables
• Smart Watch
• Health Monitoring
• Sensor Drive
• Energy Harvesting
• Utility and Safety Modules
• RF Modules

Key features

• 60 μA Typical Quiescent Current
• 5.24 mm² Total Solution Size
• 1300 mA Output Current Capability
• Programmable Output Voltage 0.6 V to 3.3 V in 25 mV Steps via I²C Functionality
• Programmable Current Limit 530 mA to 2150 mA in 108 mA Steps via I²C Functionality
• 2.3 V to 5.5 V Input Voltage Range
• 2.5 MHz Fixed−Frequency Operation
• Best−in−Class Load Transient Response
• Internal Soft−Start Limits Battery Current Below 150 mA to avoid Brown−out Scenarios
• Protection Faults (UVLO, OCP and TSP)
• Thermal Shutdown and Overload Protection
• 6−Bump WLCSP, 0.4 mm Pitch
• This is a Pb−Free Device