Description

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 A. 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 A, reducing power consumption.

The FAN53741 is available in 6−bump, 0.4 mm pitch, Wafer−Level

Chip−Scale Package (WLCSP).

Features

• 60 A 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

Applications

• Smart Phones

• Wearables

• Smart Watch

• Health Monitoring

• Sensor Drive

• Energy Harvesting

• Utility and Safety Modules

• RF Modules