The BF6108 uses adaptive constant off-time peak current control topology to regulate the output voltage. In moderate to heavy load condition, the BF6108 works in the pulse width modulation (PWM) mode. In light load condition, the device has two operation modes selected by the MODE pin. One is the pulse frequency modulation (PFM) mode to improve the efficiency and another one is the forced PWM mode to avoid application problems caused by low switching frequency. The switching frequency in the PWM mode is adjustable ranging from 200 kHz to 2.2 MHz by an external resistor. The BF6108 also implements a programmable soft-start function and an adjustable switching peak current limit function. In addition, the device provides 15.2-V output overvoltage protection, cycle-by-cycle over current protection, and thermal shutdown protection.

The BF6108 is available in a 4.50-mm × 3.50-mm 20-pin VQFN package.

 

>Input Voltage Range: 2.7 to 14 V

>Output Voltage Range: 4.5 to 14.6 V

>12-A Switch Current

>Up to 92% Efficiency at VIN = 3.6 V, VOUT = 9V, and IOUT = 3 A

>Mode Selection Between PFM Mode and Forced PWM Mode at Light Load

>1.0 µA Current into VIN Pin during Shutdown

>Resistor-Programmable Switch Peak Current Limit

>Adjustable Switching Frequency: 200 kHz to 2.2 MHz

>Programmable Soft Start

>Output Overvoltage Protection at 15.2 V

>Cycle-by-Cycle Over current Protection

>Thermal Shutdown

>GPIO for external PMOS control

>4.50-mm × 3.50-mm 20-Pin VQFN Package