The BF6108A is a high power density, fully integrated synchronous boost converter with an 11-mΩ power switch and a

13-mΩ rectifier switch to provide a high efficiency and small size solution in portable systems. The BF6108A has wide

input voltage range from 2.7 V to 14 V to support applications with single cell or two cell Lithium batteries and more.

The device has 12-A switch current capability and is capable of providing an output voltage up to 18.5 V.

The BF6108A uses adaptive constant off-time peak current control topology to regulate the output voltage. In moderate to heavy

load condition, the BF6108A 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 BF6108A also implements a programmable soft-start function

and an adjustable switching peak current limit function. In addition, the device provides 19-V output overvoltage protection, cycle-by-cycle

over current protection, and thermal shutdown protection.

The BF6108A is available in a 4.50-mm × 3.50-mm 20-pin VQFN package. 

Features

• Input Voltage Range: 2.7 to 14 V
• Output Voltage Range: 4.5 to 18.5 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 19 V
• Cycle-by-Cycle Over current Protection
• Thermal Shutdown
• GPIO for external PMOS control
• 4.50-mm × 3.50-mm 20-Pin VQFN Package

Applications

• Bluetooth Audio
• E-Cigarette
• Quick Charge Power Bank
• Portable POS terminal
• Thunderbolt Interface