Description

FA7703/04 are the PWM type DC-DC converter control ICs with 2ch output that can directly drive power MOSFETs. FA7703/04 feature CMOS devices with high breakdown voltage and also low power consumption are achieved. By means of their small and thin package (1.1mm max.), and high frequency operation (to 1MHz), FA7703/04 are completely suitable for the use of very small DC-DC converters. Besides, you can select a Pch or Nch type of MOSFET directly driven by FA7703/04, and also you can practically design any kind of DC-DC converter circuit like a boost converter, a buck converter, a inverting converter, a fly-back converter, and so on.

2. Features

• Wide range of supply voltage

  FA7703 : VCC=2.5 to 30V FA7704 : VCC=2.5 to 20V

• Direct driving of MOSFET

• Switching Pch/Nch driving is available (channel 1 only)

• Low current consumption is achieved by CMOS process: 1.8mA (typ.) in operation

• 2ch PWM control IC

• High frequency operation is available: 50kHz to 1MHz

• Simple setting of operation frequency with a timing resistor

• Soft start setting is available

• Setting of the limitation of maximum output duty cycle is available in each channel

• Built-in protection function for undervoltage lockout

• Highly accurate reference voltage:

  VREF: 1.00V±1%, VB: 1.00V±2%, VREG: 2.20V±2%

• Built-in output timer latched short-circuit protection circuit

• Thin and small package: TSSOP-16, SOP-16