The accuracy of the chip +5.1V reference  voltage is 1%. Because the reference voltage is within  the input common- mode range of the error  amplifier, there is no need for an external resistor.  3525 can work in master- slave mode and can also  be synchronized with external clock. The dead time  can be adjusted by the resistance between CT and  discharge terminal. Other functional circuits inside  the chip also include: soft start circuit, turn- off circuit  and under- voltage circuit.