UNISONIC TECHNOLOGIES CO.
, LTD
U3525
LINEAR INTEGRATED CIRCUIT
REGULATING PWM IC
DESCRIPTION
The UTC U3525 is a pulse width modulator IC and designed for switching power supplies application to improve performance and reduce external parts usage.
A shutdown terminal controls both the soft-start circuitry and the output stages, providing instantaneous turn off through the PWM latch with pulsed shutdown, as well as soft-start recycle with longer shutdown commands.
The output stage features NOR logic, giving a LOW output for an OFF state.
An under-
voltage lockout circuitry, which keeps the outputs off and the soft-start capacitor discharged for sub-normal input
voltages, includes approxim...