UC3525AN

The UC3525AN is designed as a monolithic integrated circuit that included all of the control circuit necessary for a pulse width modulating regulator. There are a voltage reference, an error amplifier, a pulse width modulator, an oscillator, under-voltage lockout, soft start circuit, and output drivers in the chip.

UC3525AN has five features. (1)5V±1% reference. (2)Oscillator sync terminal. (3)Internal soft start. (4)Deadtime control. (5)Under-voltage lockout. Those are all the main features.

Some absolute maximum ratings of UC3525AN have been concluded into several points as follow. (1)Its supply voltage would be 40V. (2)Its collector supply voltage would be 40V. (3)Its output current sink or source would be 500mA. (4)Its reference output current would be 50mA. (5)Its oscillator charging current would be 5mA. (6)Its power dissipation would be 1000mW. (7)Its operating temperature range would be from 0°C to 70°C. (8)Its storage temperature range would be from -65°C to 150°C. (9)Its lead temperature soldering 10 seconds would be 300°C. It should be noted that stresses above those listed in absolute maximum ratings may cause permanent damage to device.

Also some electrical characteristics of UC3525AN are concluded as follow. (1)Its reference output voltage would be min 5.0V and typ 5.1V and max 5.2V. (2)Its line regulation would be typ 9mV and max 20mV. (3)Its load regulation would be typ 20mV and max 50mV. (4)Its short circuit output current would be typ 80mA and max 100mA. (5)Its total output variation would be min 4.95V and max 5.25V. (6)Its temperature stability would be typ 20mV and max 50mV. (7)Its long term stability would be typ 20mV and max 50mV. (8)Its initial accuracy would be typ 3% and max 6%. (9)Its frequency change with voltage would be typ 0.8% and max 2%. (10)Its maximum frequency would be min 400KHz and typ 430KHz and would be typ 60Hz and max 120Hz. And so on. If you have any question or suggestion or want to know more information please contact us for details. Thank you!