The UC1525AJ is an Ask PWM Controller manufactured by Texas Instruments. It is a 4.5V to 35V, 51kHz, Monolithic, Step-Up/Down, Pulse Width Modulation Controller. It is specifically designed to control a Boost or Buck Converter and is equipped with a range of features including pulse frequency modulation/pulse width modulation, current sense output for over-current protection and power-up/down prevention. It has an adjustable sawtooth oscillator, adjustable dead time, over temperature protection, and it is customizable with external voltage dividers. This part offers superior accuracy, fast transient response and high noise immunity.