NCP1575

www.DataSheet4U.com NCP1575 Low Voltage Synchronous Buck Controller with Adjustable Switching Frequency The NCP1575 is a low voltage buck controller. It provides the control for a DC−DC power solution producing an output voltage as low as 0.980 V over a wide current range. It contains all required circuitry for a synchronous NFET buck regulator using the V2t control method to achieve the fastest possible transient response and best overall regulation. The NCP1575 operates at a default switching frequency of 200 kHz, but switching frequency is user−programmable with an additional resistor between ROSC and ground. This device provides undervoltage lockout protection, soft−start, and built−in adaptive nonoverlap and is assembled in an SOIC−8 package. The NCP1575−based solution requires a bias supply of 12 V, and it can convert from a bulk power supply ranging from 2 V to 12 V. Conversion from bulk supplies greater than 7 V is best accomplished by using an external doubler circuit to raise the enhancement voltage for the external NFET switches. Features http://onsemi.com MARKING DIAGRAM 8 8 1 SOIC−8 D SUFFIX CASE 751 1 1575 ALYW A L Y W = Assembly Location = Wafer Lot = Year = Work Week Pb−Free Packages are Available 0.980 V ±1.0% Reference Voltage V2 Control Topology 200 ns Transient Response Programmable Soft−Start 40 ns Gate Rise and Fall Times (3.3 nF Load) Adaptive FET Nonoverlap Time Default 200 kHz Oscillator Frequency (No External Resistor...