NCP1501

NCP1501 Dual Mode PWM/Linear Buck Converter The NCP1501 is a dual mode regulator that operates either as a PWM Buck Converter or as a Low Drop Out Linear Regulator. If a synchronization signal is present, the NCP1501 operates as a current mode PWM converter with synchronous rectification. The synchronization signal allows the user to control the location of the spurious frequency noise generated by a PWM converter. Linear mode is active when a synchronization signal is not present. The NCP1501 configuration allows an efficient high power operation and low noise during system sleep modes. Features  Synchronous Rectification for Higher Efficiency in PWM Mode  Linear Mode Operation for Low Noise Output at Low Loads  Integrated MOSFETs and Feedback Circuits  Cycle--by--Cycle Peak Current Limit of 800 mA (typ)  Automatic Switching Between PWM and Linear Mode  Operating Frequency Range of 500 to 1000 kHz  Optimized for Ceramic Capacitors and Low Profile Inductors  Thermal Limit Protection  Built--in Slope Compensation for Current Mode PWM Converter  Fixed Output Voltages of 1.05 V, 1.35 V, 1.57 V, 1.8 V  Shutdown Current Consumption of 0.2 mA  Internal Soft Start  Transistor Count: 3500  Pb--Free Package is Available Typical Applications  Cellular Phones  PDAs  Pagers  Supplies for DSP Cores  Portable Applications Vout 10 m L 10 mH COUT 1 SHD CB0 8 2 SYN CB1 7 3 VO GND 6 4 LX Vin 5 NCP1501 Vbat 10 m CIN http://onsemi.com 8 1 MARKING DIAGRAM Micro8 ...