100V Synchronous PWMBuck ControllerDescriptionThe NCP1034 is a high voltage PWM controller designed for highperformance synchronous Buck DC/DC applications with inputvoltages up to 100 V. The NCP1034 drives a pair of externalN−MOSFETs. The switching frequency is programmable from25 kHz up to 500 kHz allowing the flexibility to tune for efficiencyand size. A synchronization feature allows the switching frequency tobe set by an external source or output a synchronization signal tomultiple NCP1034 controllers. The output voltage can be preciselyregulated using the internally trimmed 1.25 V reference voltage forlow voltage applications. Protection features include userprogrammable undervoltage lockout and hiccup current limit.Features• High Voltage Operating up to 100 V• Programmable Switching Frequency up to 500 kHz• 2 A Output Drive Capability• Precision Reference Voltage (1.25 V)• Programmable Soft−Start with Prebiased Load Capability• Programmable Overcurrent Protection• Programmable Undervoltage Protection• Hiccup Current Limit Using MOSFET RDS(on) Sensing• External Frequency Synchronization• 16 Pin SOIC Package• This is a Pb−Free DeviceApplications• 48 V Non−Isolated DC−DC Converter• Embedded Telecom Systems• Networking and Computing Voltage Regulator• Distributed Point of Load Power Architectures• General High Voltage DC−DC Converters