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NCP1580
Low Voltage Synchronous Buck Controller
NCP1580
Low Voltage Synchronous
Buck Controller
The NCP1580 is a voltage mode PWM controller designed to
operate from a 5.0 V or 12 V supply and produce an output voltage as
low as 0.8 V. This 8−pin device provides an optimal level of
integration to reduce size and cost of the power supply. The NCP1580
has a fixed 350 kHz oscillator and soft−start function. The NCP1580
provides a 1.5 A floating gate driver design to drive N−Channel
MOSFETs in a synchronous configuration. Adaptive non−overlap
circuitry reduces switching losses by preventing simultaneous
conduction of both outputs. Protection features include thermal
shutdown and undervoltage lockout (UVLO). The NCP1580 is
available in an 8−pin SOIC package.
Features Input V oltage Range from 4.5 V to 13.2 V 350 kHz Internal Oscillator Boost Pin Operates to 26.5 V Voltage Mode PWM Control 0.8 V �1.5% Internal Reference Voltage Adjustable Output Voltage Internal Soft−Start Internal 1.5 A Gate Drivers Adaptive Non−Overlap Circuit 90% Max Duty Cycle Input UVLO Overtemperature Protection Fully Specified over −40°C to 85°C Pb−Free Package is Available
Applications Graphics Cards Desktop Computers Servers/Networking DSP and FPGA Power Supply DC−DC Regulator Modules
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