资 源 简 介
NCP1587, NCP1587A Low Voltage Synchronous Buck ControllerThe NCP1587 and NCP1587A are low cost PWM controllersdesigned to operate from a 5 V or 12 V supply. These devices arecapable of producing an output voltage as low as 0.8 V. These 8−pindevices provide an opTImal level of integraTIon to reduce size and costof the power supply. The NCP1587/A provide a 1 A gate driver designand an internally set 275 kHz (NCP1587) and 200 kHz (NCP1587A)oscillator. In addiTIon to the 1 A gate drive capability, other efficiencyenhancing features of the gate driver include adapTIve non−overlapcircuitry. The devices also incorporate an externally compensatederror amplifier and a capacitor programmable soft−start function.Protection features include programmable short circuit protection andunder voltage lockout (UVLO). The NCP1587/A comes in an 8−pinSOIC package.Features• Input Voltage Range from 4.5 to 13.2 V• 275 kHz (NCP1587) and 200 kHz (NCP1587A) Internal Oscillator• Boost Pin Operates to 30 V• Voltage Mode PWM Control• 0.8 V ±1.0 % Internal Reference Voltage• Adjustable Output Voltage• Capacitor Programmable Soft−Start• Internal 1 A Gate Drivers• 80% Max Duty Cycle• Input Under Voltage Lockout• Programmable Current Limit• This is a Pb−Free DeviceApplications• Graphics Cards• Desktop Computers• Servers / Networking• DSP & FPGA Power Supply• DC−DC Regulator Modules
