NCP1587, NCP1587A Low Voltage Synchronous Buck Controller
The NCP1587 and NCP1587A are low cost PWM controllers
designed to operate from a 5 V or 12 V supply. These devices are
capable of producing an output voltage as low as 0.8 V. These 8?pin
devices provide an optimal level of integration to reduce size and cost
of the power supply. The NCP1587/A provide a 1 A gate driver design
and an internally set 275 kHz (NCP1587) and 200 kHz (NCP1587A)
oscillator. In addition to the 1 A gate drive capability, other efficiency
enhancing features of the gate driver include adaptive non?overlap
circuitry. The devices also incorporate an externally compensated
error amplifier and a capacitor programmable soft?start function.
Protection features include programmable short circuit protection and
under voltage lockout (UVLO). The NCP1587/A comes in an 8?pin
SOIC 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 Device
Applications
? Graphics Cards
? Desktop Computers
? Servers / Networking
? DSP & FPGA Power Supply
? DC?DC Regulator Modules