2A , 18V, 350KHz
Synchronous Step-Down Converter GENERAL DESCRIPTION
The PT1203 is a monolithic pulse-width-modulated (PWM) synchronous step-down switch mode regulator with two internal power MOSFETs. It achieves 2A continuous output current over a wide input supply range with excellent load and line regulation. Current mode operation provides fast transient response and eases loop stabilization. Fault condition protection includes cycle-by-cycle current limit and thermal shutdown.
The PT1203 requires a minimum number of external components, available in SOP-8 and ESOP-8 package.
FEATURES
l 2A Output Current
l 0.13Ω Internal Power MOSFET Switch
l Stable with Low ESR Output Ceramic Capacitors
l Up to 93% Efficiency
l Fixed 350KHz Frequency
l Thermal Shutdown
l Cycle-by-Cycle Over Current Protection
l Wide 4.75V to 18V Operating Input Range
l Output Adjustable from 0.923V to 15V
l Available in 8-Pin SOP8 and ESOP8 Packages
APPLICATION
l 2A Output Current l 0.13Ω Internal Power MOSFET Switch l Stable with Low ESR Output Ceramic Capacitors l Up to 93% Efficiency l Fixed 350KHz Frequency l Thermal Shutdown l Cycle-by-Cycle Over Current Protection l Wide 4.75V to 18V Operating Input Range l Output Adjustable from 0.923V to 15V l Available in 8-Pin SOP8 and ESOP8 Packages
l PC Monitors l LCD TV l Distributed Power Systems l Network Systems l FPGA, DSP, ASIC Power Supplies l Notebook Computers TYPICAL APPLICATION CIRCUIT dzsc/18/2007/18200738.JPG
FP6188-2A,340Khz,SOP-8同步降压IC,完全替代MP1482(MPS)及RT8284(Richtek) FP6188-2A,23V,340kHz,同步整流降压IC,与MP1482是PIN-TO-PIN。 FP6188特点如下描述: 1、FP6188输出电容可以只使用陶瓷电容,整个电路只需要一个输入电解电容。 2、FP6188待机电流1mA(MP1482:1.3mA典型值),关断电流1uA。 3、FP6188效率比较高:93%,内部导通电阻只有130毫欧。 4、FP6188具有使能端,可以进行关断,同时具有过电流保护。 5、FP6188外围电路相对简单,只需使用10uH的电感,相对体积小。 6、FP6188在低负载时,效率比较高,功耗比较低。优于MP1482。 7、FP6188耐压可以到23V,MP1482耐压只有18V。 8、FP6188和MP1482两个IC反馈电压一样,都是Vfb=0.923V。 9、FP6188和MP1482封装均为SOP [返回]
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