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FS2462是泛海微自主开发的5A降压型同步整流芯片，是国内首家大电流同步5A芯片，内部集成极低RDS内阻20豪欧金属氧化物半导体场效应晶体管的(MOSFET)。输入工作电压宽至4.75V到21V，输出电压1.0V可调至20V。5A的连续负载电流输出可保证系统各状态下稳定运行。其效率高达95%，满足各系统日益增强的节能和持久工作的求。内部振荡频率500KHz ,以保证对系统其它部分的EMI干扰最小。该芯片还具有软启动和逐周期过流保护、短路保护及过温保护功能。 FS2462 is a high-efficiency synchronous step-down DC/DC converter that employs a special process technique to obtain very low RDS(ON) for the internal metal–oxide–semiconductor field-effect transistor (MOSFET). The input operation voltage is in a wide 4.75V to 21V, and continuous load current capability is 5A. Control circuit is designed by a particular current mode which provides fast transient response and eases loop stabilization. This product has a very low standby current less than 1μA in shutdown mode. When the SHDN/S pin voltage is less than 0.4V, FS2462 will turn off. Fault protection includes over current protection (OCP), under voltage lockout protection (UVLO) and over temperature protection (OTP) function. This high-efficiency current mode step-down “Green Power Converter” offers the standard SOP-8 package with an exposed pad. Features ● High Efficiency up to 90% ● Internal MOSFET RDS(ON): 110mΩ/20mΩ ● Internal Compensation ● Input Operation Voltage Range: 4.75V to 21V ● 5A Continuous Output Current ● Output Voltage down to 0.805V ● 500KHz Oscillation Frequency ● Sync to External Clock from 300 KHz to 800 KHz ● Cycle-by-Cycle Current Limit ● Under Voltage Lockout ● Over-Temperature Protection with Auto Recovery ● <1μA Shutdown Current ● Thermal Enhanced SOP-8 (Exposed Pad) Package ● RoHS Compliant Applications ● Networking equipment ● OLPC, Netbook ● Distributed power system ● LCD monitor, TV, STB ● External HDD ● Security System 应用领域： FS2462输入5-18V输出输出5V5A3.3V5A2.5V5A1.8V5A1.2V5A降压恒压芯片电路图
FS2462输入18-21V输出5V5A3.3V5A2.5V5A1.8V5A1.2V5A降压芯片电路图
FS2462电气参数
FS2462曲线图
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