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采用标准SOP-8(Exposed Pad)封装，充分考虑大电流负载的散热问题。将IC所产生的热量从芯片内部传导至引线框架，并通过底部的散热片到达PCB板铜面提高散热性能极大的保证了芯片大电流状态下的稳定性。
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：
1.网络通讯设备
2.LCDTV 液晶显示器
3.上网本 MID
4.机顶盒，消费类数码终端
5.RFID无线识别终端
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