at 800khz allowing the use of small external components while still being able to have   low output voltage ripple. with ovp function the ic can stand off input voltage as high as 42v. the ps5401   supports 600ma continuous output current and it has a 0.8v nominal feedback voltage.   additional features include: thermal shutdown vin undervoltage lockout and gatedrive undervoltage lockout. the   ps5401  is available in a low-profile sot23-6 package.ps5401 ：

部n 沟道mosfet 。built in charge pump drives external n-channel mosfet 9679 快速响应：在电流反转时，响应时间仅为50ns 。fast response: when the current reverses the response time is only 50ns. 9679 2a 峰值栅极关断电流。2a peak gateturn off current. 9679 最小vds 钳位，实现更快的关断速度。minimum vds clamp for faster shutdown speed. 9679 封装类型：sot-6 （薄型sot-23-6 ）。packaging type: sot-6 thin sot-23-6 . 三应用领域9679 冗余电源（n 1

htn5157 是一颗异步电流模式dcdc 升压控制器，支持宽工作电压范围（2.8v-45v ）应用。htn5157 内置栅极驱动器，通过gate管脚驱动外置nmos 。htn5157 通过rt 管脚外接电阻调整开关频率，开关频率范围为100khz-1000khz 。htn5157 通过cs 管脚外接电阻调整电感峰值电流。htn5157 采用峰值电流模式控制和外置补偿网络，更简单

        the fks4004 is the high cell density trenched n-ch mosfets which provide excellent rdson and gatecharge for most of the synchronous buck converter applications.         the fks4004 meet the rohs and green product requirement 100 eas guaranteed with full function reliability approved. symbol parameter rating units vds drain-source voltage 40 v vgs gate-source voltage 177 20 v id ta 25 8451 continuous drain current vgs 10v1 10 a id ta 70 8451 continuous drain current vgs 10v1 8 a idm pulsed drain current2 34 a eas single pulse avalanche energy3 31 mj ias avalanche current 25 a pd ta 25 8451 total power dissipation4 1.5 w tstg storage temperature range -55

锂电池升压12v2a ，3.0v 升压12v ，3.0v 升压12v2a ，3.0v ～4.2v 锂电池升压12v2a ，fp5208      the fp5208 fp5208a and fp5208b are boost topology switching regulator for wide operating  voltage applications. they provide built-in gatedriver pin for driving external n-mosfet. the  non-inverting input of error amplifier connects to a 0.6v precision reference voltage. they have  programmable soft start time set by external capacitors. fp5208 and fp5208b have programmable  frequency set by external resistors. fp5208a and fp5208b have programmable current detection and  over current protection set by external resistors.         the fp5208a and fp5208b are available in the small footprint dfn-12l package