rectifier when connected in series with a power supply. the controller provides gate drive for the external n-channel mosfet through a built-in charge pump and uses a fast response comparator to quickly turn off the mosfet when current flows in reverse. ps5050-1/- q1 can be connected to a power supply ranging from 5v to 75v and can withstand transient voltages upto 100vps5050 ：

low output ripple voltage for noise sensitive applications.switching frequency is internally set at 1.2mhz allowing the use of small surface mount inductors and capacitors.low output voltages are easily supported with the 0.6v feedback reference voltage.the ps3240  is offered in a low profile 1mm 5-pin thin sot package and is available in an adjustable version.     features 8226 high efficiency: upto 96 8226 2.5v to 5.5v input voltage range 8226 1.2mhz constant frequency operation 8226 no schottky diode required 8226 low dropout operation: 100 duty cycle 8226 pfm mode for high efficiency in light load.ps3240 ：

this regulator highly power efficient. the internal compensation network also minimizes external component counts to only 6. an internal 0.6v voltage is connected to error amplifier the non-inverting input as precision reference voltage. built-in soft-start function can reduce the inrush current. features 特点：current mode with pwm/psm control input voltage range: 2.4v 4.5v adjustable output upto 5.3v shutdown current: < 1ua oscillator frequency: 500khz reference voltage: 0.6v /-2 disconnect load during shutdown cycle-by-cycle current limit low rds on : 30m 937 for both high and low side protection: otp ocp scp internal compensation internal soft-start: 7ms package: sop-8l ep applications 应用：

damage in the event of an output overload. the        pl2628   is available in a small   6-pin sot-23  package.       特性：8226 integrated 80m 937 power mosfet 8226 2v to 24v input voltage 8226 1.2mhz fixed switching frequency 8226 internal 4a switch current limit 8226 adjustable output voltage 8226 internal compensation 8226 upto 28v output voltage 8226 automatic pulse frequency modulation mode at light loads 8226 upto 97 efficiency 8226 available in a 6-pin sot23-6 package b628 b628 升压ic pl2628ic 丝印：b628

ic （fp5510 ）日益显得重要，成为业界开始关注的焦点。  10-bit dac 120ma vcm driver  with i2c interface  （fp5510 ）the fp5510 is a single 10-bit dac with 120maoutput current voice coil motor vcm driver with an  i2c-compatible serial interface that operates at clock  rates upto 400khz. its supply operates from 2.3v to  3.6v. the fp5510 incorporates with a power-on reset  circuit power-down function. power-on reset circuit  ensure when supply power updac output is to 0v  until valid write bit value takes place. in power down  mode the supply current is about 1 956 a. the fp5510 is designed for auto focus operation 

电感的锂电池升压ic ，输出电压4.94v ，输出电流最大可以做到230ma 。比较适合用在小功率的电子产品中。fixed 4.94v 177 3 output   vin range: 2.7v to 4.5v    output current: upto 110ma vin 8805 3v   upto 230ma vin 8805 3.6v     low noise constant frequency 360khz   operation  shutdown current < 1 956 a  no inductors   available in low profile 6-lead sot23  package 无电感升压ic