Pinout
DescriptionThe XC9161A335PR is one member of the XC9216 series.It is consists of a reference voltage source,ramp wave circuit,error amplifier,PWM comparator,phase compensation circuit,output voltage adjustment resistors,P-channel MOSFET driver transistor,N-channel MOSFET switching transistor for the synchronous switch, current limiter circuit,U.V.L.O. circuit and others.The series ICs compare,using the error amplifier,the voltage of the internal voltage reference source with the feedback voltage from the VOUT pin through split resistors,R1 and R2.Phase compensation is performed on the resulting error amplifier output,to input a signal to the PWM comparator to determine the turn-on time during PWM operation. The PWM comparator compares,in terms of voltage level,the signal from the error amplifier with the ramp wave from the ramp wave circuit,and delivers the resulting output to the buffer driver circuit to cause the Lx pin to output a switching duty cycle.This process is continuously performed to ensure stable output voltage.
Features of the XC9161A335PR are:(1)synchronous step-down DC/DC;(2)high efficiency:92%;(3)low ripple rejection:10 mV;(4)output current:500 mA;(5)oscillation frequency:600 kHz,1.2MHz;(6)PWM fixed control:(XC9215 series);(7)maximum duty ratio:100%;(8)ceramic capacitor compatible;(9)ultra small package:SOT-25,USP-6B.The XC9161A335PR can be used in mobile phones (such as PDC, GSM, CDMA, IMT200 etc.),bluetooth equipment,PDAs,portable communication modem,portable games,cameras,digital cameras and cordless phones,notebook computers.
The absolute maximum ratings of the XC9161A335PR can be summarized as:(1)VIN pin voltage:-0.3 to 6.5 V ;(2)Lx pin voltage:-0.3 to VIN+0.3 V;(3)VOUT pin voltage:-0.3 to 6.5 V ;(4)CE/MODE pin voltage:-0.3 to VIN+0.3 V;(5)Lx pin current:+/-1000 mA;(6)operating temperature range:-40 to +85;(7)storage temperature range:-55 to +125.If you want to know more information such as the electrical characteristics about the XC9161A335PR,please download the datasheet in www.seekic.com .
XC9161A335PR Data Sheet
