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XC9502 Datasheet(PDF) 1 Page - Torex Semiconductor |
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XC9502 Datasheet(HTML) 1 Page - Torex Semiconductor |
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1 / 40 page  Mar, 14 2003 Ver. 2 ! Applications " 2ch DC/DC Controller (Step-up + Step-down) # PDAs " Input Voltage Range 0.9V ~ 10.0V # Palm Top Computers " Output Voltage Externally Set-Up # Portable Audio Systems " Switching Frequency 180kHz (±15%) # Various Multi-Function Power Supplies " Maximum Duty Cycle Step-up 80% (Typ.) Step-down 100% " PWM, PWM/PFM Switching Control ! Features " High Efficiency Step-up 85% (Typ.) 2ch DC/DC Controller Step-down 92% (Typ.) Output 1 : Step-up DC/DC Controller " Small MSOP-10 package Output 2 : Step-down DC/DC Controller Power Supply Voltage Range : 2.0V ~ 10V Output Voltage Range Output 1 (Step-up) : 1.5V ~ 30.0V ! General Description Output 2 (Step-down) : 0.9V ~ 6.0V Oscillation Frequency : 180kHz ±15% (300kHz, 500kHz custom) Output Current Output 1 Output 2 Stand-By Function : 3.0 µA (MAX.) Package : MSOP-10 Soft-Start Time : 10 ms (internally set) ! Typical Performance Characteristics ! Typical Application Circuit XC9502B092A Input : 2 cell, VOUT 1 : 3.3V, VOUT2 : 1.8V : more than 1000mA (VIN=3.3V, VOUT=1.8V) : more than 300mA (VIN=1.8V, VOUT=3.3V) Noise is easily reduced with PWM control since the frequency is fixed. The series gives freedom of control selection so that control suited to the application can be selected. Soft-start time is internally set to 10msec (Output 1) and offers protection against in-rush currents when the power is switched. This also prevents voltage overshoot. Can be set freely with 0.9V ( ±2.0%) of reference voltage supply and external components. Can be set freely with 0.9V ( ±2.0%) of reference voltage supply and external components. XC9502 Series 2ch. Step-up / down DC/DC Controller ICs The XC9502 series are PWM controlled, PWM/PFM automatic switching controlled, multi-functional, 2 channel step-up and down DC/DC controller ICs. With 0.9V of standard voltage supply internal, and using externally connected components, the output 1 voltage (step-up DC/DC controller) can be set freely within a range of 1.5V to 30V. Since the output 2 (step- down DC/DC controller) has a built-in 0.9V reference voltage (accuracy ±2%), 0.9V to 6.0V can be set using external components. With a 180kHz frequency, the size of the external components can be reduced. Switching frequencies of 300kHz & 500kHz are also available as custom-designed products. The control of the XC9502 series can be switched between PWM control and PWM/PFM automatic switching control using external signals. Control switches from PWM to PFM during light loads when automatic switching is selected and the series is highly efficient from light loads through to large output currents. Tr2:Nch MOSFET :XP161A1355P L1:22 µH CDRH5D28 Tr2:Pch MOSFET XP162A12A6P CIN :47 µF VIN =2.0V ~3.0V SD2 :MA2Q737 SD1 :MA2Q737 RFB11 :200k Ω CFB1 :62pF RFB12 :75k Ω VOUT1:3.3V 1 EXT1 2 VDD 3 FB1 FB2 8 GND 9 EXT2/ 10 4 PW M1 PW M2 7 5 EN1 EN2 6 CL1 :47 µFX2 CL2 :47 µFX2 VPWM1 VPWM2 VNE2 VNE1 L2:22 µH CDRH5D28 VOUT2:1.8V RFB21 :220k Ω RFB22 :220k Ω CFB2 :62pF 0 10 20 30 40 50 60 70 80 90 100 0.1 1 10 100 1000 Output Current 1,2 IOUT1,2 (mA) VIN=2.7V VOUT2:1.8V PWM Control PWM/PFM Switching Control L1=15 µH,L2=22µH(CDRH5D28),CL1,CL2=92µF(Tantalum) SD1,SD2:CMS02, Tr1:XP161A1355P,Tr2:XP162A12A6P XC9502B093A (300kHz,VOUT1:3.3V,VOUT2:1.8V) VOUT1:3.3V 1 |
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