XC9503 Series 2ch. Step-down DC/DC Controller ICs Mar. 14, 2003 Ver. 2 Applications z PDAs z Palm Top Computers z Digital Cameras z Various Multi-Function Power Supplies 2ch DC/DC Controller (Step-down + Step-down) Input Voltage Range 2.0V ~ 10.0V Output Voltage Externally Set-Up Switching Frequency 300kHz (±15%) Maximum Duty Cycle 100% PWM, PWM/PFM Switching Control High Efficiency Step-down 92% (Typ.) Small MSOP-10 package Features Input Voltage Range : 2.0V ~ 10V Power Supply Voltage Range : 2.0V ~ 10V Output Voltage Range : 0.9V ~ 6.0V Can be set freely with 0.9V (±2.0%) of reference voltage supply and external components. General Description The XC9503 series are PWM controlled, PWM/PFM automatic switching controlled, multi-functional, 2 channel step-down DC/DC controller ICs. Since the series has a built-in 0.9V reference voltage (accuracy ±2%), 0.9V to 6.0V can be set using external components. With a 300kHz frequency, the size of the external components can be reduced. Switching frequencies of 180kHz & 500kHz are also available as customdesigned products. The control of the XC9503 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. Oscillation Frequency ±15% : 300kHz (180kHz, 500kHz custom) Output Current Stand-By Function Package Soft-Start Time : more than 1000mA (VIN=5.0V, VOUT=3.3V) : 3.0µA (MAX.) : MSOP-10 : 10 ms (internally set) Typical Performance Characteristics XC9503B093A (300kHz,VOUT1:3.3V) L1=22µH(CDRH5D28), CL1=47µF(Tantalum) SD1:MA2Q737, Tr1:XP162A1355P Noise is easily reduced with PWM control since the frequency is fixed. The series gives freedom to select control suited to the application. Soft-start time is internally set to 10msec and offers protection against in-rush currents when the power is switched on and also protects against voltage overshoot. 100 PWM/PFM Switching Efficiency 1 EFFI1 (%) 90 80 70 VIN=5.0V 60 50 40 30 20 10 PWM 0 0.1 Typical Application Circuit 1 10 100 Output Current 1 IOUT1(mA) 1000 XC9503B093A Input : VOUT1 : 3.3V, VOUT2 : 1.8V VOUT1:3.3V L1:22µH CDRH5D28 Tr2:Pch MOSFET XP162A12A6P Tr1:Pch MOSFET XP162A12A6P SD1 :MA2Q737 RFB11 :200kΩ VIN =5.0V VOUT2:1.8V SD2 :MA2Q737 CIN :47µF CFB1 :62pF CFB2 :62pF 1 EXT1/ CL1: 47µFX2 2 VDD 3 FB1 VPWM1 RFB12 :75kΩ L2:22µH CDRH5D28 VEN1 RFB21 :220kΩ EXT2/ 10 CL2: 47µFX2 GND 9 FB2 8 4 PWM1 5 EN1 PWM2 7 EN2 6 1 VPWM2 VEN2 RFB22 :220kΩ XC9503 Series 2ch. Step-down DC/DC Controller ICs Pin Configuration 1 EXT1 EXT2 10 2 VDD GND 9 3 FB1 FB2 8 4 PWM1 PWM2 7 5 EN1 EN2 6 MSOP-10 (TOP VIEW) Pin Assignment PIN NUMBER PIN NAME FUNCTIONS 1 EXT 1 2 VDD Supply Voltage 3 FB1 Channel 1 : Output Voltage Monitor Feedback Pin <Threshold value : 0.9V. Output voltage can be set freely by connecting split resistors between VOUT1 and Ground.> 4 PWM1 Channel 1 : PWM/PFM Switching Pin <Control Output 1. PWM control when connected to VDD, PWM / PFM auto switching when connected to Ground. > 5 EN1 Channel 1 : Enable Pin <Connected to Ground when Output 1 is in stand-by mode. Connected to VDD when Output 1 is active. EXT1 is high when in stand-by mode.> 6 EN2 Channel 2 : Enable Pin <Connected to Ground when Output 2 is in stand-by mode. Connected to VDD when Output 2 is active. EXT2/ is high when in stand-by mode.> 7 PWM2 Channel 2 : PWM/PFM Switching Pin <Control Output 2. PWM control when connected to VDD, PWM / PFM auto switching when connected to Ground.> 8 FB2 Channel 2 : Output Voltage Monitor Feedback Pin <Threshold value : 0.9V. Output voltage can be set freely by connecting split resistors between VOUT2 and Ground.> 9 GND Ground 10 EXT 2 Channel 2 : External Transistor Drive Pin <Connected to Pch Power MOSFET Gate> Channel 1: External Transistor Drive Pin <Connected to Pch Power MOSFET Gate> Ordering Information XC9503123456 DESIGNATOR SYMBOL 1 2 3 B Standard (10 Pin) 0 9 FB Voltage 4 2 3 5 A R 5 6 L DESCRIPTION 0.9V Switching Frequency 180kHz (custom) 300kHz 500kHz (custom) Package Embossed Tape MSOP-10 Standard Feed Reverse Feed 2 XC9503 Series 2ch. Step-down DC/DC Controller ICs Block Diagram PWM/PFM Controller 1 EXT1 PWM/PFM Controller 2 PWM Comparator2 PWM Comparator1 VDD + FB1 - - EXT2 GND + + FB2 + - - Error Amp1 Ramp Wave Generator 1 Ramp Wave Error Amp2 Generator 2 PWM1 PWM2 OSC Generator Vref1 = 0.9V with Soft Start1, EN1 EN1 to internal circuit EN1 EN2 to internal circuit Vref2 = 0.9V with Soft Start 1, EN2 EN2 Absolute Maximum Ratings Ta=25OC PARAMETER SYMBOL RATINGS UNITS VDD Pin Voltage VDD - 0.3 ~ 12 V FB1, 2 Pin Voltage VFB - 0.3 ~ 12 V EN1, 2 Pin Voltage VEN - 0.3 ~ 12 V PWM1,2 Pin Voltage VPWM - 0.3 ~ 12 V EXT1, 2 Pin Voltage VEXT - 0.3 ~ VDD + 0.3 V EXT1, 2 Pin Current IEXT ±100 mA Power Dissipation Pd 150 mW Operating Ambient Temperature Topr - 40 ~ + 85 Storage Temperature O C O C - 55 ~ +125 * Voltage goes to Ground. Tstg 3 XC9503 Series Electrical Characteristics 2ch. Step-down DC/DC Controller ICs XC9503B092A Ta=25OC Common Characteristics PARAMETER SYMBOL Supply Voltage Max. Input Voltage Output Voltage Range (note 1) VDD VIN VOUTSET CONDITIONS VIN ≥ 2.0V, IOUT1, 2=1mA VOUT1 VOUT2 FB1, 2=0V EN1=3.0V, EN2=0V, FB1=0V Supply Current 1-1 IDD1-1 EN2=3.0V, EN1=0V, FB2=0V FB1=0V, FB2=1.0V Supply Current 1-2 IDD1-2 FB1=1.0V, FB2=0V Supply Current 2 IDD2 FB1, 2=1.0V Stand-by Current ISTB Same as IDD1, EN1=EN2=0V Switching Frequency FOSC Same as IDD1 EN1,2 "High" Voltage VENH FB1,2=0V EN1,2 "Low" Voltage VENL FB1,2=0V EN1,2 "High" Current IENH EN1,2=3.0V EN1,2 "Low" Current IENL EN1,2=0V, FB1,2=3.0V PWM1,2 "High" Current IPWMH FB1, 2=3.0V, PWM=3.0V PWM1,2 "Low" Current IPWML FB1, 2=3.0V, PWM=0V FB1,2 "High" Current IFBH FB1, 2=3.0V FB1,2 "Low" Current VFBL FB1, 2=1.0V Unless otherwise stated, VDD=3.0V, PWM1,2=3.0V, EN1, 2 =3.0V Supply Current 1 IDD1 Output 1 Characteristics TYP. MAX. UNITS 2.0 10.0 0.9 0.9 - 60 10.0 10.0 10.0 120 V V V V µA 1 1 - 50 110 µA 2 - 60 130 µA 2 153 0.65 - 60 140 1.0 180 - 3.0 207 0.20 0.50 -0.50 0.50 -0.50 0.50 -0.50 µA µA kHz V V µA µA µA µA µA µA 2 2 2 2 2 2 2 2 2 2 2 MIN. TYP. MAX. UNITS TEST CIRCUIT 0.882 100 22 0.900 30 0.918 2.0 0 38 V V % % % 3 1 2 2 4 - 92 - % 4 20.0 47 30 0.20 mS Ω Ω V V 4 5 5 4 4 1 2 Step-down Controller PARAMETER SYMBOL FB1 Voltage Minimum Operation Voltage Maximum Duty Ratio 1 Minimum Duty Ratio1 PFM Duty Ratio 1 VFB1 VINmin1 MAXDTY1 MINDTY1 PFMDTY1 Efficiency1 (note 2) EFFI1 CONDITIONS VIN=3.0V, IOUT1=10mA Same as IDD1 Same as IDD2 No Load, VPWM1=0V IOUT1=250mA P-ch MOSFET : XP162A12A6P VOUT1 × 0.95V, EN1=0V→0.65V Soft-Start Time1 TSS1 10.0 5.0 EXT1 "High" ON Resistance REXTBH1 EN1=0, EXT1=VDD-0.4V 28 22 EXT1 "Low" ON Resistance REXTBL1 FB2=0V, EXT1=0.4V PWM1 "High" Voltage VPWMH1 No Load 0.65 PWM1 "Low" Voltage VPWML1 No Load Unless otherwise stated, VDD=EN1=PWM1=3.0V, PWM2=EN2=GND, EXT2=OPEN, FB2=OPEN, VIN=5.0V Output 2 Characteristics Step-down Controller PARAMETER SYMBOL FB2 Voltage Minimum Operation Voltage Maximum Duty Ratio 2 Minimum Duty Ratio 2 PFM Duty Ratio 2 VFB2 VINmin2 MAXDTY2 MINDTY2 PFMDTY2 Efficiency2 (note 2) EFFI2 CONDITIONS VIN=3.0V, IOUT2=10mA Same as IDD1 Same as IDD2 No Load, VPWM2=0V IOUT2=250mA P-ch MOSFET : XP162A12A6P VOUT2 × 0.95V, EN2=0V→0.65V MIN. TYP. MAX. UNITS TEST CIRCUIT 0.882 100 22 0.900 30 0.918 2.0 0 38 V V % % % 6 1 2 2 7 - 92 - % 7 20.0 47 30 0.20 mS Ω Ω V V 7 5 5 7 7 10.0 5.0 TSS2 Soft-Start Time 2 EXT2 "High" ON Resistance REXTBH2 EN2=0, EXT2=VDD-0.4V 28 EXT2 "Low" ON Resistance REXTBL2 FB2=0V, EXT2=0.4V 22 VPWMH2 No Load 0.65 PWM2 "High" Voltage PWM2 "Low" Voltage VPWML2 No Load Unless otherwise stated, VDD=EN2=PWM2=3.0V, PWM1=EN1=GND, EXT1=OPEN, FB1=OPEN, VIN=5.0V Notes TEST CIRCUIT MIN. 1) Please be careful not to exceed the breakdown voltage level of the peripheral parts. 2) EFFI={ [ (Output voltage) x (Output current) ] / [ (Input voltage) x (Input Current) ] } x 100 4 XC9503 Series Electrical Characteristics 2ch. Step-down DC/DC Controller ICs XC9503B093A Ta=25OC Common Characteristics PARAMETER SYMBOL Supply Voltage Max. Input Voltage Output Voltage Range (note 1) VDD VIN VOUTSET CONDITIONS VIN ≥ 2.0V, IOUT1, 2=1mA VOUT1 VOUT2 FB1, 2=0V EN1=3.0V, EN2=0V, FB1=0V Supply Current 1-1 IDD1-1 EN2=3.0V, EN1=0V, FB2=0V FB1=0V, FB2=1.0V Supply Current 1-2 IDD1-2 FB1=1.0V, FB2=0V Supply Current 2 IDD2 FB1, 2=1.0V Stand-by Current ISTB Same as IDD1, EN1=EN2=0V Switching Frequency FOSC Same as IDD1 EN1,2 "High" Voltage VENH FB1,2=0V EN1,2 "Low" Voltage VENL FB1,2=0V EN1,2 "High" Current IENH EN1,2=3.0V EN1,2 "Low" Current IENL EN1,2=0V, FB1,2=3.0V PWM1,2 "High" Current IPWMH FB1, 2=3.0V, PWM=3.0V PWM1,2 "Low" Current IPWML FB1, 2=3.0V, PWM=0V FB1,2 "High" Current IFBH FB1, 2=3.0V FB1,2 "Low" Current VFBL FB1, 2=1.0V Unless otherwise stated, VDD=3.0V, PWM1,2=3.0V, EN1, 2 =3.0V Supply Current 1 IDD1 Output 1 Characteristics TYP. MAX. UNITS 2.0 10.0 0.9 0.9 - 70 10.0 10.0 10.0 140 V V V V µA 1 1 - 60 120 µA 2 - 70 150 µA 2 255 0.65 - 80 150 1.0 300 - 3.0 345 0.20 0.50 -0.50 0.50 -0.50 0.50 -0.50 µA µA kHz V V µA µA µA µA µA µA 2 2 2 2 2 2 2 2 2 2 2 MIN. TYP. MAX. UNITS TEST CIRCUIT 0.882 100 22 0.900 30 0.918 2.0 0 38 V V % % % 3 1 2 2 4 - 92 - % 4 20.0 47 30 0.20 mS Ω Ω V V 4 5 5 4 4 1 2 Step-down Controller PARAMETER SYMBOL FB1 Voltage Minimum Operation Voltage Maximum Duty Ratio 1 Minimum Duty Ratio1 PFM Duty Ratio 1 VFB1 VINmin1 MAXDTY1 MINDTY1 PFMDTY1 Efficiency1 (note 2) EFFI1 CONDITIONS VIN=3.0V, IOUT1=10mA Same as IDD1 Same as IDD2 No Load, VPWM1=0V IOUT1=250mA P-ch MOSFET : XP162A12A6P VOUT1 × 0.95V, EN1=0V→0.65V Soft-Start Time1 TSS1 5.0 10.0 EXT1 "High" ON Resistance REXTBH1 EN1=0, EXT1=VDD-0.4V 28 EXT1 "Low" ON Resistance REXTBL1 FB2=0V, EXT1=0.4V 22 PWM1 "High" Voltage VPWMH1 No Load 0.65 PWM1 "Low" Voltage VPWML1 No Load Unless otherwise stated, VDD=EN1=PWM1=3.0V, PWM2=EN2=GND, EXT2=OPEN, FB2=OPEN, VIN=5.0V Output 2 Characteristics Step-down Controller PARAMETER SYMBOL FB2 Voltage Minimum Operation Voltage Maximum Duty Ratio 2 Minimum Duty Ratio 2 PFM Duty Ratio 2 VFB2 VINmin2 MAXDTY2 MINDTY2 PFMDTY2 Efficiency2 (note 2) EFFI2 CONDITIONS VIN=3.0V, IOUT2=10mA Same as IDD1 Same as IDD2 No Load, VPWM2=0V IOUT2=250mA P-ch MOSFET : XP162A12A6P VOUT2 × 0.95V, EN2=0V→0.65V MIN. TYP. MAX. UNITS TEST CIRCUIT 0.882 100 22 0.900 30 0.918 2.0 0 38 V V % % % 6 1 2 2 7 - 92 - % 7 20.0 47 30 0.20 mS Ω Ω V V 7 5 5 7 7 Soft-Start Time 2 TSS2 5.0 10.0 EXT2 "High" ON Resistance REXTBH2 EN2=0, EXT2=VDD-0.4V 28 EXT2 "Low" ON Resistance REXTBL2 FB2=0V, EXT2=0.4V 22 PWM2 "High" Voltage VPWMH2 No Load 0.65 PWM2 "Low" Voltage VPWML2 No Load Unless otherwise stated, VDD=EN2=PWM2=3.0V, PWM1=EN1=GND, EXT1=OPEN, FB1=OPEN, VIN=5.0V Notes TEST CIRCUIT MIN. 1) Please be careful not to exceed the breakdown voltage level of the peripheral parts. 2) EFFI={ [ (Output voltage) x (Output current) ] / [ (Input voltage) x (Input Current) ] } x 100 5 XC9503 Series Electrical Characteristics 2ch. Step-down DC/DC Controller ICs XC9503B095A Ta=25OC Common Characteristics PARAMETER SYMBOL Supply Voltage Max. Input Voltage Output Voltage Range (note 1) VDD VIN Supply Current 1 Voutset CONDITIONS VIN ≥ 2.0V, IOUT1, 2=1mA VOUT1 VOUT2 IDD1 FB1, 2=0V EN1=3.0V, EN2=0V, FB1=0V Supply Current 1-1 IDD1-1 EN2=3.0V, EN1=0V, FB2=0V FB1=0V, FB2=1.0V Supply Current 1-2 IDD1-2 FB1=1.0V, FB2=0V Supply Current 2 IDD2 FB1, 2=1.0V Stand-by Current ISTB Same as IDD1, EN1=EN2=0V Switching Frequency FOSC Same as IDD1 EN1,2 "High" Voltage VENH FB1,2=0V EN1,2 "Low" Voltage VENL FB1,2=0V EN1,2 "High" Current IENH EN1,2=3.0V IENL EN1,2=0V, FB1,2=3.0V EN1,2 "Low" Current PWM1,2 "High" Current IPWMH FB1, 2=3.0V, PWM=3.0V PWM1,2 "Low" Current IPWML FB1, 2=3.0V, PWM=0V FB1,2 "High" Current IFBH FB1, 2=3.0V FB1,2 "Low" Current VFBL FB1, 2=1.0V Unless otherwise stated, VDD=3.0V, PWM1,2=3.0V, EN1, 2 =3.0V Output 1 Characteristics TYP. MAX. UNITS 2.0 10.0 0.9 0.9 - 90 10.0 10.0 10.0 170 V V V V µA 1 1 - 80 150 µA 2 - 100 180 µA 2 425 0.65 - 100 190 1.0 500 - 3.0 575 0.20 0.50 -0.50 0.50 -0.50 0.50 -0.50 µA µA kHz V V µA µA µA µA µA µA 2 2 2 2 2 2 2 2 2 2 2 MIN. TYP. MAX. UNITS TEST CIRCUIT 0.882 100 22 0.900 30 0.918 2.0 0 38 V V % % % 3 1 2 2 4 - 91 - % 4 20.0 47 30 0.20 mS Ω Ω V V 4 5 5 4 4 1 2 Step-down Controller PARAMETER SYMBOL FB1 Voltage Minimum Operation Voltage Maximum Duty Ratio 1 Minimum Duty Ratio1 PFM Duty Ratio 1 VFB1 VINmin1 MAXDTY1 MINDTY1 PFMDTY1 Efficiency1 (note 2) EFFI1 CONDITIONS VIN=3.0V, IOUT1=10mA Same as IDD1 Same as IDD2 No Load, VPWM1=0V IOUT1=250mA P-ch MOSFET : XP162A12A6P VOUT1 × 0.95V, EN1=0V→0.65V 10.0 Soft-Start Time1 TSS1 5.0 EXT1 "High" ON Resistance REXTBH1 EN1=0, EXT1=VDD-0.4V 28 EXT1 "Low" ON Resistance REXTBL1 FB2=0V, EXT1=0.4V 22 PWM1 "High" Voltage VPWMH1 No Load 0.65 PWM1 "Low" Voltage VPWML1 No Load Unless otherwise stated, VDD=EN1=PWM1=3.0V, PWM2=EN2=GND, EXT2=OPEN, FB2=OPEN, VIN=5.0V Output 2 Characteristics Step-down Controller PARAMETER SYMBOL FB2 Voltage Minimum Operation Voltage Maximum Duty Ratio 2 Minimum Duty Ratio 2 PFM Duty Ratio 2 VFB2 VINmin2 MAXDTY2 MINDTY2 PFMDTY2 Efficiency2 (note 2) EFFI2 CONDITIONS VIN=3.0V, IOUT2=10mA Same as IDD1 Same as IDD2 No Load, VPWM2=0V IOUT2=250mA P-ch MOSFET : XP162A12A6P VOUT2 × 0.95V, EN2=0V→0.65V MIN. TYP. MAX. UNITS TEST CIRCUIT 0.882 100 22 0.900 30 0.918 2.0 0 38 V V % % % 6 1 2 2 7 - 91 - % 7 20.0 47 30 0.20 mS Ω Ω V V 7 5 5 7 7 10.0 Soft-Start Time 2 TSS2 5.0 28 EXT2 "High" ON Resistance REXTBH2 EN2=0, EXT2=VDD-0.4V EXT2 "Low" ON Resistance REXTBL2 FB2=0V, EXT2=0.4V 22 PWM2 "High" Voltage VPWMH2 No Load 0.65 PWM2 "Low" Voltage VPWML2 No Load Unless otherwise stated, VDD=EN2=PWM2=3.0V, PWM1=EN1=GND, EXT1=OPEN, FB1=OPEN, VIN=5.0V Notes TEST CIRCUIT MIN. 1) Please be careful not to exceed the breakdown voltage level of the peripheral parts. 2) EFFI={ [ (Output voltage) x (Output current) ] / [ (Input voltage) x (Input Current) ] } x 100 6 XC9503 Series 2ch. Step-down DC/DC Controller ICs Operational Description The XC9503 series are multi-functional, 2 channel step-down DC/DC converter controller ICs with built-in high speed, low ON resistance drivers. <Error Amp 1, 2> The Error Amplifier is designed to monitor the output voltage and it compares the feedback voltage (FB) with the reference voltage. In response to feedback of a voltage lower than the reference voltage, the output voltage of the error amp. decreases. <OSC Generator> This circuit generates the Switching Frequency which in turn generates the reference clock. <Ramp Wave Generator 1, 2> The Ramp Wave Generator generates a saw-tooth waveform based on outputs from the Phase Shift Generator. <PWM Comparator 1, 2> The PWM Comparator compares outputs from the Error Amp. and saw-tooth waveform. When the voltage from the Error Amp's output is low, the external switch will be set to ON. <PWM/PFM Controller 1, 2> This circuit generates PFM pulses. Control can be switched between PWM control and PWM/PFM automatic switching control using external signals. The PWM/PFM automatic switching mode is selected when the voltage of the PWM1 (2) pin is less than 0.2V, and the control switches between PWM and PFM automatically depending on the load. As the PFM circuit generates pulses based on outputs from the PWM comparator, shifting between modes occurs smoothly. PWM control mode is selected when the voltage of the PWM1 (2) pin is more than 0.65V. Noise is easily reduced with PWM control since the switching frequency is fixed. Control suited to the application can easily be selected which is useful in audio applications, for example, where traditionally, efficiencies have been sacrificed during stand-by as a result of using PWM control (due to the noise problems associated with the PFM mode in stand-by). <Vref with Soft Start 1, 2> The reference voltage, Vref (FB pin voltage)=0.9V, is adjusted and fixed by laser trimming (for output voltage settings, please refer to page 8). To protect against inrush current, when the power is switched on, and also to protect against voltage overshoot, soft-start time is set internally to 10ms. It should be noted, however, that this circuit does not protect the load capacitor (CL) from inrush current. With the Vref voltage limited and depending upon the input to the error amps, the operation maintains a balance between the two inputs of the error amps and controls the EXT pin's ON time so that it doesn't increase more than is necessary. <Chip Enable Function> This function controls the operation and shutdown of the IC. When the voltage of the EN1 or EN2 pins is 0.2V or less, the mode will be chip disable, the channel's operations will stop and the EXT pins will be kept at a highlevel (the external P-type MOSFET will be OFF). When both EN1 and EN2 are in a state of chip disable, current consumption will be no more than 3.0 µA. When the EN1 or EN2 pin's voltage is 0.65V or more, the mode will be chip enable and operations will recommence. With softstart, 95% of the set output voltage will be reached within 10mS (TYP) from the moment of chip enable. 7 XC9503 Series 2ch. Step-down DC/DC Controller ICs <Setting of Output Voltage> Output voltage can be set by adding external split resistors. Output voltage is determined by the following equation, based on the values of RFB11(RFB21) and RFB12(RFB22). The sum of RFB11(RFB21) and RFB12(RFB22) should normally be 1 M Ω or VOUT=0.9 × (RFB11+RFB12) /RFB12 The value of CFB1(CFB2), speed-up capacitor for phase compensation, should be fzfb= 1 / (2 × π × CFB1 × RFB11) which is equal to 12kHz. Adjustments are required from 1kHz to 50kHz depending on the application, value of inductance (L), and value of load capacity (CL). [Example of Calculation] When RFB11=200kΩ and RFB12=75kΩ, VOUT1=0.9 × (200k+75k) / 75k=3.3V. [Typical Example] RFB11 RFB12 RFB11 VOUT CFB1 VOUT (V) (pF) (V) (kΩ) (kΩ) (kΩ) 1.0 1.5 1.8 2.0 2.2 30 220 220 330 390 270 330 220 270 270 2.5 2.7 3.0 3.3 5.0 430 62 62 39 33 The same method can be adopted for channel two also. [External Components] Tr : * MOSFET XP162A12A6P (TOREX P-Channel Power MOSFET) Note : VGS Breakdown Voltage of this Tr. is 12V so please be careful with the power supply voltage. SD : MA2Q737 (Schottky , MATSUSHITA) CMS02 (Schottky, TOSHIBA) 10µH (SUMIDA, CDRH5D28, FOSC = 500kHz) 22µH (SUMIDA, CDRH5D28, FOSC = 300kHz) 22µH (SUMIDA, CDRH5D28, FOSC = 180kHz) 16V, 47µF (Tantalum) Increase capacity according to the equation below when the step-up voltage ratio is large and output current is high. L: CL : C=(CL standard value)×(IOUT (mA)/500mA×VOUT/VIN Tr : RB : CB : * PNP MOSFET 2SA1213 (SANYO) 500Ω ( Adjust in accordance with load & Tr.'s HFE.) Set according to the equation below. RB ≤ (VIN-0.7) x hFE / IC-REXTBH 2200pF (Ceramic) Set according to the equation below. CB ≤ (2 π x RB x FOSC x 0.7) The same components can be adopted for both channel 1 and channel 2. 8 390 360 560 200 82 RFB12 (kΩ) CFB1 (pF) 220 180 240 75 18 33 33 24 62 160 XC9503 Series 2ch. Step-down DC/DC Controller ICs Test Circuits Circuit 1 Circuit 5 PNP Tr1 L1 VOUT1 PNP Tr2 N 1 EXT1 L2 V OUT2 5 10Ω C IN 2 200pF 5 10Ω 22 00p F VI RFB21 SBD1 GND 9 SBD2 GND 9 3 FB1 FB2 8 4 PWM1 3 FB1 FB2 8 CL2 RL2 4 PWM1 VEXT1 1µ F VPWM1 VDD PWM2 7 5 EN1 VPWM2 EN2 6 VEXT2 PWM2 7 RFB12 RFB22 5 EN1 A CFB2 1µF CL1 RL1 2 VDD EXT2 10 2 VDD A RFB11 CFB1 1 EXT1 CIN EXT2 10 VFB1 EN2 6 VEN2 VEN1 VFB2 Circuit 6 Circuit 2 Pch MOSFET2 1 EXT1 A 2 VDD GND 9 3 FB1 FB2 8 4 PWM1 A A 5 EN1 A V IN PWM2 7 EN2 6 A A OSC A 1 EXT1 EXT2 10 2 VDD GND 9 3 FB1 1µ F 4 PWM1 VFB1 VDD VPWM1 VOUT2 A OSC A L2 EXT2 10 VEN1 VEN2 VPWM2 VFB2 5 EN1 Circuit 3 SBD2 V FB2 8 CL2 RL PWM2 7 EN2 6 Circuit 7 L1 VOUT1 Pch MOSFET2 Pch MOSFET1 A 1 EXT1 EXT2 10 SBD1 VIN GND 9 3 FB1 FB2 8 A SBD2 VIN 1 EXT1 EXT2 10 200kΩ CIN 2 VDD VOUT2 A CIN A L2 2 VDD GND 9 62 pF V V CL1 3 FB1 RL 4 PWM1 5 EN1 4 PWM1 PWM2 7 L1 Pch MOSFET1 A A 200kΩ CL1 1 EXT1 62pF V SBD1 EXT2 10 VIN CIN 2 VDD GND 9 3 FB1 FB2 8 RL 75kΩ 4 PWM1 5 EN1 CL2 75kΩ 5 EN1 EN2 6 Circuit 4 VOUT1 FB2 8 PWM2 7 PWM2 7 EN2 6 9 EN2 6 RL XC9503 Series 2ch. Step-down DC/DC Controller ICs Peripheral Components Used for Test Circuits Circuit 1 L1, L2 : SD1, SD2 : CL1, CL2 : CIN : PNP Tr1, 2: RFB : CFB : 22µH (SUMIDA CDRH5D28) : XC9503B092A 15µH (SUMIDA CDRH5D28) : XC9503B093A 10µH (SUMIDA CDRH5D28) : XC9503B095A CRS02 (Schottky diode, TOSHIBA) EC10QS06 (Schottky diode, NIHON INTER) 16MCE476MD2 (Tantalum, NIHON CHEMICON) 16MCE476MD2 (Tantalum, NIHON CHEMICON) 2SA1213 (TOSHIBA) Please use by the conditions as below. RFB11 + RFB12 ≤ 1MΩ RFB21 + RFB22 ≤ 1MΩ RFB11 / RFB12 = (Setting Output Voltage / 0.9) -1 VOUT2=(0.9-VOUT1) X (RFB21/RFB22) + 0.9V Please adjust as below: fzfb=1/(2 x π x CFB1 x RFB11) = 1kHz ~50kHz ( 12kHz usual) fzfb=1/(2 x π x CFB2 x RFB21) = 1kHz ~50kHz ( 12kHz usual) Circuits 3 L1 : SD1 : CL1 : CIN : P-ch MOSFET1 : 22µH (SUMIDA CDRH5D28) MA2Q737 (Schottky diode, MATSUSHITA) 16MCE476MD2 (Tantalum, NIHON CHEMICON) 16MCE476MD2 (Tantalum, NIHON CHEMICON) XP161A12A6P (TOREX) Circuits 4 L1 : SD1 : CL1 : CIN : P-ch MOSFET1 : 22µH (SUMIDA CDRH5D28) : XC9503B092A 15µH (SUMIDA CDRH5D28) : XC9503B093A 10µH (SUMIDA CDRH5D28) : XC9503B095A MA2Q737 (Schottky, MATSUSHITA) 16MCE476MD2 (Tantalum, NIHON CHEMICON) 16MCE476MD2 (Tantalum, NIHON CHEMICON) XP161A12A6P (TOREX) Circuit 6 L1 : SD1 : CL1 : CIN : P-ch MOSFET2 : 22µH (SUMIDA CDRH5D28) MA2Q737 (Schottky diode, MATSUSHITA) 16MCE476MD2 (Tantalum, NIHON CHEMICON) 16MCE476MD2 (Tantalum, NIHON CHEMICON) XP162A12A6P (TOREX) Circuit 7 L2 : SD2 : CL2 : CIN : P-ch MOSFET2 : 22µH (SUMIDA CDRH5D28) : XC9503B092A 15µH (SUMIDA CDRH5D28) : XC9503B093A 10µH (SUMIDA CDRH5D28) : XC9503B095A MA2Q737 (Schottky, MATSUSHITA) 16MCE476MD2 (Tantalum, NIHON CHEMICON) 16MCE476MD2 (Tantalum, NIHON CHEMICON) XP161A12A6P (TOREX) 10 XC9503 Series 2ch. Step-down DC/DC Controller ICs Notes on Use 1. Checking for Intermittent Oscillation The XC9503 series is subject to intermittent oscillation in the proximity of the maximum duty if the step-down ratio is low (e.g., from 4.2 V to 3.3 V) or a heavy load is applied where the duty ratio becomes high. Check waveforms at EXT under your operating conditions. A remedy for this problem is to raise the inductance of coil L or increase the load capacitance CL. 2. PWM/PFM Automatic Switching If PWM/PFM automatic switching control is selected and the step-down ratio is high (e.g., from 10 V to 1.0 V), the control mode remains in PFM setting over the whole load range, since the duty ratio under continuous-duty condition is smaller than the PFM duty ratio of the XC9503 series. The output voltage's ripple voltage becomes substantially high under heavy load conditions, with the XC9503 series appearing to be producing an abnormal oscillation. If this operation becomes a concern, set pins PWM1 and PWM2 to High to set the control mode to PWM setting. For use under the above-mentioned condition, measured data of PWM/PFM automatic switching control shown on the data sheets are available up to IOUT = 100 mA. 3. Ratings Use the XC9503 series and peripheral components within the limits of their ratings. 11 XC9503 Series 2ch. Step-down DC/DC Controller ICs Typical Performance Characteristics (1) Output Voltage vs. Output Current FOSC=300kHz, VOUT1, 2=1.0V FOCS=300kHz, VOUT1, 2=1.0V L=22µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P L=22µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 1.2 PWM Control Output Voltage1, 2 VOUT1, 2 (V) Output Voltage1, 2 VOUT1, 2 (V) 1.2 1.1 1.0 0.9 VIN=2.7V 3.3V 4.2V 5.0V 6.0V 8.0V 10V 0.8 0.7 PWM/PFM Switching Control 1.1 1.0 0.9 1 10 100 0.8 1000 0.1 1 10 100 Output Current1, 2 IOUT1, 2 (mA) Output Current1, 2 IOUT1, 2 (mA) FOSC=300kHz, VOUT1, 2=1.8V FOSC=300kHz, VOUT1, 2=1.8V L=22µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 2.0 Output Voltage1, 2 VOUT1, 2 (V) PWM/PFM Switching Control 1.9 1.8 1.7 VIN= 2.7V 3.3V 4.2V 5.0V 6.0V 8.0V 10V 1.6 1000 L=22µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 2.0 PWM Control Output Voltage1, 2 VOUT1, 2 (V) 4.2V, 6.0V 8.0V 10.0V 0.7 0.1 1.5 1.9 6.0V 8.0V 10.0V 1.8 1.7 VIN= 2.7V 3.3V 4.2V 5.0V 1.6 1.5 0.1 1 10 100 1000 0.1 1 10 100 Output Current1, 2 IOUT1, 2 (mA) Output Current1, 2 IOUT1, 2 (mA) FOSC=300kHz, VOUT1, 2=2.5V FOSC=300kHz, VOUT1, 2=2.5V L=22µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 2.7 Output Voltage1, 2 VOUT1, 2 (V) PWM/PFM Switching Control 2.6 10.0V 2.5 2.4 VIN= 2.7V 3.3V 4.2V 5.0V 6.0V 8.0V 2.3 1000 L=22µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 2.7 PWM Control Output Voltage1, 2 VOUT1, 2 (V) VIN=2.7V 3.3V 5.0V 2.2 10.0V 2.6 8.0V 2.5 2.4 3.3V 4.2V 5.0V 6.0V 2.3 VIN=2.7V 2.2 0.1 1 10 100 1000 0.1 Output Current1, 2 IOUT1, 2 (mA) 1 10 100 Output Current1, 2 IOUT1, 2 (mA) * When setting VOUT1, 2 =1.0V, VIN=8.0V, 10.0V, CL should be 94µF (Tantalum) + 100µF (OS-COM) 12 1000 XC9503 Series 2ch. Step-down DC/DC Controller ICs (1) Output Voltage vs. Output Current (continued) FOSC=300kHz, VOUT1, 2=3.3V FOSC=300kHz, VOUT1, 2=3.3V L=22µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 3.5 3.5 PWM/PFM Switching Control Output Voltage1, 2 VOUT1, 2 (V) Output Voltage1, 2 VOUT1, 2 (V) PWM Control VIN=4.2V 5.0V 6.0V 8.0V 3.4 L=22µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 3.3 10.0V 3.2 3.1 3.0 3.4 VIN=4.2V 5.0V 6.0V 8.0V 3.3 3.2 10.0V 3.1 3.0 0.1 1 10 100 1000 0.1 FOSC=300kHz, VOUT1, 2=5.0V 1000 L=22µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 5.2 PWM/PFM Switching Control Output Voltage1, 2 VOUT1, 2 (V) Output Voltage1, 2 VOUT1, 2 (V) 100 FOSC=300kHz, VOUT1, 2=5.0V PWM Control 10.0V 5.1 5.0 VIN= 6.0V 8.0V 4.9 4.8 4.7 10.0V 5.1 5.0 VIN= 6.0V 8.0V 4.9 4.8 4.7 0.1 1 10 100 1000 0.1 1 10 100 Output Current1, 2 IOUT1, 2 (mA) Output Current1, 2 IOUT1, 2 (mA) FOSC=180kHz, VOUT1, 2=1.0V FOSC=180kHz, VOUT1, 2=1.0V L=47µH(CDRH6D38), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 1.2 Output Voltage1, 2 VOUT1, 2 (V) PWM/PFM Switching Control 1.1 10.0V 1.0 0.9 1000 L=47µH(CDRH6D38), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 1.2 PWM Control Output Voltage1, 2 VOUT1, 2 (V) 10 Output Current1, 2 IOUT1, 2 (mA) L=22µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 5.2 1 Output Current1, 2 IOUT1, 2 (mA) VIN=2.7V 3.3V 4.2V 5.0V 6.0V 8.0V 0.8 1.1 10.0V 1.0 0.9 4.2V 5.0V 6.0V 8.0V VIN=2.7V 3.0V 0.8 0.7 0.7 0.1 0.1 1 10 100 1000 1 10 100 Output Current1, 2 IOUT1, 2 (mA) Output Current1, 2 IOUT1, 2 (mA) * When setting VOUT1, 2 =1.0V, VIN=8.0V, 10.0V, CL should be 94µF (Tantalum) + 100µF (OS-COM) 13 1000 XC9503 Series 2ch. Step-down DC/DC Controller ICs (1) Output Voltage vs. Output Current (continued) FOSC=180kHz, VOUT1, 2=3.3V L=47µH(CDRH6D38), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 3.5 L=47µH(CDRH6D38), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 5.2 PWM/PFM Switching Control PWM Control Output Voltage1, 2 VOUT1, 2 (V) Output Voltage1, 2 VOUT1, 2 (V) FOSC=180kHz, VOUT1, 2=5.0V 3.4 3.3 3.2 VIN=4.2V 5.0V 6.0V 8.0V 10V 3.1 3.0 PWM/PFM Switching Control PWM Control 5.1 5.0 4.9 VIN= 6.0V 8.0V 10V 4.8 4.7 0.1 1 10 100 1000 0.1 Output Current1, 2 IOUT1, 2 (mA) FOSC=500kHz, VOUT1, 2=1.0V Output Voltage1, 2 VOUT1, 2 (V) Output Voltage1, 2 VOUT1, 2 (V) 1.1 1.0 VIN=2.7V 3.3V 4.2V 5.0V 6.0V 8.0V 10V 0.8 0.7 1000 PWM/PFM Switching Control VIN=2.7V 3.3V 4.2V 5.0V 1.1 1.0 0.9 6.0V 8.0V 10.0V 0.8 0.7 0.1 1 10 100 1000 0.1 1 10 100 Output Current1, 2 IOUT1, 2 (mA) Output Current1, 2 IOUT1, 2 (mA) FOSC=500kHz, VOUT1, 2=3.3V FOSC=500kHz, VOUT1, 2=3.3V L=10µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 3.5 PWM Control 3.4 3.3 VIN=4.2V 5.0V 6.0V 8.0V 10V 3.2 3.1 3.0 1000 L=10µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 3.5 Output Voltage1, 2 VOUT1, 2 (V) Output Voltage1, 2 VOUT1, 2 (V) 100 L=10µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 1.2 PWM Control 0.9 10 FOSC=500kHz, VOUT1, 2=1.0V L=10µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 1.2 1 Output Current1, 2 IOUT1, 2 (mA) PWM/PFM Switching Control 10.0V 3.4 3.3 VIN=4.2V 5.0V 6.0V 8.0V 3.2 3.1 3.0 0.1 1 10 100 1000 0.1 Output Current1, 2 IOUT1, 2 (mA) 1 10 100 Output Current1, 2 IOUT1, 2 (mA) * When setting VOUT1, 2 =1.0V, VIN=8.0V, 10.0V, CL should be 94µF (Tantalum) + 100µF (OS-COM) 14 1000 XC9503 Series 2ch. Step-down DC/DC Controller ICs (1) Output Voltage vs. Output Current (continued) FOSC=500kHz, VOUT1, 2=5.0V L=10µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P Output Voltage1, 2 VOUT1, 2 (V) 5.2 PWM/PFM Switching Control PWM Control 5.1 5.0 VIN= 6.0V 8.0V 10V 4.9 4.8 4.7 0.1 1 10 100 1000 Output Current1, 2 IOUT1, 2 (mA) 15 XC9503 Series 2ch. Step-down DC/DC Controller ICs (2) Efficiency vs. Output Current FOSC=300kHz, VOUT1, 2=1.0V L=22µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 100 PWM/PFM Switching Control PWM Control 80 60 4.2V 3.3V 40 VIN=2.7V 20 L=22µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 100 PWM/PFM Switching Control PWM Control Efficiency1, 2 EFFI1, 2 (%) Efficiency1, 2 EFFI1, 2 (%) FOSC=300kHz, VOUT1, 2=1.0V 10.0V 80 8.0V 6.0V 60 40 20 VIN=5.0V 0 0 0.1 1 10 100 1000 0.1 Output Current1, 2 IOUT1, 2 (mA) L=22µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P Efficiency1, 2 EFFI1, 2 (%) Efficiency1, 2 EFFI1, 2 (%) VIN= 2.7V 60 3.3V 4.2V 20 1000 80 10.0V 60 VIN=5.0V 8.0V 40 6.0V 20 0 0 0.1 1 10 100 0.1 1000 1 10 100 Output Current1, 2 IOUT1, 2 (mA) Output Current1, 2 IOUT1, 2 (mA) FOSC=300kHz, VOUT1, 2=2.5V FOSC=300kHz, VOUT1, 2=2.5V L=22µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 80 VIN=2.7V 60 3.3V 40 4.2V 20 PWM/PFM Switching Control PWM Control 1 10 100 PWM/PFM Switching Control PWM Control 80 10V 60 VIN=5.0V 40 8.0V 6.0V 20 0 0 0.1 1000 L=22µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 100 Efficiency1, 2 EFFI1, 2 (%) 100 Efficiency1, 2 EFFI1, 2 (%) 100 L=22µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 100 80 40 10 FOSC=300kHz, VOUT1, 2=1.8V FOSC=300kHz, VOUT1, 2=1.8V 100 1 Output Current1, 2 IOUT1, 2 (mA) 0.1 1000 1 10 100 Output Current1, 2 IOUT1, 2 (mA) Output Current1, 2 IOUT1, 2 (mA) * When setting VOUT1, 2 =1.0V, VIN=8.0V, 10.0V, CL should be 94µF (Tantalum) + 100µF (OS-COM) 16 1000 XC9503 Series 2ch. Step-down DC/DC Controller ICs (2) Efficiency vs. Output Current (continued) FOSC=300kHz, VOUT1, 2=3.3V L=22µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 100 80 10.0V 60 8.0V 40 6.0V VIN=4.2V 5.0V 20 0 1 10 100 1000 80 60 10.0V 40 8.0V 20 VIN=6.0V 0.1 1 10 100 1000 Output Current1, 2 IOUT1, 2 (mA) Output Current1, 2 IOUT1, 2 (mA) FOSC=180kHz, VOUT1, 2=1.0V FOSC=180kHz, VOUT1, 2=1.0V L=47µH(CDRH6D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P PWM/PFM Switching Control PWM Control VIN=5.0V 80 60 4.2V 40 3.3V VIN=2.7V 20 L=47µH(CDRH6D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 100 Efficiency1, 2 EFFI1, 2 (%) Efficiency1, 2 EFFI1, 2 (%) PWM/PFM Switching Control PWM Control 0 0.1 100 L=22µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 100 PWM/PFM Switching Control PWM Control Efficiency1, 2 EFFI1, 2 (%) Efficiency1, 2 EFFI1, 2 (%) FOSC=300kHz, VOUT1, 2=5.0V 80 8.0V 60 6.0V 40 10V 20 PWM/PFM Switching Control PWM Control 0 0 0.1 1 10 100 0.1 1000 1 10 100 1000 Output Current1, 2 IOUT1, 2 (mA) Output Current1, 2 IOUT1, 2 (mA) FOSC=180kHz, VOUT1, 2=3.3V FOSC=180kHz, VOUT1, 2=5.0V L=47µH(CDRH6D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 100 L=47µH(CDRH6D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 100 Efficiency1, 2 EFFI1, 2 (%) Efficiency1, 2 EFFI1, 2 (%) 5.0V 80 VIN=4.2V 10V 60 8.0V 6.0V 40 20 80 10V 60 8.0V VIN=6.0V 40 20 PWM/PFM Switching Control PWM Control PWM/PFM Switching Control PWM Control 0 0 0.1 1 10 100 1000 0.1 Output Current1, 2 IOUT1, 2 (mA) 1 10 100 Output Current1, 2 IOUT1, 2 (mA) * When setting VOUT1, 2 =1.0V, VIN=8.0V, 10.0V, CL should be 94µF (Tantalum) + 100µF (OS-COM) 17 1000 XC9503 Series 2ch. Step-down DC/DC Controller ICs (2) Efficiency vs. Output Current (continued) FOSC=500kHz, VOUT1, 2=1.0V PWM/PFM Switching Control PWM Control 80 60 4.2V 40 3.3V 20 L=10µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 100 Efficiency1, 2 EFFI1, 2 (%) Efficiency1, 2 EFFI1, 2 (%) 100 FOSC=500kHz, VOUT1, 2=1.0V L=10µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P VIN=2.7V 0 PWM/PFM Switching Control PWM Control 80 VIN=5.0V 60 10V 40 8.0V 6.0V 20 0 0.1 1 10 100 1000 0.1 Output Current1, 2 IOUT1, 2 (mA) FOSC=500kHz, VOUT1, 2=3.3V Efficiency1, 2 EFFI1, 2 (%) Efficiency1, 2 EFFI1, 2 (%) 100 PWM/PFM Switching Control PWM Control 80 10.0V 8.0V 60 6.0V 40 5.0V VIN=4.2V 20 10 100 1000 FOSC=500kHz, VOUT1, 2=3.3V L=10µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 100 1 Output Current1, 2 IOUT1, 2 (mA) 0 L=10µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P PWM/PFM Switching Control PWM Control 80 60 10.0V 40 8.0V VIN=6.0V 20 0 0.1 1 10 100 1000 0.1 Output Current1, 2 IOUT1, 2 (mA) 1 10 100 Output Current1, 2 IOUT1, 2 (mA) * When setting VOUT1, 2 =1.0V, VIN=8.0V, 10.0V, CL should be 94µF (Tantalum) + 100µF (OS-COM) 18 1000 XC9503 Series 2ch. Step-down DC/DC Controller ICs (3) Ripple Voltage vs. Output Current FOSC=300kHz, VOUT1, 2=1.0V FOSC=300kHz, VOUT1, 2=1.0V L=22µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 100 L=22µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 100 PWM/PFM Switching Control 80 Ripple Voltage1, 2 (mV) Ripple Voltage1, 2 (mV) PWM Control 60 VIN=2.7V 3.3V 5.0V 6.0V 40 8.0V 10V 4.2V 20 0 80 VIN=2.7V 60 40 6.0V 5.0V 10V 4.2V 20 0 0.1 1 10 100 1000 0.1 Output Current1, 2 IOUT1, 2 (mA) 1000 PWM/PFM Switching Control 80 VIN=2.7V 3.3V 4.2V 5.0V 6.0V 8.0V 10V 40 20 Ripple Voltage1, 2 (mV) Ripple Voltage1, 2 (mV) 100 L=22µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 100 PWM Control 60 10 FOSC=300kHz, VOUT1, 2=1.8V L=22µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 100 1 Output Current1, 2 IOUT1, 2 (mA) FOSC=300kHz, VOUT1, 2=1.8V 0 80 60 5.0V 4.2V 10V 8.0V 6.0V 3.3V VIN=2.7V 40 20 0 0.1 1 10 100 1000 0.1 1 10 100 1000 Output Current1, 2 IOUT1, 2 (mA) Output Current1, 2 IOUT1, 2 (mA) FOSC=300kHz, VOUT1, 2=2.5V FOSC=300kHz, VOUT1, 2=2.5V L=22µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 100 Ripple Voltage1, 2 (mV) PWM/PFM Switching Control 80 VIN=2.7V 3.3V 4.2V 5.0V 6.0V 8.0V 10V 60 L=22µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 100 PWM Control Ripple Voltage1, 2 (mV) 8.0V 3.3V 40 20 80 60 VIN=2.7V 10V 8.0V 6.0V 5.0V 4.2V 40 3.3V 20 0 0 0.1 1 10 100 Output Current1, 2 IOUT1, 2 (mA) 1000 0.1 1 10 100 Output Current1, 2 IOUT1, 2 (mA) * When setting VOUT1, 2 =1.0V, VIN=8.0V, 10.0V, CL should be 94µF (Tantalum) + 100µF (OS-COM) 19 1000 XC9503 Series 2ch. Step-down DC/DC Controller ICs (3) Ripple Voltage vs. Output Current (continued) FOSC=300kHz, VOUT1, 2=3.3V FOSC=300kHz, VOUT1, 2=3.3V L=22µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 100 L=22µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 100 PWM/PFM Switching Control 80 Ripple Voltage1, 2 (mV) Ripple Voltage1, 2 (mV) PWM Control VIN=4.2V 5.0V 6.0V 8.0V 10V 60 40 20 80 60 VIN=4.2V 5.0V 6.0V 40 0 0.1 1 10 100 1000 0.1 Output Current1, 2 IOUT1, 2 (mA) 10 100 1000 FOSC=300kHz, VOUT1, 2=5.0V L=22µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 100 1 Output Current1, 2 IOUT1, 2 (mA) FOSC=300kHz, VOUT1, 2=5.0V L=22µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 100 PWM/PFM Switching Control 80 60 VIN=6.0V 40 8.0V 10V 20 Ripple Voltage1, 2 (mV) PWM Control Ripple Voltage1, 2 (mV) 10.0V 20 0 80 60 40 VIN=6.0V 10.0V 8.0V 20 0 0 0.1 1 10 100 0.1 1000 1 10 100 Output Current1, 2 IOUT1, 2 (mA) Output Current1, 2 IOUT1, 2 (mA) FOSC=180kHz, VOUT1, 2=1.0V FOSC=180kHz, VOUT1, 2=1.0V L=47µH(CDRH6D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 100 PWM/PFM Switching Control VIN=2.7V 3.3V 4.2V 5.0V 6.0V 8.0V 10V 40 20 0 Ripple Voltage1, 2 (mV) 80 60 1000 L=47µH(CDRH6D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 100 PWM Control Ripple Voltage1, 2 (mV) 8.0V 80 60 VIN=2.7V 40 4.2V 10V 5.0V 6.0V 20 8.0V 3.3V 0 0.1 1 10 100 Output Current1, 2 IOUT1, 2 (mA) 1000 0.1 1 10 100 Output Current1, 2 IOUT1, 2 (mA) * When setting VOUT1, 2 =1.0V, VIN=8.0V, 10.0V, CL should be 94µF (Tantalum) + 100µF (OS-COM) 20 1000 XC9503 Series 2ch. Step-down DC/DC Controller ICs (3) Ripple Voltage vs. Output Current (continued) FOSC=180kHz, VOUT1, 2=3.3V FOSC=180kHz, VOUT1, 2=3.3V L=47µH(CDRH6D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 100 L=47µH(CDRH6D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 100 PWM Control PWM/PFM Switching Control 60 10V 40 8.0V 5.0V 20 VIN=4.2V 6.0V 80 Ripple Voltage1, 2 (mV) Ripple Voltage1, 2 (mV) 80 60 40 VIN=4.2V 5.0V 10V 0 0.1 1 10 100 1000 0.1 1 10 100 Output Current1, 2 IOUT1, 2 (mA) Output Current1, 2 IOUT1, 2 (mA) FOSC=180kHz, VOUT1, 2=5.0V FOSC=180kHz, VOUT1, 2=5.0V L=47µH(CDRH6D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 100 1000 L=47µH(CDRH6D28), CL=94µF(Tantaium) SD:CMS02, Tr:XP162A12A6P 100 PWM Control PWM/PFM Switching Control 80 Ripple Voltage1, 2 (mV) Ripple Voltage1, 2 (mV) 8.0V 20 0 60 40 10V 8.0V VIN=6.0V 20 0 80 60 40 VIN=6.0V 8.0V 10V 20 0 0.1 1 10 100 1000 0.1 1 10 100 Output Current1, 2 IOUT1, 2 (mA) Output Current1, 2 IOUT1, 2 (mA) FOSC=500kHz, VOUT1, 2=1.0V FOSC=500kHz, VOUT1, 2=1.0V L=10µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 100 PWM/PFM Switching Control Ripple Voltage1, 2 (mV) 80 60 1000 L=10µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 100 PWM Control Ripple Voltage1, 2 (mV) 6.0V VIN=2.7V 3.3V 4.2V 5.0V 6.0V 8.0V 10V 40 20 80 60 VIN=2.7V 40 8.0V 10V 5.0V 6.0V 4.2V 3.3V 20 0 0 0.1 1 10 100 Output Current1, 2 IOUT1, 2 (mA) 1000 0.1 1 10 100 Output Current1, 2 IOUT1, 2 (mA) * When setting VOUT1, 2 =1.0V, VIN=8.0V, 10.0V, CL should be 94µF (Tantalum) + 100µF (OS-COM) 21 1000 XC9503 Series 2ch. Step-down DC/DC Controller ICs (3) Ripple Voltage vs. Output Current (continued) FOSC=500kHz, VOUT1, 2=3.3V FOSC=500kHz, VOUT1, 2=3.3V L=10µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 100 PWM/PFM Switching Control 80 60 8.0V 10V 6.0V 40 5.0V VIN=4.2V Ripple Voltage1, 2 (mV) Ripple Voltage1, 2 (mV) PWM Control 20 L=10µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 100 0 80 60 VIN=4.2V 5.0V 40 10V 20 0 0.1 1 10 100 1000 0.1 Output Current1, 2 IOUT1, 2 (mA) 10 100 1000 FOSC=500kHz, VOUT1, 2=5.0V L=10µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 100 1 Output Current1, 2 IOUT1, 2 (mA) FOSC=500kHz, VOUT1, 2=5.0V L=10µH(CDRH5D28), CL=94µF(Tantalum) SD:CMS02, Tr:XP162A12A6P 100 PWM Control PWM/PFM Switching Control 80 60 40 10V 8.0V VIN=6.0V 20 Ripple Voltage1, 2 (mV) Ripple Voltage1, 2 (mV) 8.0V 6.0V 0 80 60 40 VIN=6.0V 8.0V 10V 20 0 0.1 1 10 100 1000 0.1 Output Current1, 2 IOUT1, 2 (mA) 1 10 100 Output Current1, 2 IOUT1, 2 (mA) 22 1000 XC9503 Series 2ch. Step-down DC/DC Controller ICs (4) Supply Current 1 vs. Supply Voltage (5) Supply Current 1_1 vs. Supply Voltage XC9503B092 (180KHz) 250 Topr=85OC 25OC - 40OC 200 Suppy Current 1-1 IDD1-1 (µA) Supply Current 1 IDD1 (µA) 250 XC9503B092 (180KHz) 150 100 50 0 Topr=85OC 25OC - 40OC 200 150 100 50 0 0 2 4 6 8 10 0 Supply Voltage VDD (V) Supply Current 2 IDD2 (µA) Supply Current 1-2 IDD1-2 (µA) 250 Topr=85OOC C Topr=85 O 25 OC 25 OC C 40OC -- 40 100 50 0 Topr=85OC 25OC - 40OC 200 150 100 50 2 4 6 8 10 0 2 Supply Voltage VDD (V) Oscillaltion Frequency Fosc (kHz) Stand-by Curret ISTB (µA) 6 4 2 0 6 8 10 XC9503B093(180kHz) Topr=85OC 25OC - 40OC 4 6 (9) Oscillation Frequency vs. Supply Voltage XC9503B092 (180KHz) 2 4 Supply Voltage VDD (V) (8) Stand-by Current vs. Supply Voltage 0 10 0 0 8 8 XC9503B092 (180KHz) 150 10 6 (7) Supply Current 2 vs. Supply Voltage XC9503B092 (180KHz) 200 4 Supply Voltage VDD (V) (6) Supply Current 1_2 vs. Supply Voltage 250 2 8 10 360 330 300 270 240 0 Suppy Voltage VDD (V) 2 4 6 8 Supply Voltage VDD (V) 23 10 XC9503 Series 2ch. Step-down DC/DC Controller ICs (10) EN1, 2 'High' 'Low' Voltage vs. Supply Voltage (11) PWM1, 2 'High' 'Low' Voltage vs. Supply Voltage XC9503B093 (300KHz) 0.8 PWM1, 2 'H' 'L' Voltage V PWM1 , 2 (V) EN1, 2 'H' 'L' Voltage VEN1, 2(V) XC9503B093 (300KHz) 0.6 - 40OC 0.4 85OC Topr=25OC 0.2 0 0 2 4 6 8 0.8 0.6 - 40OC 0.4 85OC O Topr=25 C 0.2 0 10 0 2 Supply Voltage VDD (V) L=22µH(CDRH5D28), CL=94µF (Tantalum) SD:CMS02 Tr:XP162A12A6 3.5 Topr=85OC 25OC - 40OC Output Voltage VOUT1, 2 (V) PFM duty ratio 1, 2 (%) 10 XC9503B093(300kHz) 30 25 20 3.4 3.3 3.2 VIN=5.0V IOUT1, 2 =200mA 3.1 3.0 0 2 4 6 8 10 0 2 Supply Voltage VDD (V) EXT1, 2 'Low' ON Resistance (Ω) 30 20 10 0 0 2 4 6 8 10 XC9503B092 (180KHz) Topr=85OC 25OC - 40OC 40 6 (14) EXT1, 2 'Low' On Resistance vs. Supply Voltage XC9503B092 (180KHz) 50 4 Supply Voltage VDD (V) (14) EXT1, 2 'High' On Resistance vs. Supply Voltage EXT1, 2 'High' On Resistance (Ω) 8 (13) Output Voltage vs. Ambient Temperature XC9503B093(300kHz) 35 6 Supply Voltage VDD (V) (12) PFM duty ratio 1, 2 vs. Supply Voltage 40 4 8 50 Topr=85OC 25OC - 40OC 40 30 20 10 0 0 10 2 4 6 Supply Voltage VDD (V) Supply Voltage VDD (V) 24 8 10 XC9503 Series 2ch. Step-down DC/DC Controller ICs (16) Soft Start Time 1, 2 vs. Supply Voltage Soft Start Time 1, 2 TSS1, 2 (msec) XC9503B092 (180KHz) 25 20 15 10 5 0 0 2 4 6 8 10 Supply Voltage VDD (V) 25 XC9503 Series 2ch. Step-down DC/DC Controller ICs ! Load Transient Response < VOUT1, 2 = 3.3 V, VIN = 5.0V IOUT1, 2 = 100µA ! 300mA > " PWM Control FOSC = 300kHz, VOUT1, 2 = 3.3V VIN = 5.0V, IOUT = 1, 2 = 100µA " 300mA CH1 FOSC = 300kHz, VOUT1, 2 = 3.3V VIN = 5.0V, IOUT = 1, 2 = 300mA " 100µA 3.3V 3.3V CH1 300mA CH2 100µA 300mA CH2 200µsec / div CH1 : VOUT1, 2, AC-COUPLED, 100mV/div CH2 : IOUT1, 2, 150mA/div 100µA 10msec / div CH1 : VOUT1, 2, AC-COUPLED, 50mV/div CH2 : IOUT1, 2, 150mA/div " PWM / PFM Switching Control FOSC = 300kHz, VOUT1, 2 = 3.3V VIN = 5.0V, IOUT = 1, 2 = 100µA " 300mA CH1 FOSC = 300kHz, VOUT1, 2 = 3.3V VIN = 5.0V, IOUT = 1, 2 = 300mA " 100µA 3.3V CH1 3.3V 300mA CH2 100µA 300mA CH2 200µsec / div CH1 : VOUT1, 2, AC-COUPLED, 100mV/div CH2 : IOUT1, 2, 150mA/div 100µA 10msec / div CH1 : VOUT1, 2, AC-COUPLED, 100mV/div CH2 : IOUT1, 2, 150mA/div 26 XC9503 Series 2ch. Step-down DC/DC Controller ICs ! Load Transient Response < VOUT1, 2 = 3.3 V, VIN = 5.0V IOUT1, 2 = 10mA ! 300mA > " PWM Control FOSC = 300kHz, VOUT1, 2 = 3.3V VIN = 5.0V, IOUT = 1, 2 = 10mA " 300mA CH1 FOSC = 300kHz, VOUT1, 2 = 3.3V VIN = 5.0V, IOUT = 1, 2 = 300mA " 10mA 3.3V 3.3V CH1 300mA CH2 10mA 300mA CH2 200µsec / div CH1 : VOUT1, 2, AC-COUPLED, 50mV/div CH2 : IOUT1, 2, 150mA/div 10mA 400µsec / div CH1 : VOUT1, 2, AC-COUPLED, 50mV/div CH2 : IOUT1, 2, 150mA/div " PWM / PFM Switching Control FOSC = 300kHz, VOUT1, 2 = 3.3V VIN = 5.0V, IOUT = 1, 2 = 10mA " 300mA CH1 FOSC = 300kHz, VOUT1, 2 = 3.3V VIN = 5.0V, IOUT = 1, 2 = 300mA " 10mA 3.3V CH1 3.3V 300mA CH2 10mA 300mA CH2 200µsec / div CH1 : VOUT1, 2, AC-COUPLED, 100mV/div CH2 : IOUT1, 2, 150mA/div 10mA 200µsec / div CH1 : VOUT1, 2, AC-COUPLED, 50mV/div CH2 : IOUT1, 2, 150mA/div 27 XC9503 Series 2ch. Step-down DC/DC Controller ICs ! Load Transient Response < VOUT1, 2 = 0.9 V, VIN = 3.3V IOUT1, 2 = 100µA ! 300mA > " PWM Control FOSC = 300kHz, VOUT1, 2 = 0.9V VIN = 3.3V, IOUT = 1, 2 = 100µA " 300mA CH1 FOSC = 300kHz, VOUT1, 2 = 0.9V VIN = 3.3V, IOUT = 1, 2 = 300mA " 100µA 0.9V CH1 0.9V 300mA CH2 100µA 300mA CH2 200µsec / div CH1 : VOUT1, 2, AC-COUPLED, 20mV/div CH2 : IOUT1, 2, 150mA/div 100µA 4msec / div CH1 : VOUT1, 2, AC-COUPLED, 20mV/div CH2 : IOUT1, 2, 150mA/div " PWM / PFM Switching Control FOSC = 300kHz, VOUT1, 2 = 0.9V VIN = 3.3V, IOUT = 1, 2 = 100µA " 300mA CH1 FOSC = 300kHz, VOUT1, 2 = 0.9V VIN = 3.3V, IOUT = 1, 2 = 300mA " 100µA 0.9V CH1 0.9V 300mA CH2 100µA 300mA CH2 200µsec / div CH1 : VOUT1, 2, AC-COUPLED, 20mV/div CH2 : IOUT1, 2, 150mA/div 100µA 200µsec / div CH1 : VOUT1, 2, AC-COUPLED, 50mV/div CH2 : IOUT1, 2, 150mA/div 28 XC9503 Series 2ch. Step-down DC/DC Controller ICs ! Load Transient Response < VOUT1, 2 = 0.9 V, VIN = 3.3V IOUT1, 2 = 10mA ! 300mA > " PWM Control FOSC = 300kHz, VOUT1, 2 = 0.9V VIN = 3.3V, IOUT = 1, 2 = 10mA " 300mA CH1 FOSC = 300kHz, VOUT1, 2 = 0.9V VIN = 3.3V, IOUT = 1, 2 = 300mA " 10mA 0.9V CH1 0.9V 300mA CH2 300mA 10mA CH2 100µsec / div CH1 : VOUT1, 2, AC-COUPLED, 20mV/div CH2 : IOUT1, 2, 150mA/div 10mA 100µsec / div CH1 : VOUT1, 2, AC-COUPLED, 20mV/div CH2 : IOUT1, 2, 150mA/div " PWM / PFM Switching Control FOSC = 300kHz, VOUT1, 2 = 0.9V VIN = 3.3V, IOUT = 1, 2 = 10mA " 300mA CH1 FOSC = 300kHz, VOUT1, 2 = 0.9V VIN = 3.3V, IOUT = 1, 2 = 300mA " 10mA 0.9V CH1 0.9V 300mA CH2 300mA 10mA CH2 200µsec / div CH1 : VOUT1, 2, AC-COUPLED, 20mV/div CH2 : IOUT1, 2, 150mA/div 10mA 200µsec / div CH1 : VOUT1, 2, AC-COUPLED, 20mV/div CH2 : IOUT1, 2, 150mA/div 29 XC9503 Series 2ch. Step-down DC/DC Controller ICs ! Load Transient Response < PWM Control ! PWM / PFM Switching Control > FOSC = 300kHz, VOUT1, 2 = 3.3V VIN = 5.0V, IOUT = 1, 2 = 5mA PWM1, 2 'Low' " 'High' CH1 FOSC = 300kHz, VOUT1, 2 = 3.3V VIN = 5.0V, IOUT = 1, 2 = 5mA PWM1, 2 'HIgh' " 'Low' 3.3V CH1 3.3V 0.65V CH2 0.65V 0V CH2 400µsec / div CH1 : VOUT1, 2, AC-COUPLED, 10mV/div CH2 : IOUT1, 2, 0.5V/div 0V 200µsec / div CH1 : VOUT1, 2, AC-COUPLED, 20mV/div CH2 : IOUT1, 2, 0.5V/div < Soft Start Wave Form > FOSC = 300kHz, VOUT1, 2 = 3.3V VIN = 5.0V, IOUT = 1, 2 = 300mA EN1, 2 'Low' " 'High' CIN=47µF FOSC = 300kHz, VOUT1, 2 = 3.3V VIN = 5.0V, IOUT = 1, 2 = 100mA EN1, 2 'Low' " 'High' CIN=47µF 3.3V 3.3V CH1 CH1 200mA 75mA CH2 CH2 0.65V 0.65V CH3 CH3 4msec / div CH1 : VOUT1, 2, 2.0V/div CH2 : IIN1, 2, 100mA/div CH3 : EN1, 2, 0.5V/div 4msec / div CH1 : VOUT1, 2, 2.0V/div CH2 : IIN1, 2, 50mA/div CH3 : EN1, 2, 0.5V/div * CH1 : EN2=GND when measurement CH2 : EN1=GND when measurement 30