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| x Large Output Current Step-up/down DC/DC x Fast Response x Input Voltage Range: 0.9~10.0V x Output Voltage Range: 2.5~6.0V(2%) x Oscillator Frequency: 180kHz x High Efficiency: 75% (typ.) x SOP-8 Package e s General Description The XC6361/62 series are step-up/down DC/DC converters. With a N-Channel Power MOSFET built-in, the series comprises of PWM (/PFM switching) controlled, step-up switching regulator types (SWR) and series regulator types with externally connected transistors (VR). A highly efficient, low ripple, step-up/down DC/DC converter can be realized using an externally connected coil, diode, 2 capacitors and a PNP transistor. From a wide input voltage range of between 0.9V to 10V, a stable power output can be supplied through the series regulator. Output voltage is programmable in 0.1V steps betwen 2.5V to 6.0V. (2.0% accuracy) Since the difference between the SWR output voltage (VUP) and the VR output voltage (VOUT) is only 0.4V, losses with the VR type during step up/down operations is minimised. With the SWR type, an output current of 200mA (VOUT=3.0V, VIN=2.04V) is possible through the use of the built-in N-channel power MOSFET. Further, using an external transistor, an output current of more than 300mA is possible. With a 180kHz switching frequency, the size of the external components can be reduced. As control switches to PFM during light loads with the XC6362, the series is highly efficient from light loads through to large output currents. It is possible to adjust soft-start time by connecting a capacitor externally. During stand-by, current consumption can be reduced to less than 1.0A. s Applications q Electronic Information Organizers q Palmtops q Cellular and portable phones q Portable Audio Systems q Various Multi-function Power Supplies s Features Input voltage range: 0.9V~10V Output voltage range: 2.5V~6.0V programmable in 0.1V steps (2.0%) Oscillator frequency: 180kHz (15%) Max. output current: 200mA (VIN=2.04V, VOUT=3.0V) : More than 300mA possible (external Tr connected to SWR) High Efficiency: 75% (typ.) (VIN=1.8V, VOUT=3.0V) Stand-by capability: ISTB=1.0A (max.) Fast Response(input change, load change) Soft-start time set-up possible Integral protection circuit built-in N-ch Power MOSFET built-in (SWR step-up switch) Package: SOP-8 s Pin Configuration 1 2 3 4 8 7 6 5 s Pin Assignment PIN NUMBER 1 2 3 4 5 6 7 8 PIN NAME GND VOUT VR_EXT CSS VUP CE SWR_EXT LX FUNCTION Ground Regulator output PNP Transistor drive Soft-start capacitor connection SWR output, Power supply Chip enable SWR external switch transistor drive (CMOS output) SWR switch SOP-8 (TOP VIEW) s Selection Guide START With Integral Protection Circuit XC6361A, XC6362A Without Integral Protection Circuit XC6361B, XC6362B e s Ordering Information XC6361 XC6361 Series A B PWM Control Integral protection - Yes Integral protection - No Output voltage e.g. 3.0V output : ( =3, =0) 2 S R L Oscillator frequency 180kHz Package SOP-8 Embossed Tape : standard loading : reverse loading XC6362 XC6362 Series PWM/PFM switching control (same as XC6361 series) s Block Diagram EXT Internal VDD LX VR_EXT Buffer, Driver Phase Compensation VUP VOUT + VR Error Amp. + - Nch FET SW GND Ramp Wave Generator, OSC + - PWM Comparator SWR Error Amp. - Protection CE Vref with Soft Start PWM/PFM Controller CSS s Absolute Maximum Ratings PARAMETER VUP Pin Voltage LX Pin Voltage EXT Pin Voltage LX Pin Current EXT Pin Current VOUT Pin Voltage VR_EXT Pin Voltage VR_EXT Pin Current SYMBOL VUP VLX VEXT ILX IEXT VOUT VVREXT IVREXT VCSS VCE Pd Topr Tstg RATINGS -0.3 ~ 12 -0.3 ~ 12 -0.3 ~ VUP +0.3 700 50 -0.3 ~ 12 -0.3 ~ VUP +0.3 50 -0.3 ~ VUP +0.3 -0.3 ~ VUP +0.3 300 -30 ~ +80 -40 ~ +125 Ta=25: UNITS V V V mA mA V V mA V V mW : : e CSS Pin Voltage CE Pin Voltage Continuous Total Power Dissipation Operating Ambient Temperature Storage Temperature s Electrical Characteristics XC6361A332SR, XC6362A332SR PARAMETER SYMBOL VOUT VOUT2 VIN VST1 VST2 VHLD IDD1 IDD2 ISTB Tss VCEH VCEL TPRO VOUT=3.3V CONDITIONS MIN TYP Ta=25: MAX UNITS V V V V V V A A A msec V V msec Overall Output Voltage Output Voltage 2 Maximum Input Voltage Operation Start-up Voltage Oscillation Start-up Voltage Oscillation Hold Voltage Supply Current 1 Supply Current 2 Stand-by Current Soft-Start Time CE "High" Voltage CE "Low" Voltage Circuit Protection Integer Time VIN=Output voltage x 0.6 VIN=Output voltage + 1.0V IOUT=1.0mA, RB=1k No external components, Apply voltage to VUP IOUT=1.0mA No external components, VUP=(output voltage + 0.4V)x0.95 No external components, VUP=output voltage + 1.0V Same as IDD1, VCE=0V Same as IDD1, Existence of EXT oscillation Same as IDD1, Disappearance of EXT oscillation Only CSS connected, UVP=output voltage +1.0V, VOUT=output voltage 1.0V, Apply VR protection base current. Time taken for the CSS pin to become "L" after VUP has been decreased by VUP x0.95 VIN=Output voltage x 0.6 3.0 0.75 1.5 6.0 3.234 3.300 3.366 3.234 3.300 3.366 10.0 0.9 0.8 0.8 0.7 590 42 900 64 1.0 12.0 0.20 3.0 6.0 Efficiency EFFI 76 % SWR VUP Output Voltage Lx Switch-on Resistance Lx Leak Current EXT "High" ON Resistance EXT "Low" ON Resistance Maximum Duty Ratio PFM Duty Ratio Oscillator Frequency VUP RSWON ILXL REXTH REXTL MAXDTY PFMDTY FOSC VIN=Output voltage x 0.6 Same as IDD1, VLX=0.1V No external components, VUP=VLX=10V Same as IDD1, VEXT=VUP-0.4V Same as IDD1, VEXT=0.4V Same as IDD1, measuring of EXT waveform VIN=VOUT, no load (XC6362 only) Same as IDD1, measuring of EXT waveform 78 10 153 24 16 85 20 180 3.7 0.49 0.90 1.0 45 30 93 30 207 V A % % kHz VR VOUT Output Current VR Protection Base Current IVOUT IVREXT Apply VUP=output voltage + 1.0V CSS only connected, VUP=output voltage +1.0V 1.0 10 20 30 A mA Measuring conditions: Unless otherwise specified, connect CE to VUP, IOUT=66mA Note: During step up/down operations, output voltage 2 represents the voltage during step down. XC6361B332SR, XC6362B332SR The following parameters are not applicable in the about table: Circuit Protection Integer Time (TPRO) , VR Protection Base Current (IVREXT) s Electrical Characteristics XC6361A502SR, XC6362A502SR PARAMETER SYMBOL VOUT VOUT2 VIN VST1 VST2 VHLD IDD1 IDD2 ISTB Tss VCEH VCEL TPRO VOUT=5.0V CONDITIONS VIN=Output voltage x 0.6 VIN=Output voltage + 1.0V IOUT=1.0mA, RB=1k No external components, Apply voltage to VUP IOUT=1.0mA No external components, VUP=(output voltage + 0.4V)x0.95 No external components, VUP=output voltage + 1.0V Same as IDD1, VCE=0V Same as IDD1, Existence of EXT oscillation Same as IDD1, Disappearance of EXT oscillation Only CSS connected, UVP=output voltage +1.0V, VOUT=output voltage 1.0V, Apply VR protection base current. Time taken for the CSS pin to become "L" after VUP has been decreased by VUP x0.95 VIN=Output voltage x 0.6 3.0 0.75 1.5 6.0 0.7 1000 43 1600 65 1.0 12.0 0.20 3.0 6.0 MIN TYP Ta=25: MAX UNITS V V V V V V A A A msec V V msec Overall Output Voltage Output Voltage 2 Maximum Input Voltage Operation Start-up Voltage Oscillation Start-up Voltage Oscillation Hold Voltage Supply Current 1 Supply Current 2 Stand-by Current Soft-Start Time CE "High" Voltage CE "Low" Voltage Circuit Protection Integer Time 4.900 5.000 5.100 4.900 5.000 5.100 10.0 0.8 0.9 0.8 e Efficiency EFFI 79 % SWR VUP Output Voltage Lx Switch-on Resistance Lx Leak Current EXT "High" ON Resistance EXT "Low" ON Resistance Maximum Duty Ratio PFM Duty Ratio Oscillator Frequency VUP RSWON ILXL REXTH REXTL MAXDTY PFMDTY FOSC VIN=Output voltage x 0.6 Same as IDD1, VLX=0.1V No external components, VUP=VLX=10V Same as IDD1, VEXT=VUP-0.4V Same as IDD1, VEXT=0.4V Same as IDD1, measuring of EXT waveform VIN=VOUT, no load (XC6362 only) Same as IDD1, measuring of EXT waveform 78 10 153 18 12 85 20 180 5.4 0.41 0.80 1.0 33 23 93 30 207 V A % % kHz VR VOUT Output Current VR Protection Base Current IVOUT IVREXT Apply VUP=output voltage + 1.0V CSS only connected, VUP=output voltage +1.0V 1.0 10 20 30 A mA Measuring conditions: Unless otherwise specified, connect CE to VUP, IOUT=100mA Note: During step up/down operations, output voltage 2 represents the voltage during step down. XC6361B502SR, XC6362B502SR The following parameters are not applicable in the about table: Circuit Protection Integer Time (TPRO) , VR Protection Base Current (IVREXT) s Standard Circuit SD L VIN EXT CE CIN + CSS CSS VUP VR_EXT VOUT RB PNP Tr VOUT CIN + + CUP GND e L SD CUP C: PNP Tr CSS RB : 47H (Sumida CD75) : MA735 (Schottky Diode, Matsushita) : 10V 47F (Tantalum capacitor, Nichicon F93) : 10V 10F (Aluminium electrolytic capacitor) : 2SA1213 (Toshiba) : 2200pF (ceramic capacitor) : 0 s Typical Application Circuit 1. Large current output circuit (for use with externally connected N-channel Power MOSFETs) SD L VIN LX CE CIN + Tr CSS CSS VUP VR_EXT VOUT RB PNP Tr VOUT CL + + CUP GND s STANDARD CIRCUIT CHARACTERISTICS (1) OUTPUT VOLTAGE vs. OUTPUT CURRENT OUTPUT VOLTAGE:VOUT (V) OUTPUT VOLTAGE:VOUT (V) e OUTPUT CURRENT :IOUT (mA) OUTPUT CURRENT :IOUT (mA) (2) EFFICIENCY vs. OUTPUT CURRENT EFFICIENCY:EFFI (%) OUTPUT CURRENT :IOUT (mA) EFFICIENCY:EFFI (%) OUTPUT CURRENT :IOUT (mA) (3) OUTPUT VOLTAGE vs. AMBIENT TEMP. (4) OUTPUT VOLTAGE 2 vs. AMBIENT TEMP. OUTPUT VOLTAGE:VOUT2 (V) (5) SUPPLY CURRENT 1 vs. AMBIENT TEMP. SUPPLYU CURRENT 1:IDD1 (A) OUTPUT VOLTAGE:VOUT (V) AMBIENT TEMP. :Topr (:) AMBIENT TEMP. :Topr (:) AMBIENT TEMP. :Topr (:) (6) SUPPLY CURRENT 2 vs. AMBIENT TEMP. SUPPLYU CURRENT 2:IDD2 (A) (7) SOFT START TIME vs. AMBIENT TEMP. SOFT START TIME:TSS (msec) (8) LX SWITCH ON RESISTANCE vs. AMBIENT TEMP. LX SWITCH ON RESISTANCE:RSWON () AMBIENT TEMP. :Topr (:) AMBIENT TEMP. :Topr (:) AMBIENT TEMP. :Topr (:) (9) EXT "H" ON RESISTANCE vs. AMBIENT TEMP. EXT "H" ON RESISTANCE:REXTH () EXT "L" ON RESISTANCE:REXTL () (10) EXT "L" ON RESISTANCE vs. AMBIENT TEMP. MAX. DUTY RATIO:MAXDTY (%) AMBIENT TEMP. :Topr (:) (11) MAX. DUTY RATIO vs. AMBIENT TEMP. e AMBIENT TEMP. :Topr (:) AMBIENT TEMP. :Topr (:) (12) PFM DUTY RATIO vs. AMBIENT TEMP. OSCILLATION FREQUENCY:FOSC (kHz) PFM DUTY RATIO:PFMDTY (%) (13) OSCILLATION FREQUENCY vs. AMBIENT TEMP. (14) CIRCUIT PROTECT INTEGER TIME vs. AMBIENT TEMP. CIRCUIT PROTECT INTEGER TIME:TPRO AMBIENT TEMP. :Topr (:) AMBIENT TEMP. :Topr (:) AMBIENT TEMP. :Topr (:) s TYPICAL APPLICATION CIRCUIT CHARACTERISTICS LARGE CURRENT OUTPUT CIRCUIT EXAMPLE (1) OUTPUT VOLTAGE vs. OUTPUT CURRENT (2) EFFICIENCY vs. OUTPUT CURRENT OUTPUT VOLTAGE:VOUT (V) OUTPUT CURRENT :IOUT (mA) EFFICIENCY:EFFI (%) OUTPUT CURRENT :IOUT (mA) |
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