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| x CMOS Low Power Consumption x Operating Voltage : 0.9V~10.0V x Output Voltage Range: 2.0V~7.0V x Output Voltage Accuracy: 2.5% x Selectable Oscillator Frequency: (50kHz, 100kHz, 180kHz) s Applications q Cellular phones, Pagers q Palmtops q Cameras, Video recorders q Portable products s General Description s Features Operating (start-up) voltage range: 0.9V~10V Output voltage range: 2.0V~7.0V in 0.1V increments Highly accurate: Set-up voltage 2.5% Oscillator frequency: 50kHz, 100kHz, 180khz (15%) selectable Maximum output currents (Tr built-in) : Typ.100mA at VIN=3.0, VOUT=5.0V .....Note(1) Highly efficient (Tr built-in): Typ.85% at VIN=3.0, VOUT=5.0V.....Note(1) Built-in switching transistor type and an external Tr type available. Five-lead packaged units offer either Chip Enable or independent VOUT pin option. Phase compensation and slow start-up circuits built-in Small package: SOT-89 mini-power mold (3-pin, 5-pin) Note(1): Performance depends on external components and PCB layout. e The XC6371 series is a group of PWM controlled step-up DC/DC converters. The XC6371 series employs CMOS process and laser trimming technologies so as to attain low power and high accuracy. On-chip proprietary phase compensation and slow start-up circuits ensure excellent transient response and improved performance. Output voltage can be selected from 2.0V to 7.0V in 0.1V increments (accuracy: 2.5%). Oscillator frequency is also selectable from three frequencies; 50, 100, and 180kHz (accuracy: 15%). Every built-in switching transistor type enables a step-up circuit to be configured using only three external components; a coil, a diode, and a capacitor. External transistor versions are available to accommodate high output current applications. 5-pin packages, which are provided with either a CE (chip enable) function that reduces power consumption during shut-down mode, or a VDD pin (separated power and voltage detect pins) are available. SOT-89 small package. s Selection Guide PART TYPE OPERATION MODE PWM PACKAGE SWITCHING RELATED Built-in Transistor "Lx"lead External Transistor "EXT"lead Built-in Transistor "Lx"lead External Transistor "EXT"lead ADDITIONAL FUNCTION -----------FEATURES * Switching transistor incorporated standard type. * Low ripple and highly efficient from low current XC6371A SOT-89-3 to high current. * External switching transistor standard type. * Adding external transistor can improve the XC6371B PWM SOT-89-3 ------------ output capability up to several hundred mA. * Stand-by XC6371C PWM SOT-89-5 Chip Enable(CE) (CE)function added version to the XC6371A. * Stand-by current: 0.5A max. * Stand-by XC6371D PWM SOT-89-5 Chip Enable(CE) (CE)function added version to the XC6371B. * Stand-by current: 0.5A max. * Individual XC6371E PWM SOT-89-5 Built-in Transistor Separated "Lx"lead "VDD"and"VOUT"leads External Transistor Separated "EXT"lead "VDD"and"VOUT"leads power supply and set-up voltage sensing leads are available power supply and set-up voltage sensing leads are available. XC6371F PWM SOT-89-5 * Individual s Pin Configuration 5 4 1 2 SOT-89 (TOP VIEW) 3 1 2 SOT-89-5 (TOP VIEW) 3 e s Pin Assignment (XC6371A,XC6371B) PIN NUMBER PIN NAME XC6371A 1 2 3 -XC6371B 1 2 -3 VSS VOUT Lx EXT Ground Output voltage monitor / IC internal power supply Switch External switch transistor drive FUNCTION (XC6371C,XC6371D) PIN NUMBER PIN NAME XC6371C 5 2 4 -3 1 XC6371D 5 2 -4 3 1 VSS VOUT Lx EXT CE NC Ground Output voltage monitor / IC internal power supply Switch External switch transistor drive Chip Enable No Connection FUNCTION (XC6371E,XC6371F) PIN NUMBER PIN NAME XC6371E 5 2 4 -3 1 XC6371F 5 2 -4 3 1 VSS VDD Lx EXT VOUT NC Ground IC internal power supply Switch External switch transistor drive Output voltage monitor No Connection FUNCTION s Block Diagram XC6371A ~ XC6371D (The VOUT pin is used also for the VDD pin.) Lx Buffer PWM Control OSC 50/100/180KHz VLX limiter Slow Start Vref VDD Buffer PWM Control OSC 50/100/180KHz Vref VLX limiter Slow Start XC6371E and XC6371F VDD VDD Lx Phase comp. Vss VOUT Vss Phase comp. VOUT e EXT Chip Enable EXT CE Note: Built-in tr.type units use the LX pin. External tr.type units use the EXT pin. The CE pin is only used with the XC6371C and XC6371D. Note: The VDD pin is only used with XC6371E and XC6371F. Built-in tr.type units use the LX pin. External tr.type units use the EXT pin. s Absolute Maximum Ratings PARAMETER VOUT Input Voltage Lx pin Voltage Lx pin Current EXT pinVoltage EXT pin Current CE Input Voltage Continuous Total Power Dissipation VDD Input Voltage Operating Ambient Temperature Storage Temperature SYMBOL VOUT VLX ILX VEXT IEXT VCE Pd VDD Topr Tstg RATINGS 12 12 400 VSS -0.3 ~ VOUT+0.3 50 12 500 12 -30 ~ +80 -40 ~ +125 Ta=25: UNITS V V mA V mA V mW V : : s Electrical Characteristics XC6371A501PR PARAMETER Output Voltage Maximum Input Voltage Operation Start-up Voltage Oscillation Start-up Voltage Supply Current 1 Supply Current 2 Lx Switch-On Resistance Lx Leakage Current Oscillator Frequency Maximum Duty Ratio Lx Limit Voltage Efficiency Slow-Start Time VOUT=5.0V,FOSC=100kHZ SYMBOL VOUT VIN VST1 VST2 IDD1 IDD2 RSWON ILXL FOSC MAXDTY VLXLMT EFFI TSS 4.0 External Components Connected. IOUT=1mA. No external components. Apply voltage to VOUT. Lx : 10k pull-up to 5V. Same as VST2. Apply output voltage0.95 to VOUT. Same as VST2. Apply output voltage1.1 to VOUT. Same as IDD 1. VLX=0.4V. No external components. VOUT=VLX=10V. Same as IDD 1. Measuring of Lx waveform. Same as IDD 1. Measuring of Lx waveform. Same as IDD 1. Apply output voltage to Lx. Voltage required to produce FOSC2 85 80 0.7 85 10.0 20.0 100 87 80.2 8.2 1.4 CONDITIONS MIN 4.875 10 0.90 0.80 133.8 16.5 2.4 1.0 115 92 1.3 TYP 5.000 MAX 5.125 Ta=25: UNITS V V V V A A A kHz % V % ms Measuring conditions : Unless otherwise specified, VIN=VOUT 0.6, IOUT=50mA. See Typical Application Circuits, Fig.1. s Electrical Characteristics XC6371B501PR PARAMETER Output Voltage Maximum Input Voltage Operation Start-up Voltage Oscillation Start-up Voltage Supply Current 1 Supply Current 2 EXT"High" On Resistance EXT"Low" On Resistance Oscillator Frequency Maximum Duty Ratio Efficiency Slow-Start Time Vout=5.0V,Fosc=100kHz SYMBOL VOUT VIN VST1 VST2 IDD1 IDD2 REXTH REXTL FOSC MAXDTY EFFI TSS 4.0 External Components Connected.IOUT=1mA. No external components. Apply voltage to VOUT. Same as VST2. Apply output voltage0.95 to VOUT. Same as VST2. Apply output voltage1.1 to VOUT. Same as IDD 1. VEXT=-0.4V. Same as IDD 1. VEXT=0.4V. Same as IDD1. Measuring of EXT waveform. Same as IDD1. Measuring of EXT waveform. 85 80 40.0 8.2 37.5 30 100 87 85 10.0 20.0 CONDITIONS MIN 4.875 10 0.90 0.80 66.8 16.5 62.5 50 115 92 TYP 5.000 MAX 5.125 Ta=25: UNITS V V V V A A kHZ % % ms e Measuring conditions: Unless otherwise specified, VIN=VOUT0.6, IOUT=50mA. See Typical Application Circuits, Fig.2. XC6371C501PR PARAMETER Output Voltage Vout=5.0V,Fosc=100kHz SYMBOL VOUT VIN VST1 VST2 IDD1 IDD2 RSWON ILXL FOSC MAXDTY ISTB VCEH VCEL ICEH ICEL VLxLMT EFFI TSS 4.0 External Components Connected.IOUT=1mA. No external components. Apply voltage to VOUT. Lx : 10k pull-up to 5V. Same as VST2. Apply output voltage0.95 to VOUT. Same as VST2. Apply output voltage1.1 to VOUT. Same as IDD 1. VLX=0.4V. No external components. VOUT=VLx=10V. Same as IDD 1. Measuring of Lx waveform. Same as IDD 1. Measuring of Lx waveform. Same as IDD 1. Same as IDD 1. Existence of Lx Oscillation. Same as IDD 1. Disappearance of Lx Oscillation. Same as IDD 1.VCE=VOUT0.95. Same as IDD 1. VCE=0V. Same as IDD 1. Apply output voltage to Lx. Voltage required to produce FOSC2. 0.7 85 10.0 20.0 0.75 0.20 0.25 -0.25 1.3 85 80 100 87 80.2 8.2 1.4 CONDITIONS MIN 4.875 10 0.90 0.80 133.8 16.5 2.4 1.0 115 92 0.5 TYP 5.000 MAX 5.125 Ta=25: UNITS V V V V A A A kHZ % A V V A A V % ms Maximum Input Voltage Operation Start-up Voltage Oscillation Start-up Voltage Supply Current 1 Supply Current 2 Lx Switch- On Resistance Lx Leakage Current Osicillator Frequency Maximum Duty Ratio Stand-by Current CE"High"Voltage CE"Low"Voltage CE"High"Current CE"Low"Current Lx Limit Voltage Efficiency Slow-Start Time Measuring conditions: Unless otherwise specified, connect CE to VOUT,VIN=VOUT0.6, IOUT=50mA. See Typical Application Circuits, Fig.3. s Electrical Characteristics XC6371D501PR PARAMETER Output Voltage Maximum Input Voltage Operation Start-up Voltage Oscillation Start-up Voltage Supply Current 1 Supply Current 2 EXT "High" On Resistance EXT "Low" On Resistance Oscillator Frequency Maximum Duty Ratio Stand-by Current CE"High"Voltage CE"Low"Voltage CE"High"Current CE"Low"Current Efficiency Slow-Start Time VOUT=5.0V,FOSC=100kHZ SYMBOL VOUT VIN VST1 VST2 IDD1 IDD2 REXTH REXTL FOSC MAXDTY ISTB VCEH VCEL ICEH ICEL EFFI TSS 4.0 External Components Connected. IOUT=1mA. No external components. Apply voltage to Vout. Same as VST2. Apply output voltage0.95 to VOUT. Same as VST2. Apply output voltage1.1 to VOUT. Same as IDD 1. VEXT=-0.4V. Same as IDD 1. VEXT=0.4V. Same as IDD 1. Measuring of EXT waveform. Same as IDD 1. Measuring of EXT waveform. Same as IDD 1. Same as IDD 1. Existence of Lx Oscillation. Same as IDD 1. Disappearance of Lx Oscillation. Same as IDD 1.VCE=VOUT0.95. Same as IDD 1.VCE=0V. 85 10.0 20.0 0.75 0.20 0.25 -0.25 85 80 40.0 8.2 37.5 30 100 87 CONDITIONS MIN TYP Ta=25: MAX UNITS 5.125 V V 0.90 0.80 66.8 16.5 62.5 50 115 92 0.5 V V A A kHz % A V V A A % ms 4.875 5.000 10 e Measuring conditions: Unless otherwise specified, connect CE to VOUT,VIN=VOUT0.6, IOUT=50mA. See Typical Application Circuits,Fig.4. XC6371E501PR PARAMETER Output Voltage VOUT=5.0V,FOSC=100kHZ SYMBOL VOUT VIN VST1 VST2 IDD1 IDD2 RSWON ILXL FOSC MAXDTY VLxLMT EFFI TSS 4.0 External Components Connected. IOUT=1mA. No external components. Apply voltage to VOUT. Same as VST2. Apply output voltage0.95 to VOUT. Same as VST2. Apply output voltage1.1 to VOUT. Same as IDD 1. VLX=0.4V. No external components. VOUT=VLX=10V. Same as IDD 1. Measuring of Lx waveform. Same as IDD 1. Measuring of Lx waveform. Same as IDD 1. Apply output voltage to Lx. Voltage required to produce FOSC2. 85 80 0.7 85 10.0 20.0 100 87 80.2 8.2 1.4 CONDITIONS MIN 10 0.90 0.80 133.8 16.5 2.4 1.0 115 92 1.3 TYP 4.875 5.000 5.125 Ta=25: MAX UNITS V V V V A A A kHz % V % ms Maximum Input Voltage Operation Start-up Voltage Oscillation Start-up Voltage Supply Current 1 Supply Current 2 Lx Switch-On Resistance Lx Leakage Current Osicillator Frequency Maximum Duty Ratio Lx Limit Voltage Efficiency Slow-Start Time Measuring conditions: Unless otherwise specified, connect VDD to Vout,VIN=VOUT0.6, IOUT=50mA. SeeTypical Application Circuits,Fig.5. Note: When the VDD and VOUT pins are independently used, the voltage range at the VDD pin should be 2.2V to 10V. The IC operates from VDD=0.8V. However, output voltage and oscillator frequency are properly stabilized when VDD=2.2V or higher. s Electrical Characteristics XC6371F501PR PARAMETER Output Voltage Maximum Input Voltage Operation Start-up Voltage Oscillation Start-up Voltage Supply Current 1 Supply Current 2 EXT "High" On-Resistance EXT "Low" On-Resistance Oscillator Frequency Maximum Duty Ratio Efficiency Slow-Start Time VOUT=5.0V,FOSC=100kHZ SYMBOL VOUT VIN VST1 VST2 IDD1 IDD2 REXTH REXTL FOSC MAXDTY EFFI TSS 4.0 External Components Connected. IOUT=1mA. No external components. Appply voltage to VOUT. Same as VST2. Apply output voltage0.95 to VOUT. Same as VST2. Apply output voltage1.1 to VOUT. Same as IDD 1. VEXT=-0.4V. Same as IDD 1. VEXT=0.4V. Same as IDD 1.Measuring of EXT waveform. Same as IDD 1.Measuring of EXT waveform. 85 85 40.0 8.2 37.5 30 100 87 85 10.0 20.0 CONDITIONS MIN 4.875 10 0.90 0.80 66.8 16.5 62.5 50 115 92 TYP 5.000 MAX 5.125 Ta=25: UNITS V V V V A A kHz % % ms e Measuring conditions: Unless otherwise specified, connect VDD to VOUT,VIN=VOUT0.6, IOUT=50mA. See Typical Application Circuits, Fig.6. Note: When the VDD and VOUT pins are independently used, the voltage range at the VDD pin should be 2.2V to 10V. The IC operates from VDD=0.8V. However, output voltage and oscillator frequency are properly stabilized when VDD=2.2V or higher. s Typical Application Circuits SD L VOUT L SD VOUT VIN VIN SOT-89-3 (TOP VIEW) Tr CL SOT-89-3 (TOP VIEW) CL 1 2 3 CB RB 1 2 3 GND GND L: SD: CL: 100H (SUMIDA, CD-54) Diode (Schottky diode; MATSUSHITA, MA735) 16V 47F (Tantalum capacitor; NICHICON, F93) L: SD: CL: RB: Tr: 47H (SUMIDA, CD-54) MA735 (Schottky diode; MATSUSHITA) 16V 47F (Tantalum capacitor; NICHICON, F93) 1k, CB:3300pF (FOSC=100kHz) 2SC3279, 2SD1628G Fig.1 XC6371A Application Fig.2 XC6371B Application s Typical Application Circuits CE VOUT L SD L SD CE VOUT 3 VIN 2 (TOP VIEW) 1 Tr VIN CL CB RB 3 2 (TOP VIEW) 1 SOT-89-5 SOT-89-5 CL e 4 5 4 5 GND GND L: 100H (SUMIDA, CD-54) SD: Diode (Schottky diode; MATSUSHITA, MA735) CL: 16V 47F (Tantalum capacitor, NICHICON, F93) L: SD: CL: RB: Tr: 47H (SUMIDA, CD-54) MA735 (Schottky diode; MATSUSHITA) 16V 47F (Tantalum capacitor, F93) 1k, CB : 3300pF (FOSC=100kHZ) 2SC3279, 2SD1628G Fig.3 XC6371C Application Fig.4 XC6371D Application SD L VOUT L SD VOUT 3 VIN 2 (TOP VIEW) 1 Tr VDD CL VIN 3 2 (TOP VIEW) 1 VDD CL SOT-89-5 SOT-89-5 4 5 CB RB 4 5 GND GND L: 100H (SUMIDA, CD-54) SD: Diode (Schottky diode; MATSUSHITA, MA735) CL: 16V 47F (Tantalum capacitor, NICHICON, F93) L: SD: CL: RB: Tr: 47H (SUMIDA, CD-54) MA735 (Schottky diode; MATSUSHITA) 16V 47F (Tantalum capacitor, F93) 1k,CB : 3300pF (FOSC=100kHZ) 2SC3279, 2SD1628G Fig.5 XC6371E Application Fig.6 XC6371F Application s Electrical Characteristics XC6371A (1)OUTPUT VOLTAGE vs. OUTPUT CURRENT e (2)EFFICIENCY vs. OUTPUT CURRENT (3)NO LOAD, INPUT CURRENT vs. INPUT VOLTAGE (4)RIPPLE VOLTAGE vs OUTPUT CURRENT e (5) OPERATING START VOLTAGE/RETAIN VOLTAGE vs. OUTPUT CURRENT (6) LOAD TRANSIENT RESPONSE OUTPUT CURRENT IOUT(mA) s Electrical Characteristics XC6371B (External Tr) (1) OUTPUT VOLTAGE vs. INPUT 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) RIPPLE VOLTAGE vs. OUTPUT CURRENT OUTPUT CURRENT:IOUT(mA) RIPPLE: Vr (mVp-p) RIPPLE:Vr (mVp-p) OUTPUT CURRENT:IOUT(mA) (4) LOAD TRANSIENT RESPONSE Output Voltage e Output Current Time (20msec/div) Output Voltage Output Current Time (20msec/div) (External Components) CIN=47F (Tantalum) CL=47F (Tantalum) 2 SD:MA735 Tr:2SD1628G OUTPUT CURRENT IOUT(mA) OUTPUT VOLTAGE:VOUT(V) OUTPUT CURRENT IOUT(mA) OUTPUT VOLTAGE:VOUT(V) |
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