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NCMOS Low Power Consumption NOperating Voltage NOutput Voltage Range : 0.9V~10.0V : 2.0V~7.0V
GCellular phones, Pagers GPalmtops GCameras, Video recorders GPortable products
NOutput Voltage Accuracy : 2.5% NSelectable Oscillator Frequency : 50kHz, 100kHz, 180kHz
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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 @ VIN=3.0, VOUT=5.0V .....Note(1) Highly efficient (Tr built-in) : Typ.85% @ VIN=3.0, VOUT=5.0V .....Note(1) Built-in switching transistor type and an external Tr type are available. Five-lead packaged units offer either Chip Enable or independent VOUT pin option. Phase compensation and soft 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.
The XC6371 series are a group of PWM controlled step-up DC/DC converters. On-chip proprietary phase compensation and soft 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.
437
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(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
438
GSelection 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
to high current.
* External switching transistor standard type. * Adding external transistor can improve the
XC6371B
PWM
SOT-89
------------
output capability up to several hundred mA. (CE)function added version to the XC6371A. * Stand-by current: 0.5A max.
* Stand-by * Stand-by
XC6371C
PWM
SOT-89-5
Chip Enable(CE)
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.
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XC6371F
PWM
SOT-89-5
* Individual
GOrdering Information
XC6371qwerty XC6371 Series
A B C D E F
PWM Controlled
3-pin. Built-in switching transistor 3-pin. External switching transistor Stand-by capability. Built-in switching transistor Stand-by capability. External switching transistor Separated VDD and VOUT. Built-in switching transistor Separated VDD and VOUT. External switching transistor Output Voltage e.g.,VOUT=3.5V w=3, e=5 OSC Frequency 50kHz OSC Frequency 100kHz OSC Frequency 180kHz Package q=A ~ B SOT-89 q=C ~ F SOT-89-5 Embossed tape: Standard Feed Embossed tape: Reverse Feed
q
w e r t y 0 1 2 P R L
439
GSOT-89
4
GSOT-89-5
440
w q
r e
2 1
4 3
q
4
w
e
r
441
XC6371E and XC6371F
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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. The VOUT pin is used also for the VDD pin.
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.
Ta=25C
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 UNITS V V mA V mA V mW V
C C
XC6371A501PR
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. 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=25C
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 Oscillator Frequency Maximum Duty Ratio Lx Limit Voltage Efficiency Slow-Start Time
Measuring conditions : Unless otherwise specified, VIN=VOUT 0.6, IOUT=50mA. See Typical Application Circuits, Fig.1.
442
XC6371B501PR
PARAMETER Output Voltage
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=25C UNITS V V V V A A kHZ % % ms
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
4
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=25C 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.
443
XC6371D501PR
PARAMETER Output Voltage
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=25C 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
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
4
Maximum Duty Ratio Stand-by Current CE"High"Voltage CE"Low"Voltage CE"High"Current CE"Low"Current Efficiency Slow-Start Time
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=25C 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.
444
XC6371F501PR
PARAMETER Output Voltage
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=25C UNITS V V V V A A kHz % % ms
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
4
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.
L SD CL CIN
: 100H (SUMIDA, CR-54) : MA2Q735 (Schottky diode; MATSUSHITA) : 16V 47F (Tantalum capacitor; NICHCON, MCE) : 16V220F (Alminium Electrolytic Capacitor)
L : 47H (SUMIDA, CR-54) SD : MA2Q735 (Schottky diode; MATSUSHITA) CL : 16V 47F (Tantalum capacitor; NICHCON MCE) CIN : 16V220F (Alminium Electrolytic Capacitor) RB : 1k, CB:3300pF (FOSC=100kHz) Tr : 2SC3279, 2SD1628G
Fig.1 XC6371A Application
Fig.2 XC6371B Application
445
4
L : 100H (SUMIDA, CR-54) SD : MA2Q735 (Schottky diode; MATSUSHITA) CL : 16V 47F (Tantalum capacitor, NICHICON, MCE)
L : 47H (SUMIDA, CR-54) SD : MA2Q735 (Schottky diode; MATSUSHITA) CL : 16V 47F (Tantalum capacitor, NICHICON, MCE)
CIN : 16V220F (Alminium Electrolytic Capacitor)
CIN : 16V220F (Alminium Electrolytic Capacitor)
RB : 1k, CB : 3300pF (FOSC=100kHZ) Tr : 2SC3279, 2SD1628G
Fig.3 XC6371C Application
Fig.4 XC6371D Application
L : 100H (SUMIDA, CR-54) SD : MA2Q735 (Schottky diode; MATSUSHITA) CL : 16V 47F (Tantalum capacitor, NICHICON, MCE)
L : 47H (SUMIDA, CR-54) SD : MA2Q735 (Schottky diode; MATSUSHITA) CL : 16V 47F (Tantalum capacitor, NICHICON, MCE)
CIN : 16V220F (Alminium Electrolytic Capacitor)
CIN : 16V220F (Alminium Electrolytic Capacitor)
RB : 1k,CB : 3300pF (FOSC=100kHZ) Tr : 2SC3279, 2SD1628G
Fig.5 XC6371E Application
Fig.6 XC6371F Application
446
(1) OUTPUT VOLTAGE vs. OUTPUT CURRENT
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(2) EFFICIENCY vs. OUTPUT CURRENT
(3) RIPPLE VOLTAGE vs. OUTPUT CURRENT
447
(4)NO LOAD, INPUT CURRENT vs. INPUT VOLTAGE
4
(5) OPERATING START VOLTAGE/RETAIN VOLTAGE vs. OUTPUT CURRENT (6) LOAD TRANSIENT RESPONSE
448
Output Current:IOUT(mA)
(7) OUTPUT VOLTAGE vs. OUTPUT CURRENT
Output Voltage:VOUT (V)
Output Voltage:VOUT (V)
Output Current:IOUT (mA)
Output Current:IOUT (mA)
4
(8) EFFICIENCY vs. OUTPUT CURRENT
Efficiency:EFFI (%)
Output Current:IOUT (mA)
Efficiency:EFFI (%)
Output Current:IOUT (mA)
(9) RIPPLE VOLTAGE vs. OUTPUT CURRENT
Ripple Voltage:Vr (mVp-p)
Output Current:IOUT (mA)
Ripple Voltage:Vr (mVp-p)
Output Current:IOUT (mA)
CIN=100F (Electrolytic), CL=47F (Tantalum) 2, SD:MA735, Tr:2SD1628G
449
(10) LOAD TRANSIENT RESPONSE
Output Voltage
4
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
450
Output Current:IOUT (mA)
Output Voltage:VOUT (V)
Output Current:IOUT (mA)
Output Voltage:VOUT (V)

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