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GO-Compatible
CMOS Low Power Consumption APPLICATIONS Operating Voltage :0.9V~10.0V Cellular phones, Pagers Output Voltage Range :2.0V~7.0V Palmtops Output Voltage Accuracy :2.5% Cameras, Video recorders Oscillation Frequency :50kHz, 100kHz, 180kHz(XC6371/72)
Portable products
30kHz (XC6373)
GENERAL DESCRIPTION
The XC6371/6372/6373 series are a group of PWM controlled and PWM/PFM controlled step-up DC/DC converters. The built-in 1.4 switching transistor type enables a step-up circuit to be configured using only three components, a coil, a diode, and a capacitor. Output voltage can be selectable in the range from 2.0V to 7.0V in increments of 100mV (accuracy: 2.5%). Oscillation frequency is also selectable from 50kHz, 100kHz, and 180kHz (accuracy:15%) for the XC6371 and the XC6372 series. Soft-start time is internally set and offers protection against in-rush currents when the power is switched on and prevents voltage overshoot. 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. The XC6371 series is the standard PWM controlled products. The control of the XC6372 series switches from PWM to PFM control during light loads when automatically switching is selected and the series is highly efficient from light loads to large output currents. Since the XC6373 series is a low noise, it is suitable for a wireless circuit. Also the series is particularly suited for use with pager applications because oscillation frequency is set at 30kHz (20%) so as to attain the lowest consumption current possible.
FEATURES
Operation Start Voltage Range: 0.9V~10V Output Voltage Range : 2.0V~7.0V in 100mV increments Highly Accurate : Setting voltage accuracy2.5% Oscillation Frequency : 50kHz, 100kHz, 180kHz (15%) selectable (XC6371/72) 30kHz (XC6373) Maximum Output Currents (Tr. built-in) : 100mA(TYP.) @ VIN=3.0V, VOUT=5.0V * Highly Efficient (Tr. built-in) : 85%(TYP.) @ VIN=3.0V, VOUT=5.0V * Built-in switching transistor type. Five-lead packaged units offer either chip enable or independent VOUT pin option. Phase compensation and soft start-up circuits built-in. Small Packages :SOT-89, SOT-89-5,USP-6B *: Performance depends on external components and PCB layout.
TYPICAL APPLICATION CIRCUIT
TYPICAL PERFORMANCE CHARACTERISTICS
XC6371 6372 6373 ETR0402_001.doc
581
XC6371/6372/6373 Series
PIN CONFIGURATION
PIN ASSIGNMENT
XC6371/72/73A PIN NUMBER SOT-89 1 2 3 USP-6B 6 1 4 2, 3, 5 PIN NAME VSS VOUT Lx NC
*The dissipation pad for the USP-6B package should be solder-plated in recommended mount pattern and metal masking so as to enhance mounting strength and heat release. If the pad needs to be connected to other pins, it should be connected to the pin No.1.
FUNCTION Ground Output Voltage Monitor/IC Internal Power Supply Switch No Connection
XC6371/72/73C PIN NUMBER SOT-89-5 5 2 4 3 1 USP-6B 6 1 4 3 2, 5 PIN NAME VSS VOUT Lx CE NC FUNCTION Ground Output Voltage Monitor/IC Internal Power Supply Switch Chip Enable No Connection
XC6371/72/73E PIN NUMBER SOT-89-5 5 2 4 3 1 USP-6B 6 1 4 3 2, 5 PIN NAME VSS VDD Lx VOUT NC FUNCTION Ground IC Internal Power Supply Switch Output Voltage Monitor No Connection
582
XC6371/6372/6373
Series
PRODUCT CLASSIFICATION
Selection Guide
START PWM Low Frequency PWM XC6371 XC6373 XC6371/73A XC6371/73C XC6371/73E
Standard Chip Enable Separated VDD/VOUT
PWM/PFM
Standard Chip Enable Separated VDD/VOUT
XC6372A XC6372C XC6372E
Ordering Information
XC6371 : PWM controlled XC6372 : PWM/PFM switching control DESIGNATOR DESCRIPTION Type of Regulator SYMBOL A C E Integer 0 1 2 P D R L DESCRIPTION : 3-pin regulator with built-in switching transistor : Stand-by capability with built-in switching transistor : Separated VDD and VOUT with built-in switching transistor : e.g. VOUT=3.5V=3, : 50kHz : 100kHz : 180kHz : SOT-89 (XC6371/72 A type) : SOT-89-5 (XC6371/72 C/D type) : USP-6B : Embossed tape, standard feed : Embossed tape, reverse feed =5
XC6371 Series
Output Voltage
Oscillation Frequency
Package
Device Orientation
XC6373 : PWM controlled DESIGNATOR DESCRIPTION Type of Regulator SYMBOL A C E Integer 0 P D R L DESCRIPTION : 3-pin regulator with built-in switching transistor : Stand-by capability with built-in switching transistor : Separated VDD and VOUT with built-in switching transistor : e.g. VOUT=3.5V=3, : 30kHz : SOT-89 (XC6373 A type) : SOT-89-5 (XC6373 C/D type) : USP-6B : Embossed tape, standard feed : Embossed tape, reverse feed =5
Output Voltage Oscillation Frequency Package
Device Orientation
583
XC6371/6372/6373 Series
PACKAGING INFORMATION
SOT-89 SOT-89-5
USP-6B
584
XC6371/6372/6373
Series
MARKING RULE
[XC6371/72] SOT-89, SOT-89-5
Represents product series MARK A A S PRODUCT SERIES XC6371A XC6371C XC6371E MARK 1 1 3 PRODUCT SERIES XC6372A XC6372C XC6372E

Represents integer of output voltage and oscillation frequency OUTPUT VOLTAGE (V) 50kHz B C F E F H K OSCILLATION FREQUENCY 100kHz 180kHz 1 1 2 2 3 3 4 4 5 5 6 6 7 7
1
2
SOT-89 (TOP VIEW)
3
1.x 2.x 3.x 4.x 5.x 6.x 7.x
Represents decimal number of output voltage and oscillation frequency OUTPUT VOLTAGE (V) x.0 x.1 x.2 x.3 x.4 x.5 x.6 x.7 x.8 x.9 50kHz 0 1 2 3 4 5 6 7 8 9 OSCILLATION FREQUENCY 100kHz 180kHz 0 A 1 B 2 C 3 D 4 E 5 F 6 H 7 K 8 L 9 M
SOT-89-5 (TOP VIEW)
Represents production lot number 0 to 9, A to Z repeated (G, I, J, O, Q, W excepted).
585
XC6371/6372/6373 Series
MARKING RULE (Continued)
[XC6371/72] (Continued) USP-6B
Represents product series MARK 5 2 Represents product classification USP-6B (TOP VIEW) MARK A C E PRODUCT SERIES XC6371A XC6371C XC6371E PRODUCT SERIES XC6371xxxxDx XC6372xxxxDx
Represents output voltage (ex.) MARK 3 5 3 0 OUTPUT VOLTAGE (V) 3.3 5.0
Represents oscillation frequency MARK 0 1 2
OSCILLATION FREQUENCY (kHz) 50 100 180
Represents production lot number 0 to 9, A to Z repeated (G, I, J, O, Q, W excepted) Note: No character inversion used.
586
XC6371/6372/6373
XC6373
Series
MARKING RULE (Continued)
SOT-89,SOT-89-5
Represents product series MARK A A S FUNCTION Built-in Transistor CE Built-in Transistor Separated VDD and VOUT Built-in Transistor PRODUCT SERIES XC6372AxxxPx XC6372CxxxPx XC6372ExxxPx

Represents integer of output voltage and oscillation frequency OUTPUT VOLTAGE (V)
1
2
SOT-89 (TOP VIEW)
3
1.x 2.x 3.x 4.x 5.x 6.x 7.x
OSCILLATION FREQUENCY (PRODUCT SERIES) 30kHz (XC6373xxx0Px) B C F E F H K
Represents decimal number of output voltage and oscillation frequency OUTPUT VOLTAGE (V) x.0 x.1 x.2 x.3 x.4 x.5 x.6 x.7 x.8 x.9 OSCILLATION FREQUENCY (PRODUCT SERIES) 30kHz (XC6373xxx0Px) 0 1 2 3 4 5 6 7 8 9
SOT-89-5 (TOP VIEW)
Represents production lot number 0 to 9, A to Z repeated (G, I, J, O, Q, W excepted).
587
XC6371/6372/6373 Series
BLOCK DIAGRAMS
XC6371/72/73A, C (The VOUT pin serves also as VDD)
(
p
)
Soft Start Vref
Phase comp
Lx VLx l imi ter Buffer PWM Control OSC 50/100/180KHz VDD VOUT
VSS
EXT
+
Chip Enable CE
Note: The CE pin is only used with the XC6371C.
XC6371/72/73E
VDD Lx VLx l imi ter Buffer PWM Control OSC 50/100/180KHz Soft Start Vref
Phase comp
VDD
VSS
VOUT
EXT
+
Note: Built-in transistor type units use the Lx pin.
ABSOLUTE MAXIMUM RATINGS
Ta=25 PARAMETER VOUT Input Voltage LX pin Voltage LX pin Current CE Input Voltage SOT-89, 89-5 Power Dissipation USP-6B VDD Input Voltage Operating Temperature Range Storage Temperature Range SYMBOL VOUT VLX ILX VCE Pd VDD Topr Tstg RATINGS 12 12 400 12 500 100 12 -30~80 -40~125 UNITS V V mA V mW V
588
XC6371/6372/6373
Series
ELECTRICAL CHARACTERISTICS
VOUT=5.0V, FOSC=100kHZ XC6371/72A501PR PARAMETER SYMBOL CONDITIONS Output Voltage VOUT Maximum Input Voltage VIN Operation Start Voltage VST1 External Components Connected, IOUT=1mA No external components. Apply voltage to VOUT Oscillation Start Voltage VST2 Lx : 10k pull-up to 5V No Load Input Current IIN VIN=VOUTx0.8, IOUT=0mA (*1) Same as VST2, Supply Current 1 IDD1 Apply output voltagex0.95 to VOUT Same as VST2, Supply Current 2 IDD2 Apply output voltagex1.1 to VOUT Lx Switch-On RSWON Same as IDD1, VLX=0.4V Resistance Lx Leak Current ILXL No external components. VOUT=VLX=10V Oscillation Frequency FOSC Same as IDD1. Measuring of Lx waveform Maximum Duty Ratio MAXDTY Same as IDD1. Measuring of Lx waveform PFM Duty Ratio (*4) PFMDTY Same as IDD1. Measuring of Lx waveform Same as IDD1. Apply output voltage to Lx, Lx Limit Voltage VLXLMT Voltage required to produce FOSCx2 Efficiency EFFI Slow-Start Time TSS MIN. 4.875 10 85 80 10 0.7 4.0 TYP. 5.000 12.8 80.2 8.2 1.4 100 87 17 85 10.0 Ta=25 MAX. UNITS 5.125 V V 0.90 V 0.80 25.7 133.8 16.5 2.4 1.0 115 92 25 1.3 20.0 V A A A A kHz % % V % mS
NOTE: Unless otherwise stated, VIN=VOUTx0.6, IOUT=50mA. See Typical Application Circuits, Circuit1 *1: The Schottky diode (SD) must be type MA735, with reverse current (IR)<1.0A at reverse voltage (VR)=10.0V.(XC6372A) *2: "Supply Current 1" is the supply current while the oscillator is continuously oscillating. In actual operation the oscillator periodically operates which results in less average power consumption. The current actually provided by an external VIN source is represented by "No Load Input Current (IIN)". *3: When PWM operates at PWM Mode. *4: When PFM operates at PFM Mode.(XC6372A)
589
XC6371/6372/6373 Series
ELECTRICAL CHARACTERISTICS (Continued)
XC6371/72C501PR PARAMETER Output Voltage Maximum Input Voltage Operation Start Voltage Operation Start Voltage No Load Input Current Supply Current 1 Supply Current 2 Lx Switch-On Resistance Lx Leak Current Oscillation Frequency Maximum Duty Ratio PFM Duty Ratio (*4) Stand-by Current CE "High" Voltage CE "Low" Voltage CE "High" Current CE "Low" Current Lx Limit Voltage Efficiency Slow-Start Time VOUT=5.0V, FOSC=100kHz SYMBOL VOUT VIN VST1 VST2 IIN IDD1 IDD2 RSWON ILXL FOSC MAXDTY PFMDTY ISTB VCEH VCEL ICEH ICEL VLxLMT EFFI TSS CONDITIONS MIN. 4.875 10 85 80 10 0.75 0.7 4.0 TYP. 5.000 12.8 80.2 8.2 1.4 100 87 17 85 10.0 MAX. 5.125 0.90 0.80 25.7 133.8 16.5 2.4 1.0 115 92 25 0.5 0.20 0.25 -0.25 1.3 20.0 Ta=25 UNITS V V V V A A A A kHZ % % A V V A A V % ms
External Components Connected, IOUT=1mA No external components. Apply voltage to VOUT, Lx : 10k pull-up to 5V VIN=VOUTx0.8, IOUT=0mA (*1) Same as VST2, Apply output voltagex0.95 to VOUT Same as VST2, Apply output voltagex1.1 to VOUT Same as IDD1, VLx=0.4V No external components, VOUT =VLX=10V Same as IDD1, Measuring of Lx waveform Same as IDD1, Measuring of Lx waveform Same as IDD1, Measuring of Lx waveform Same as IDD1 Same as IDD1, Lx Oscillation start Same as IDD1, Lx Oscillation stop Same as IDD1, VCE=VOUTx0.95 Same as IDD1, VCE=0V Same as IDD1, Apply output voltage to Lx, Voltage required to produce FOSCx2
NOTE: Unless otherwise stated, connect CE to VOUT, VIN=VOUTx0.6, IOUT=50mA. See Typical Application Circuits, Circuit 2. *1: The Schottky diode (SD) must be type MA735, with reverse current (IR)<1.0A at reverse voltage (VR)=10.0V.(XC6372C) *2: "Supply Current 1" is the supply current while the oscillator is continuously oscillating. In actual operation the oscillator periodically operates which results in less average power consumption. The current actually provided by an external VIN source is represented by "No Load Input Current (IIN)". *3: When PWM operates at PWM Mode. *4: When PFM operates at PFM Mode.(XC6372C)
590
XC6371/6372/6373
Series
ELECTRICAL CHARACTERISTICS (Continued)
XC6371/72E501PR PARAMETER Output Voltage Maximum Input Voltage Operation Start Voltage Oscillation Start Voltage No Load Input Voltage Supply Current 1 Supply Current 2 Lx Switch-On Resistance Lx Leak Current Oscillation Frequency Maximum Duty Ratio PFM Duty Ratio (*4) Lx Limit Voltage Efficiency Slow-Start Time VOUT=5.0V, FOSC=100kHz SYMBOL CONDITIONS VOUT VIN VST1 External Components Connected, IOUT=1mA No external components, VST2 Apply voltage to VOUT, Lx:10kpull-up to 5V IIN VIN=VOUTx0.8, IOUT=0mA(*1) Same as VST2, IDD1 Apply output voltagex0.95 to VOUT Same as VST2, IDD2 Apply output voltagex1.1 to VOUT RSWON ILXL FOSC MAXDTY PFMDTY VLxLMT EFFI TSS Same as IDD1, VLX=0.4V No external components, VOUT =VLX=10V Same as IDD1, Measuring of Lx waveform Same as IDD1, Measuring of Lx waveform Same as IDD1, Measuring of Lx waveform Same as IDD1, Apply output voltage to Lx, Voltage required to produce FOSCx2 MIN. 4.875 10 85 80 10 0.7 4.0 TYP. 5.000 12.8 80.2 8.2 1.4 100 87 17 85 10.0 Ta=25 MAX. UNITS 5.125 V V 0.90 V 0.80 25.7 133.8 16.5 2.4 1.0 115 92 25 1.3 20.0 V A A A A kHZ % % V % ms
NOTE: Unless otherwise stated, connect VDD to VOUT, VIN=VOUTx0.6, IOUT=50mA. See Typical Application Circuits, Circuit 3. *1: The Schottky diode (SD) must be type MA2Q735, with reverse current (IR)<1.0A at reverse voltage (VR)=10.0V.(XC6372E) *2: "Supply current 1" is the supply current while the oscillator is continuously oscillating. In actual operation the oscillator periodically operates which results in less average power consumption. The current actually provided by external VIN source is represented by "No Load Input Current (IIN)". *3: When PWM operates at PWM Mode. *4: When PFM operates at PFM Mode.(XC6372E) *5: When the VDD and VOUT pins are independently used, the voltage range at the VDD pin should be 2.2V to 10V. VDD=0.8V. However, output voltage and oscillation frequency are properly stabilized when VDD=2.2V or higher. The IC operates from
591
XC6371/6372/6373 Series
ELECTRICAL CHARACTERISTICS (Continued)
XC6373A300PR VOUT=3.0V, FOSC=30kHz SYMBOL VOUT VIN VST1 VST2 IDD1 IDD2 RSWON ILXL FOSC MAXDTY EFFI TSS CONDITIONS MIN. 2.925 10 24 80 4.0 TYP. 3.000 13.1 3.9 3.4 30 87 77 10.0 PARAMETER Output Voltage Maximum Input Voltage Operation Start Voltage Oscillation Start Voltage Supply Current 1 Supply Current 2 Lx Switch-On Resistance Lx Leak Current Oscillation Frequency Maximum Duty Ratio Efficiency Slow-Start Time Ta=25 MAX. UNITS 3.075 V V 0.90 0.80 21.9 7.9 5.7 1.0 36 92 20.0 V V A A A kHZ % % mS
External Components Connected, IOUT=1mA No external components, Apply voltage to VOUT, LX :10kpull-up to 5V Same as VST2. Apply output voltagex0.95 to VOUT Same as VST2, Apply output voltagex1.1 to VOUT Same as IDD1, VLX=0.4V No external components, VOUT =VLX=10V Same as IDD1, Measuring of Lx waveform Same as IDD1, Measuring of Lx waveform
NOTE: Unless otherwise stated, VIN=VOUTx0.6, IOUT=15mA. See Typical Application Circuits, Circuit 1.
XC6373A330PR
VOUT=3.3V, FOSC=30kHz SYMBOL VOUT VIN VST1 VST2 IDD1 IDD2 RSWON ILXL FOSC MAXDTY EFFI TSS CONDITIONS MIN. 3.128 10 24 80 4.0 TYP. 3.300 14.1 4.0 3.4 30 87 77 10.0 MAX. 3.383 0.90 0.80 23.5 8.1 5.7 1.0 36 92 20.0
Ta=25 UNITS V V V V A A A kHZ % % mS
PARAMETER Output Voltage Maximum Input Voltage Operation Start Voltage Oscillation Start Voltage Supply Current 1 Supply Current 2 Lx Switch-On Resistance Lx Leak Current Oscillation Frequency Maximum Duty Ratio Efficiency Slow-Start Time
External Components Connected, IOUT=1mA No external components, Apply voltage to VOUT, LX :10kpull-up to 5V Same as VST2, Apply output voltagex0.95 to VOUT Same as VST2, Apply output voltagex1.1 to VOUT Same as IDD1. VLX=0.4V No external components, VOUT =VLX=10V Same as IDD1, Measuring of Lx waveform Same as IDD1, Measuring of Lx waveform
NOTE: Unless otherwise stated, VIN=VOUTx0.6, IOUT=16.5mA. See Typical Application Circuits, Circuit 1.
592
XC6371/6372/6373
Series
TYPICAL APPRICATION CIRCUITS
Circuit 1: XC6372A series Circuit 2: XC6372C series
L :: 100H (CR54, SUMIDA) L 100H (CR54, SUMIDA) SD : MA2Q735 (Schottky Diode; MATUSHITA) CL : 16V47F (Tantalum Capacitor, NICHICHEMI MCE)
L : 100H (CR54, SUMIDA) SD : MA2Q735 (Schottky Diode; MATUSHITA) CL : 16V 47F (Tantalum Capacitor, NICHICHEMI MCE)
Circuit 3: XC6372E series
L : 100H (CR54, SUMIDA) SD : MA2Q735 (Schottky Diode; MATUSHITA) CL : 16V 47F (Tantalum Capacitor; NICHICHEMI MCE)
593
XC6371/6372/6373 Series
TYPICAL PERFORMANCE CHARACTERISTICS
(1) Output Voltage vs. Output Current
XC6371A501PR
Output Voltage:VOUTV
5.2 5.1 5.0 4.9 4.8
0.1 1 10 100 1000
L100H(CR54),CL47F(Tantalum)
XC6371A301PR
Output Voltage:VOUTV
3.10 3.05 3.00 2.95 2.90
0.1 1 10 100 1000 Tantalum L100H CR54CL47F
1.2V VIN=0.9V
1.5V
2.0V 3.0V
VIN=1.0V
1.2V
1.5V 1.8V
4.0V
2.7V
Output Current:IOUTmA
Output Current:IOUTmA
XC6372A501PR
Output Voltage:VOUTV
XC6372A301PR
Output Voltage:VOUTV
3.10 3.05 3.00 2.95 2.90 0.1 1 10 100 Output Current:IOUT (mA) 1000
L100H C54CL47F Tantalum
5.2 5.1 5.0 4.9 4.8 0.1
L100H C54CL47F Tantalum
1.2V VIN=0.9V
1.5V
2.0V 3.0V
1.2V VIN=0.9V
1.5V
1.8V
4.0V
2.7V
1 10 100 Output Current:IOUT (mA)
1000 1000
XC6373A300PR
3.10
Output Voltage: VOUT (V)
L=100H(C54),C L100H(CR54),
L =47F() CL47F Tantalum
3.05 3.00 2.95 2.90 0.1
VIN=0.9V
1.2V
1.5V
1.8V
2.7V
1
10
100
1000
Output Current: IOUT(mA)
594
XC6371/6372/6373
Series
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(2) Efficiency vs. Output Current
XC6371A501PR
100 80 60
L100H(CR54),CL47F(Tantalum)
XC6371A301PR
100 80
L100H(CR54),CL47F(Tantalum)
4.0V
2.7V
Efficiency:EFFI(%)
VIN=0.9V 1.2V 1.5V
3.0V
40 20 0
0.1 1
Efficiency:EFFI(%)
2.0V
60 40 20 0
0.1
VIN=0.9V 1.8 V 1.2V 1.5V
10
100
1000 1000
1
10
100
1000 1000
Output Current:IOUTmA
Output Current:IOUTmA
XC6373A300PR
100
Efficiency: EFFI (%)
L100H(CR54), CL47F Tantalum
2.7V
80 60 40 20 0 0.1
VIN=0.9V 1.2V 1.5V 1.8V
1 10 100 Output Current: IOUT(mA)
1000
595
XC6371/6372/6373 Series
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(3) Ripple Voltage vs. Output Current
XC6371A301PR
Ripple Voltage:VrmVp-p
100 80 60
L100H(CR54),CL47F(Tantalum)
1.8V 1.5V 1.2V VIN=0.9V 2.7V
40 20 0 0.1
1 10 100 Output Current:IOUT (mA)
1000
XC6373A300PR
100 Ripple Voltage: Vr (mVp-p) 80 60 40 20 0 0.1
1.2V VIN=0.9V 1.8V 1.5V 2.7V
L100H(CR54), CL47F Tantalum
10 1 1 0 100 Output Current: IOUT(mA)
1000
596
XC6371/6372/6373
Series
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(4) No Load Input Current vs. Input Voltage
XC6371A301PR
500
L100H C54CL47F Tantalum
Input Current:IIN (A)
400 300 200 100 0 0 1 2 3 Input Voltage:VIN (V)
XC6372A501PR
200
Input Current:IIN (A)
L100H C54CL47F Tantalum
150 100 50 0 0 1 2 3 4 5 Input Voltage:VIN (V)
597
XC6371/6372/6373 Series
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(5) Operation Start Voltage / Hold Voltage vs. Output Current
(6) Load Transient Response
598

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