XC6372B501PR [ETC]

Analog IC ; 模拟IC\n
XC6372B501PR
型号: XC6372B501PR
厂家: ETC    ETC
描述:

Analog IC
模拟IC\n

模拟IC
文件: 总10页 (文件大小:62K)
中文:  中文翻译
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Dual Mode [PWM/PFM] Step-up DC/DC Converters  
XC6372 Series  
HP010199  
Applications  
Cellular phones, pagers  
Palmtops  
Cameras, video recorders  
Portable equipment  
CMOS Low Power Consumption  
Operating Voltage: 0.9V~10.0V  
Output Voltage Range: 2.0V~7.0V  
Output Voltage Accuracy: ±2.5%  
Selectable Oscillator Frequency:  
(50kHz, 100kHz, 180kHz)  
General Description  
The XC6372 series, unlike the conventional PWM controlled converters,  
are a group of step-up DC/DC converters that automatically change their  
operation modes into PFM modes while loads are light, such as when the  
duty ratios are less than 10%.  
When loads are light, as in the stand-by mode, the XC6372 changes to  
PFM control so as to decrease oscillator frequencies, resulting in reduced  
supply current.  
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%  
Therefore, the XC6372 is suitable for use with portable equipment that  
requires the PWM controlled performance of low ripple and high output  
current, and a supply current that varies between low and high. Built-in  
proprietary phase compensation and slow start-up circuits ensure excellent  
transient response and improved performance.  
at VIN=3.0V, VOUT=5.0V.....Note(1)  
Both switching transistor built-in and external Tr types are available.  
Five-lead packaged units offer either Chip Enable or independent  
VOUT pin option.  
Phase compensation and slow startup circuits included.  
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%).  
Small package: SOT-89 mini-power mold (3-pin, 5-pin)  
Note(1): Performance depends on external components and PCB layout.  
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.  
SOT-89 small package.  
Selection Guide  
OPERATION  
MODE  
SWITCHING  
RELATED  
ADDITIONAL  
PART TYPE  
PACKAGE  
SOT-89-3  
FEATURES  
FUNCTION  
Switching transistor incorporated standard type.  
PFM operation during light loads.  
Built-in Transistor  
"Lx"lead  
XC6372A  
PWM/PFM  
PWM/PFM  
PWM/PFM  
PWM/PFM  
PWM/PFM  
PWM/PFM  
------------  
External switching transistor standard type.  
Adding external transistor can improve the  
output capability up to several hundred mA.  
External Transitor  
"EXT"lead  
XC6372B  
XC6372C  
XC6372D  
XC6372E  
XC6372F  
SOT-89-3  
SOT-89-5  
SOT-89-5  
SOT-89-5  
SOT-89-5  
------------  
Stand-by (CE) function added version to the  
XC6372A  
Stand-by current: 0.5µA max.  
Built-in Transitor  
"Lx"lead  
Chip Enable(CE)  
Chip Enable(CE)  
Stand-by (CE) function added version to the  
XC6372B  
Stand-by current: 0.5µA max.  
External Transitor  
"EXT"lead  
Individual power supply and set-up voltage  
sensing leads are available  
Built-in Transitor  
"Lx"lead  
Separated  
"VDD"and"VOUT"leads  
Individual power supply and set-up voltage  
sensing leads are available.  
External Transitor  
"EXT"lead  
Separated  
"VDD"and"VOUT"leads  
215  
e-52  
Dual Mode [PWM/PFM] Step-up DC/DC Converters  
XC6372 Series  
Pin Configuration  
5
4
3
1
2
3
1
2
SOT-89  
SOT-89-5  
(TOP VIEW)  
(TOP VIEW)  
Pin Assignment  
(XC6372A, C6372B)  
PIN NUMBER  
XC6372A  
PIN NAME  
FUNCTION  
XC6372B  
1
2
3
1
2
V
SS  
Ground  
Output voltage monitor / IC internal power supply  
Switch  
VOUT  
Lx  
3
EXT  
External switch transistor drive  
(XC6372C, C6372D)  
PIN NUMBER  
PIN NAME  
FUNCTION  
XC6372C  
XC6372D  
5
2
4
5
2
V
SS  
Ground  
Output voltage monitor / IC internal power supply  
Switch  
VOUT  
Lx  
EXT  
CE  
3
1
4
3
1
External switch transistor drive  
Chip Enable  
NC  
No Connection  
(XC6372E, C6372F)  
PIN NUMBER  
PIN NAME  
FUNCTION  
XC6372E  
XC6372F  
5
2
4
5
2
V
SS  
Ground  
IC internal power supply  
Switch  
VDD  
Lx  
EXT  
3
1
4
3
1
External switch transistor drive  
Output voltage monitor  
No Connection  
VOUT  
NC  
216  
e-53  
Block Diagram  
XC6372A~XC6372D  
XC6372E and XC6372F  
(VOUT pin serves also as VDD.)  
VDD  
VDD  
LX  
LX  
VLX limiter  
Slow Start  
Vref  
Slow Start  
Vref  
VLX limiter  
VDD  
Buffer  
Buffer  
VOUT  
VOUT  
Phase comp  
Phase comp  
PWM/PFM Control  
OSC 50/100/180kHz  
PWM/PFM Control  
OSC 50/100/180kHz  
VSS  
EXT  
VSS  
EXT  
Chip Enable  
CE  
Note: 1. Built-in transistor type units use the Lx pin.  
External transistor type units use the EXT pin.  
1. The VDD pin is only used with the XC6372E and XC6372F .  
2. Built-in transistor type units use the Lx pin.  
Note:  
2. The CE pin is only used with the XC6372C and XC6372D.  
External transistor type units use the EXT pin.  
Ta=25  
UNITS  
:
Absolute Maximum Ratings  
PARAMETER  
OUT Input Voltage  
Lx pin Voltage  
Lx pin Current  
EXT pin Voltage  
EXT pin Current  
SYMBOL  
RATINGS  
V
V
OUT  
12  
12  
V
V
V
LX  
I
LX  
400  
mA  
V
V
EXT  
V
SS 0.3~VOUT+0.3  
I
EXT  
±50  
12  
mA  
V
CE Input Voltage  
V
V
CE  
DD  
V
DD Input Voltage  
12  
V
Continuous Total Power  
Dissipation  
P
d
500  
mW  
Operating Ambient  
Temperature  
Topr  
stg  
30~+80  
:
:
Storage Temperature  
T
40~+125  
217  
e-54  
Dual Mode [PWM/PFM] Step-up DC/DC Converters  
XC6372 Series  
Electrical Characteristics  
XC6372A501PR  
VOUT=5.0V,FOSC=100kH  
Z
Ta=25:  
PARAMETER  
Output Voltage  
SYMBOL  
CONDITIONS  
MIN  
4.875  
10  
TYP  
MAX  
UNITS  
VOUT  
5.000  
5.125  
V
V
Maximum Input Voltage  
VIN  
External Components Connected.  
Operation Start-up Voltage  
V
ST1  
0.90  
0.80  
V
V
I
OUT=1mA.  
No external components.  
Oscillation Start-up Voltage  
VST2  
Apply voltage to VOUT  
.
Lx:10kpull-up to 5V.  
I
IN  
12.8  
80.2  
25.7  
µA  
µA  
No Load Input Current  
Supply Current 1  
(Note2)  
V
IN=VOUT0.8, IOUT=0mA(Note1)  
Same as VST  
Apply output voltage 0.95 to VOUT.  
Same as VST  
Apply output voltage 1.1 to VOUT.  
2
.
I
I
DD  
1
2
133.8  
2.  
DD  
Supply Current 2  
8.2  
1.4  
16.5  
µA  
Same as IDD1. VLX=0.4V.  
RSWON  
2.4  
1.0  
L
X
Switch-On Resistance  
Leakage Current  
No external components. VOUT=VLX=10V.  
Same as IDD1.  
µA  
LX  
ILXL  
Oscillator Frequency(Note 3)  
85  
80  
100  
87  
115  
kHz  
FOSC  
Measuring of LX waveform.  
Same as IDD1.  
92  
25  
%
%
V
MAXDTY  
PFMDTY  
VLxLMT  
Maximum Duty Ratio  
Measuring of L  
X
waveform.  
Same as IDD1.  
PFM Duty Ratio(Note 4)  
10  
17  
Measuring of L  
X
waveform.  
Same as IDD1.  
Apply output voltage to Lx.  
LX  
Limit Voltage  
0.7  
1.3  
Voltage required to produce FOSC  
2.  
85  
%
Efficiency  
EFFI  
TSS  
4.0  
10.0  
20.0  
ms  
Slow-Start Time  
Measuring conditions: Unless otherwise specified,VIN=VOUT0.6, IOUT=50mA. See Typical Application Circuits, Fig.1.  
1. The Schottky diode (SD) must be type MA735, with reverse current (I )<1.0µA at reverse voltage (V )=10.0V  
R
R
Note:  
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.  
4. When PFM operates.  
XC6372B501PR  
VOUT=5.0V,FOSC=100kH  
Z
Ta=25:  
PARAMETER  
Output Voltage  
CONDITIONS  
MIN  
4.875  
10  
TYP  
MAX  
UNITS  
SYMBOL  
VOUT  
5.000  
5.125  
V
V
Maximum Input Voltage  
VIN  
External Components Connected.  
Operation Start-up Voltage  
V
ST1  
0.90  
0.80  
66.8  
V
V
I
OUT=1mA.  
No external components.  
Apply voltage to VOUT.  
Oscillation Start-up Voltage  
VST2  
Supply Current 1  
(Note1)  
Same as VST  
2.  
I
I
DD  
1
40.0  
8.2  
µA  
Apply output voltage 0.95 to VOUT.  
Same as VST  
2.  
Supply Current 2  
DD  
2
16.5  
µA  
Apply output voltage 1.1 to VOUT.  
Same as IDD1. VEXT= 0.4V.  
EXT "High" On Resistance  
EXT "Low" On Resistance  
REXTH  
REXTL  
FOSC  
37.5  
30  
62.5  
50  
Same as IDD1. VEXT=0.4V.  
Oscillator Frequency  
(Note 2)  
Same as IDD1.  
Measuring of EXT waveform.  
85  
80  
10  
100  
87  
115  
92  
kHz  
%
Same as IDD1.  
Measuring of EXT waveform.  
MAXDTY  
Maximum Duty Ratio  
PFM Duty Ratio  
(Note 3)  
Same as IDD1.  
Measuring of EXT waveform.  
17  
25  
%
PFMDTY  
EFFI  
TSS  
85  
%
Efficiency  
ms  
Slow-Start Time  
4.0  
10.0  
20.0  
Measuring conditions: Unless otherwise specified,VIN=VOUT0.6, IOUT=50mA. See Typical Application Circuits, Fig.2.  
1. "Supply Current 1" is the supply current while the oscillator is continuously oscillating. In actual operation the oscillator periodically operates which results  
Note:  
in less average power consumption.  
2. When PWM operates.  
3. When PFM operates.  
218  
e-55  
Electrical Characteristics  
XC6372C501PR  
VOUT=5.0V,FOSC=100kH  
Z
Ta=25:  
PARAMETER  
Output Voltage  
SYMBOL  
CONDITIONS  
MIN  
TYP  
MAX  
UNITS  
V
VOUT  
4.875  
5.000  
5.125  
V
IN  
10  
V
V
Maximum Input Voltage  
External Components Connected.  
VST1  
0.90  
0.80  
Operation Start-up Voltage  
I
OUT=1mA.  
No external components.  
Apply voltage to VOUT.  
VST2  
Oscillation Start-up Voltage  
V
Lx: 10k pull-up to 5V.  
I
IN  
No Load Input Current  
V
IN=VOUT0.8, IOUT=0mA(Note1)  
12.8  
80.2  
25.7  
µA  
µA  
Supply Current 1  
(Note2)  
Same as VST  
2.  
I
I
DD  
1
2
133.8  
Apply output voltage 0.95 to VOUT  
.
Same as VST  
2.  
8.2  
1.4  
16.5  
µA  
DD  
Supply Current 2  
Apply output voltage 1.1 to VOUT  
.
RSWON  
Same as IDD1. VLX=0.4V.  
2.4  
1.0  
LX Switch-On Resistance  
LX Leakage Current  
I
LXL  
No external components. VOUT=VL  
X=10V.  
µA  
Same as IDD1.  
85  
80  
10  
100  
87  
115  
kHz  
Oscillator Frequency(Note 3)  
FOSC  
Measuring of Lx waveform.  
Same as IDD1.  
Measuring of Lx waveform.  
92  
%
MAXDTY  
PFMDTY  
Maximum Duty Ratio  
Same as IDD1.  
Measuring of Lx waveform.  
25  
%
µA  
V
17  
PFM Duty Ratio(Note 4)  
Stand-by Current  
I
STB  
Same as IDD1.  
Same as IDD1.  
0.5  
CE"High" Voltage  
CE"Low" Voltage  
VCEH  
0.75  
Same as IDD1.  
0.20  
0.25  
V
VCEL  
Same as IDD1.VCE=VOUT0.95  
µA  
µA  
V
CE"High" Current  
CE"Low" Current  
ICEH  
0.25  
I
CEL  
Same as IDD1.VCE=0V.  
LX  
Limit Voltage  
0.7  
4.0  
1.3  
VLXLMT  
Same as IDD1. Apply output voltage to Lx.  
Voltage required to produce FOSC2.  
Efficiency  
EFFI  
TSS  
85  
%
Slow-Start Time  
10.0  
20.0  
ms  
Measuring conditions: Unless otherwise specified, connect CE to VOUT, VIN=VOUT0.6, IOUT=50mA. See Typical Application Circuits, Fig.3.  
Note  
:
1. The Schottky diode (SD) must be type MA735, with reverse current (IR) < 1.0µA at reverse voltage (VR) =10.0V  
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 comsumption. The current actually provided by an external VIN source is represented by "No-Load Input  
Current (IIN)".  
3. When PWM operates.  
4. When PFM operates.  
219  
e- 56  
Dual Mode [PWM/PFM] Step-up DC/DC Converters  
XC6372 Series  
Electrical Characteristics  
Ta=25  
:
XC6372D501PR  
PARAMETER  
V
OUT=5.0V,FOSC=100kH  
Z
SYMBOL  
CONDITIONS  
MIN  
TYP  
MAX  
UNITS  
V
VOUT  
Output Voltage  
4.875  
5.000  
5.125  
Maximum Input Voltage  
V
IN  
10  
V
V
External  
VST1  
0.90  
0.80  
Operation Start-up Voltage  
Components Connected. IOUT=1mA.  
No external components.  
Apply voltage to VOUT  
V
Oscillation Start-up Voltage  
VST2  
.
Supply Current 1  
(Note1)  
Same as VST2.  
I
I
DD  
1
66.8  
16.5  
µA  
µA  
40.0  
8.2  
Apply output voltage  
0.95 to VOUT.  
Same as VST2.  
Supply Current 2  
DD2  
Apply output voltage 1.1 to VOUT.  
Same as IDD1. VEXT= 0.4V  
Same as IDD1. VEXT=0.4V  
REXTH  
REXTL  
FOSC  
62.5  
50  
EXT"High" On Resistance  
EXT"Low" On Resistance  
37.5  
30  
Same as IDD1.  
115  
kHz  
85  
100  
Oscillator Frequency (Note2)  
Maximum Duty Ratio  
Measuring of EXT waveform.  
Same as IDD1.  
MAXDTY  
PFMDTY  
92  
%
80  
10  
87  
17  
Measuring of EXT waveform.  
Same as IDD1.  
25  
%
PFM Duty Ratio (Note3)  
Stand-by Current  
Measuring of EXT waveform.  
µA  
0.5  
Same as IDD1.  
Same as IDD1.  
I
STB  
0.75  
V
V
CE"High" Voltage  
VCEH  
Same as IDD1.  
0.20  
0.25  
CE"Low" Voltage  
VCEL  
Same as IDD1.VCE=VOUT0.95.  
CE"High" Current  
CE"Low" Current  
Efficiency  
I
CEH  
CEL  
µA  
µA  
%
0.25  
Same as IDD1.VCE=0V.  
I
EFFI  
TSS  
85  
Slow-Start Time  
ms  
4.0  
10.0  
20.0  
Measuring conditions: Unless otherwise specified, connect CE to VOUT, VIN=VOUT0.6, IOUT=50mA See Typical Application Circuits,Fig.4.  
Note  
:
1. "Supply Current 1" is the current while the oscillator is continuously oscillating. In an actual operation the oscillator periodically operates which  
results in less average power consumption.  
2. When PWM operates.  
3. When PFM operates.  
220  
e-57  
Electrical Characteristics  
Ta=25  
:
V
OUT=5.0V,FOSC=100kH  
Z
XC6372E501PR  
PARAMETER  
SYMBOL  
CONDITIONS  
MIN  
TYP  
MAX UNITS  
V
OUT  
Output Voltage  
48.75 5.000 5.125  
V
V
V
V
IN  
Maximum Input Voltage  
10  
V
ST1  
Operation Start-up Voltage  
0.90  
External Components Connected, IOUT=1mA.  
No external components. Apply voltage to VOUT.  
V
ST2  
Oscillation Start-up Voltage  
0.80  
V
V
IN=VOUT0.8,IOUT=0mA(Note1)  
I
IN  
No Load Input Voltage  
Supply Current 1(Note2)  
12.8  
25.7  
µA  
µA  
Same as VST2.  
80.2 133.8  
I
I
DD  
1
2
Apply output voltage  
0.95 to VOUT.  
Same as VST2.  
DD  
8.2  
1.4  
16.5  
µA  
Supply Current 2  
Apply output voltage  
1.1 to VOUT  
.
Same as IDD1. VOUT=VLX=0.4V.  
RSWON  
2.4  
1.0  
Lx Switch-On Resistance  
Lx Leakage Current  
I
LXL  
µA  
No external components. VOUT=VLX=10V.  
Same as IDD1.  
Oscillator Frequency(Note 3)  
FOSC  
85  
80  
100  
87  
115  
92  
kHz  
%
Measuring of Lx waveform.  
Same as IDD1.  
Measuring of Lx waveform.  
Maximum Duty Ratio  
MAXDTY  
Same as IDD1.  
PFMDTY  
PFM Duty Ratio(Note 4)  
Lx Limit Voltage  
10  
17  
25  
%
V
Measuring of Lx waveform.  
Same as IDD1 Apply output  
voltage to Lx.  
VLXLMT  
1.3  
0.7  
Voltage required to produce FOSC  
2.  
Efficiency  
EFFI  
TSS  
85  
%
4.0  
10.0  
20.0  
ms  
Slow-Start Time  
Measuring conditions: Unless otherwise specified, connect VDD to VOUT. VIN=VOUT0.6, IOUT=50mA. See Typical Application Circuits,Fig.5.  
Note:  
1. The Schottky diode (SD) must be type MA735, with reverse current (IR)<1.0µA at reverse voltage (VR)=10.0V  
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.  
4. When PFM operates.  
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.  
XC6372F501PR  
V
OUT=5.0V,FOSC=100kH  
Z
Ta=25:  
PARAMETER  
Output Voltage  
CONDITIONS  
MIN  
TYP  
MAX UNITS  
SYMBOL  
V
OUT  
IN  
48.75 5.000 5.125  
V
V
V
10  
Maximum Input Voltage  
V
Operation Start-up Voltage  
VST  
1
External Components Connected. IOUT=1mA.  
No external components.  
0.90  
0.80  
V
Oscillation Start-up Voltage  
Supply Current 1(Note1)  
V
ST  
2
1
Apply voltage to VOUT  
.
Same as VST Apply output  
2.  
I
I
DD  
DD  
40.0  
8.2  
66.8  
16.5  
62.5  
µA  
µA  
voltage 0.95 to VOUT.  
Same as VST Apply output  
2.  
Supply Current 2  
2
voltage 1.1 to VOUT  
.
EXT "High" On Resistance  
REXTH  
REXTL  
FOSC  
Same as IDD1. VEXT=VOUT 0.4V  
Same as IDD1. VEXT=0.4V  
37.5  
EXT "Low" On Resistance  
Oscillator Frequency(Note2)  
30  
50  
Same as IDD1. Measuring of EXT waveform.  
85  
80  
100  
115  
kHz  
87  
17  
92  
25  
%
%
Maximum Duty Ratio  
Same as IDD1. Measuring of EXT waveform.  
Same as IDD1. Measuring of EXT waveform.  
MAXDTY  
PFMDTY  
10  
PFM Duty Ratio(Note3)  
EFFI  
TSS  
Efficiency  
85  
%
4.0  
10.0  
20.0  
ms  
Slow-Start Time  
Measuring conditions: Unless otherwise specified,connect VDD to VOUT,VIN=VOUT0.6, IOUT=50mA. See Typical Application Circuits,Fig.6.  
Note:  
1. "Supply Current 1" is the supply current while the oscillator is continuously oscillating. In an actual operation the oscillator periodically operates which results  
in less average power consumption.  
2. When PWM operates.  
3. When PFM operates.  
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.  
221  
e-58  
Dual Mode [PWM/PFM] Step-up DC/DC Converters  
XC6372 Series  
Typical Application Circuits  
SD  
SD  
V
OUT  
VOUT  
L
L
Tr  
VIN  
VIN  
+
+
SOT-89  
SOT-89  
CL  
CL  
(TOP VIEW)  
(TOP VIEW)  
CB  
RB  
1
2
3
1
2
3
GND  
GND  
L:  
100µH (SUMIDA, CD-54)  
L:  
47µH (SUMIDA, CD-54)  
SD: MA735 (Schottky diode; MATSUSHITA)  
SD: MA735 (Schottky diode; MATSUSHITA)  
CL: 16V 47µF (Tantalum capacitor, NICHICON, F93)  
CL: 16V 47µF (Tantalum capacitor, NICHICON, F93)  
RB: 1k, CB:3300pF (FOSC=100kHz)  
Tr: 2SC3279, 2SD1628G  
[Fig-1] XC6372A Application  
[Fig-2] XC6372B Application  
CE  
CE  
SD  
SD  
V
OUT  
VOUT  
L
L
3
2
1
3
2
1
Tr  
VIN  
VIN  
+
+
(TOP VIEW)  
SOT-89-5  
(TOP VIEW)  
SOT-89-5  
CL  
CL  
CB  
RB  
4
5
4
5
GND  
GND  
L:  
100µH (SUMIDA, CD-54)  
L:  
47µH (SUMIDA, CD-54)  
SD: MA735 (Schottky diode; MATSUSHITA)  
SD: MA735 (Schottky diode; MATSUSHITA)  
CL: 16V 47µF (Tantalum capacitor, NICHICON, F93)  
CL: 16V 47µF(Tantalum capacitor, NICHICON, F93)  
RB: 1k, CB:3300pF (FOSC=100kHz)  
Tr: 2SC3279, 2SD1628G  
[Fig-3] XC6372C Application  
[Fig-4] XC6372D Application  
222  
e-59  
SD  
SD  
V
OUT  
V
OUT  
L
L
3
2
1
3
2
1
Tr  
(TOP VIEW)  
SOT-89-5  
(TOP VIEW)  
SOT-89-5  
VIN  
VDD  
VIN  
VDD  
+
+
CL  
CL  
CB  
RB  
4
5
4
5
GND  
GND  
L:  
100µH (SUMIDA, CD-54)  
L:  
SD: MA735 (Schottky diode; MATSUSHITA)  
CL: 16V 47µF (Tantalum capacitor, NICHICON, F93)  
R: 1k, CB:3300pF (FOSC=100kHz)  
Tr: 2SC3279, 2SD1628G  
47µH (SUMIDA, CD-54)  
SD: MA735 (Schottky diode; MATSUSHITA)  
CL: 16V 47µF (Tantalum capacitor, NICHICON, F93)  
[Fig-5] XC6372E Application  
[Fig-6] XC6372F Application  
223  
e-60  
Dual Mode [PWM/PFM] Step-up DC/DC Converters  
XC6372 Series  
(1)OUTPUT VOLTAGE vs. OUTPUT CURRENT  
(2)EFFICIENCY vs. OUTPUT CURRENT  
XC6372A301  
XC6372A301  
L=100µH,C=47µF(Tantalum)  
L=100µH,C=47µF(Tantalum)  
3.1  
100  
80  
2.0V  
2.9 VIN=1.0V  
2.0V  
60  
1.5V  
1.5V  
40  
20  
0
VIN=1.0V  
2.7  
2.5  
0
40  
80  
120 160 200  
0
40  
80  
120 160 200  
OUTPUT CURRENT:IOUT(mA)  
OUTPUT CURRENT:IOUT(mA)  
(3)NO LAOD INPUT CURENT vs. INPUT VOLTAGE  
XC6372A301  
(4)RIPPLE VOLTAGE vs. OUTPUT CURRENT  
XC6372A301  
L=100µH,C=47µF(Tantalum)  
L=100µH,C=47µF(Tantalum)  
200  
100  
80  
150  
100  
50  
60  
40  
10  
0
2.0V  
1.5V  
VIN=1.0V  
0
1.0  
1.2  
1.4  
1.6  
1.8  
2.0  
0
40  
80  
120 160 200  
)
INPUT VOLTAGE:VIN(V  
OUTPUT CURRENT:IOUT(mA)  
224  
e-61  

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