XC9503 Series
ETR0703_001
2ch.Step-Down DC/DC Controller ICs
☆GO-Compatible
■ GENERAL DESCRIPTION
XC9503 series are PWM controlled, PWM/PFM automatic switching controlled, multi-functional, 2 channel step-down DC/DC
controller ICs. Since the series has a built-in 0.9V reference voltage (accuracy ±2%), 0.9V to 6.0V can be set using external
components.
With a 300kHz frequency, the size of the external components can be reduced. Switching frequencies of 180kHz & 500kHz
are also available as custom-designed products.
The control of the XC9503 series can be switched between PWM control and PWM/PFM automatic switching control using
external signals. Control switches from PWM to PFM during light loads when automatic switching is selected and the series is
highly efficient from light loads through to large output currents. Noise is easily reduced with PWM control since the frequency
is fixed. The series gives freedom to select control suited to the application.
Soft-start time is internally set to 10msec and offers protection against in-rush currents when the power is switched on and
also protects against voltage overshoot.
■APPLICATIONS
■FEATURES
●PDAs
2 ch DC/DC Controller (Step-Down & Down)
Input Voltage Range
: 2.0V ~ 10V
Power Supply Voltage Range : 2.0V ~ 10V
Output Voltage Range
: 0.9V ~ 6.0V (set by FB pins)
Oscillation Frequency
: 300kHz (±15%)
(180kHz, 500kHz custom)
Maximum Duty Cycle
: 100%
Control Method:
: PWM or PWM/PFM Selectable
Output Current
: More than 1000mA
(VIN=5.0V, VOUT=3.3V)
High Efficiency
: 92% (TPY.)
Stand-By Function
: 3.0μA (MAX.)
Soft-Start Time
: 10 ms (internally set)
Package
: MSOP-10, USP-10
●Palmtop computers
●Digital cameras
●Various multi function power supplies
■TYPICAL APPLICATION CIRCUIT
<XC9503B093A VOUT①: 3.3V, VOUT②: 1.8V >
■TYPICAL PERFORMANCE
CHARACTERISTICS
●Efficiency vs. Output Current
1/32
XC9503 Series
■PIN CONFIGURATION
USP-10
(BOTTOM VIEW)
MSOP-10
(TOP VIEW)
■PIN ASSIGNMENT
PIN NUMBER
PIN NAME
FUNCTIONS
1
EXT 1
2
VDD
Supply Voltage
3
FB1
Channel 1: Output Voltage Monitor Feedback Pin <Threshold value: 0.9V. Output voltage
can be set freely by connecting split resistors between VOUT1 and Ground.>
4
PWM1
Channel 1: PWM/PFM Switching Pin <Control Output 1. PWM control when connected to
VDD, PWM / PFM auto switching when connected to Ground. >
5
EN1
Channel 1: Enable Pin <Connected to Ground when Output 1 is in stand-by mode.
Connected to VDD when Output 1 is active. EXT1 is high when in stand-by mode.>
6
EN2
Channel 2: Enable Pin <Connected to Ground when Output 2 is in stand-by mode.
Connected to VDD when Output 2 is active. EXT2/ is high when in stand-by mode.>
7
PWM2
Channel 2: PWM/PFM Switching Pin <Control Output 2. PWM control when connected to
VDD, PWM / PFM auto switching when connected to Ground.>
8
FB2
Channel 2: Output Voltage Monitor Feedback Pin <Threshold value: 0.9V. Output voltage
can be set freely by connecting split resistors between VOUT2 and Ground.>
9
GND
Ground
10
EXT2
Channel 2: External Transistor Drive Pin <Connected to P-ch Power MOSFET Gate>
Channel 1: External Transistor Drive Pin <Connected to P-ch Power MOSFET Gate>
■PRODUCT CLASSIFICATION
●Ordering Information
XC9503①②③④⑤⑥
DESIGNATOR
①
②
2/32
③
DESCRIPTION
Type of DC/DC Controller
SYMBOL
B
DESCRIPTION
: Standard type (10 Pin)
Output Voltage
09
: FB products→②=0, ③=9 fixed
2
3
5
A
D
R
L
: 180kHz (custom)
: 300kHz
: 500kHz (custom)
: MSOP-10
: USP-10
: Embossed tape, standard feed
: Embossed tape, reverse feed
④
Oscillation Frequency
⑤
Package
⑥
Device Orientation
XC9503
Series
■BLOCK DIAGRAM
■ABSOLUTE MAXIMUM RATINGS
Ta=25℃
PARAMETER
SYMBOL
RATINGS
UNITS
VDD Pin Voltage
VDD
- 0.3 ~ 12
V
FB1, 2 Pin Voltage
VFB
- 0.3 ~ 12
V
EN1, 2 Pin Voltage
VEN
- 0.3 ~ 12
V
PWM1, 2 Pin Voltage
VPWM
- 0.3 ~ 12
V
EXT1, 2 Pin Voltage
VEXT
- 0.3 ~ VDD + 0.3
V
EXT1, 2 Pin Current
IEXT
± 100
mA
Power Dissipation
MSOP-10
USP-10
Pd
150
150
mW
Operating Temperature Range
Topr
- 40 ~ + 85
℃
Storage Temperature Range
Tstg
- 55 ~ + 125
℃
Note: Voltage is all ground standardized.
3/32
XC9503 Series
■ELECTRICAL CHARACTERISTICS
XC9503B092A
Ta=25℃
Common Characteristics
PARAMETER
Supply Voltage
Maximum Input Voltage
SYMBOL
VDD
VIN
Output Voltage Range (* 1)
VOUTSET
Supply Current 1
IDD1
Supply Current 1-1
IDD1-1
Supply Current 1-2
IDD1-2
Supply Current 2
Stand-by Current
Switching Frequency
EN1, 2 "High" Voltage
EN1, 2 "Low" Voltage
EN1, 2 "High" Current
EN1, 2 "Low" Current
PWM1, 2 "High" Current
PWM1, 2 "Low" Current
FB1, 2 "High" Current
FB1, 2 "Low" Current
IDD2
ISTB
FOSC
VENH
VENL
IENH
IENL
IPWMH
IPWML
IFBH
VFBL
CONDITIONS
VIN≧2.0V, IOUT1, 2=1mA
VOUT1
VOUT2
FB1, 2=0V
EN1=3.0V, EN2=0V, FB1=0V
EN2=3.0V, EN1=0V, FB2=0V
FB1=0V, FB2=1.0V
FB1=1.0V, FB2=0V
FB1, 2=1.0V
Same as IDD1, EN1=EN2=0V
Same as IDD1
FB1, 2=0V
FB1, 2=0V
EN1, 2=3.0V
EN1, 2=0V, FB1, 2=3.0V
FB1, 2=3.0V, PWM=3.0V
FB1, 2=3.0V, PWM=0V
FB1, 2=3.0V
FB1, 2=1.0V
MIN.
2.0
10.0
0.9
0.9
-
TYP.
60
MAX.
10.0
10.0
10.0
120
UNITS
V
V
V
V
μA
CIRCUIT
①
①
-
50
110
μA
②
-
60
130
μA
②
153
0.65
-
60
1.0
180
-
140
3.0
207
0.20
0.50
-0.50
0.50
-0.50
0.50
-0.50
μA
μA
kHz
V
V
μA
μA
μA
μA
μA
μA
②
②
②
②
②
②
②
②
②
②
②
MIN.
0.882
100
22
TYP.
0.900
30
MAX.
0.918
2.0
0
38
UNITS
V
V
%
%
%
CIRCUIT
③
①
②
②
④
-
92
-
%
④
5.0
0.65
-
10.0
28
22
-
20.0
47
30
0.20
ms
Ω
Ω
V
V
④
⑤
⑤
④
④
①
②
Unless otherwise stated, VDD=3.0V, PWM1, 2=3.0V, EN1, 2 =3.0V
Step-Down Controller
Output 1 Characteristics
PARAMETER
FB1 Voltage
Minimum Operation Voltage
Maximum Duty Ratio 1
Minimum Duty Ratio1
PFM Duty Ratio 1
SYMBOL
VFB1
VINmin1
MAXDTY1
MINDTY1
PFMDTY1
Efficiency1 (* 4)
EFFI1
Soft-Start Time1
EXT1 "High" ON Resistance
EXT1 "Low" ON Resistance
PWM1 "High" Voltage
PWM1 "Low" Voltage
TSS1
REXTBH1
REXTBL1
VPWMH1
VPWML1
CONDITIONS
VIN=3.0V, IOUT1=10mA
Same as IDD1
Same as IDD2
No Load, VPWM1=0V
IOUT1=250mA
P-ch MOSFET: XP162A12A6P
VOUT1×0.95V, EN1=0V→0.65V
EN1=0, EXT1=VDD-0.4V
FB2=0V, EXT1=0.4V
No Load
No Load
Unless otherwise stated, VDD=EN1=PWM1=3.0V, PWM2=EN2=GND, EXT2=OPEN, FB2=OPEN, VIN=5.0V
Output 2 Characteristics
Step-Down Controller
PARAMETER
SYMBOL
FB2 Voltage
Minimum Operating Voltage
Maximum Duty Ratio 2
Minimum Duty Ratio 2
PFM Duty Ratio 2
VFB2
VINmin2
MAXDTY2
MINDTY2
PFMDTY2
Efficiency 1 (* 2)
EFFI2
Soft-Start Time 1
EXT1 "High" ON Resistance
EXT1 "Low" ON Resistance
PWM 2 "High" Voltage
PWM 2 "Low" Voltage
TSS2
REXTBH2
REXTBL2
VPWMH2
VPWML2
CONDITIONS
VIN=3.0V, IOUT2=10mA
Same as IDD1
Same as IDD2
No Load, VPWM2=0V
IOUT2=250mA
P-ch MOSFET: XP162A12A6P
VOUT2×0.95V, EN2=0V→0.65V
EN2=0, EXT2=VDD-0.4V
FB2=0V, EXT2=0.4V
No Load
No Load
MIN.
TYP.
MAX.
UNITS
0.882
100
22
0.900
30
0.918
2.0
0
38
V
V
%
%
%
CIRCUIT
⑥
①
②
②
⑦
-
92
-
%
⑦
5.0
0.65
-
10.0
28
22
-
20.0
47
30
0.20
ms
Ω
Ω
V
V
⑦
⑤
⑤
⑦
⑦
Unless otherwise stated, VDD=EN2=PWM2=3.0V, PWM1=EN1=GND, EXT1=OPEN, FB1=OPEN, VIN=5.0V
NOTE:
*1: Please be careful not to exceed the breakdown voltage level of the peripheral parts.
*2: EFFI={ [ (output voltage) × (output current) ] / [ (input voltage) × (input current) ] } × 100
4/32
XC9503
Series
■ELECTRICAL CHARACTERISTICS (Continued)
XC9503B093A
Common Characteristics
Ta=25℃
PARAMETER
SYMBOL
Supply Voltage
Maximum Input Voltage
VDD
VIN
Output Voltage Range (* 1)
VOUTSET
Supply Current 1
IDD1
Supply Current 1-1
IDD1-1
Supply Current 1-2
IDD1-2
Supply Current 2
Stand-by Current
Switching Frequency
EN1, 2 "High" Voltage
EN1, 2 "Low" Voltage
EN1, 2 "High" Current
EN1, 2 "Low" Current
PWM1, 2 "High" Current
PWM1, 2 "Low" Current
FB1, 2 "High" Current
FB1, 2 "Low" Current
IDD2
ISTB
FOSC
VENH
VENL
IENH
IENL
IPWMH
IPWML
IFBH
VFBL
CONDITIONS
VIN≧2.0V, IOUT1, 2=1mA
VOUT1
VOUT2
FB1, 2=0V
EN1=3.0V, EN2=0V, FB1=0V
EN2=3.0V, EN1=0V, FB2=0V
FB1=0V, FB2=1.0V
FB1=1.0V, FB2=0V
FB1, 2=1.0V
Same as IDD1, EN1=EN2=0V
Same as IDD1
FB1, 2=0V
FB1, 2=0V
EN1, 2=3.0V
EN1, 2=0V, FB1, 2=3.0V
FB1, 2=3.0V, PWM=3.0V
FB1, 2=3.0V, PWM=0V
FB1, 2=3.0V
FB1, 2=1.0V
MIN.
TYP.
MAX.
UNITS
CIRCUIT
2.0
10.0
0.9
0.9
-
70
10.0
10.0
10.0
140
V
V
V
V
μA
①
①
-
60
120
μA
②
-
70
150
μA
②
255
0.65
-
80
1.0
300
-
150
3.0
345
0.20
0.50
-0.50
0.50
-0.50
0.50
-0.50
μA
μA
kHz
V
V
μA
μA
μA
μA
μA
μA
②
②
②
②
②
②
②
②
②
②
②
①
②
Unless otherwise stated, VDD=3.0V, PWM1, 2=3.0V, EN1, 2 =3.0V
Step-Down Controller
Output 1 Characteristics
PARAMETER
SYMBOL
FB 1 Voltage
Minimum Operating Voltage
Maximum Duty Ratio 1
Minimum Duty Ratio 1
PFM Duty Ratio 1
VFB1
VINmin1
MAXDTY1
MINDTY1
PFMDTY1
CONDITIONS
VIN=3.0V IOUT1=10mA
MIN.
TYP.
MAX.
UNITS
CIRCUIT
0.882
100
22
0.900
30
0.918
2.0
0
38
V
V
%
%
%
③
①
②
②
④
-
%
④
20.0
47
30
0.20
ms
Ω
Ω
V
V
④
⑤
⑤
④
④
Same as IDD1
Same as IDD2
No Load, VPWM1=0V
IOUT1=250mA
Efficiency1 (* 4)
EFFI1
92
P-ch MOSFET: XP162A12A6P
VOUT1×0.95V, EN1=0V→0.65V
5.0
10.0
Soft-Start Time 1
TSS1
EXT1 "High" ON Resistance
REXTBH1
EN1=0, EXT1=VDD-0.4V
28
EXT1 "Low" ON Resistance
REXTBL1
FB2=0V, EXT1=0.4V
22
PWM1 "High" Voltage
VPWMH1
No Load
0.65
PWM1 "Low" Voltage
No Load
VPWML1
Unless otherwise stated, VDD=EN1=PWM1=3.0V, PWM2=EN2=GND, EXT2=OPEN, FB2=OPEN, VIN=5.0V
Output 2 Characteristics
Step-Down Controller
PARAMETER
SYMBOL
FB 2 Voltage
Minimum Operating Voltage
Maximum Duty Ratio 2
Minimum Duty Ratio 2
PFM Duty Ratio 2
VFB2
VINmin2
MAXDTY2
MINDTY2
PFMDTY2
CONDITIONS
VIN=3.0V, IOUT2=10mA
MIN.
TYP.
MAX.
UNITS
CIRCUIT
0.882
100
22
0.900
30
0.918
2.0
0
38
V
V
%
%
%
⑥
①
②
②
⑦
-
%
⑦
20.0
47
30
0.20
ms
Ω
Ω
V
V
⑦
⑤
⑤
⑦
⑦
Same as IDD1
Same as IDD2
No Load, VPWM2=0V
IOUT2=250mA
Efficiency 1 (* 2)
EFFI2
92
P-ch MOSFET: XP162A12A6P
Soft-Start Time 1
TSS2
5.0
10.0
VOUT2×0.95V, EN2=0V→0.65V
EXT1 "High" ON Resistance
REXTBH2
EN2=0, EXT2=VDD-0.4V
28
EXT1 "Low" ON Resistance
REXTBL2
FB2=0V, EXT2=0.4V
22
PWM2 "High" Voltage
VPWMH2
No Load
0.65
PWM2 "Low" Voltage
VPWML2
No Load
Unless otherwise stated, VDD=EN2=PWM2=3.0V, PWM1=EN1=GND, EXT1=OPEN, FB1=OPEN, VIN=5.0V
NOTE:
*1: Please be careful not to exceed the breakdown voltage level of the peripheral parts.
*2: EFFI={ [ (output voltage) × (output current) ] / [ (input voltage) × (input current) ] } × 100
5/32
XC9503 Series
■ELECTRICAL CHARACTERISTICS (Continued)
XC9503B095A
Ta=25℃
Common Characteristics
PARAMETER
SYMBOL
Supply Voltage
Maximum Input Voltage
VDD
VIN
Output Voltage Range (* 1)
VOUTSET
Supply Current 1
IDD1
Supply Current 1-1
IDD1-1
Supply Current 1-2
IDD1-2
Supply Current 2
Stand-by Current
Switching Frequency
EN1, 2 "High" Voltage
EN1, 2 "Low" Voltage
EN1, 2 "High" Current
EN1, 2 "Low" Current
PWM1, 2 "High" Current
PWM1, 2 "Low" Current
FB1, 2 "High" Current
FB1, 2 "Low" Current
CONDITIONS
VIN≧2.0V, IOUT1, 2=1mA
VOUT1
VOUT2
FB1, 2=0V
EN1=3.0V, EN2=0V, FB1=0V
EN2=3.0V, EN1=0V, FB2=0V
FB1=0V, FB2=1.0V
FB1=1.0V, FB2=0V
FB1, 2=1.0V
Same as IDD1, EN1=EN2=0V
Same as IDD1
FB1, 2=0V
FB1, 2=0V
EN1, 2=3.0V
EN1, 2=0V, FB1, 2=3.0V
FB1, 2=3.0V, PWM=3.0V
FB1, 2=3.0V, PWM=0V
FB1, 2=3.0V
FB1, 2=1.0V
IDD2
ISTB
FOSC
VENH
VENL
IENH
IENL
IPWMH
IPWML
IFBH
VFBL
Unless otherwise stated, VDD=3.0V, PWM1, 2=3.0V, EN1, 2 =3.0V
TYP.
MAX.
UNITS
CIRCUIT
2.0
10.0
0.9
0.9
-
90
10.0
10.0
10.0
170
V
V
V
V
μA
①
①
-
80
150
μA
②
-
100
180
μA
②
425
0.65
-
100
1.0
500
-
190
3.0
575
0.20
0.50
-0.50
0.50
-0.50
0.50
-0.50
μA
μA
kHz
V
V
μA
μA
μA
μA
μA
μA
②
②
②
②
②
②
②
②
②
②
②
SYMBOL
VFB1
VINmin1
MAXDTY1
MINDTY1
PFMDTY1
CONDITIONS
VIN=3.0V, IOUT1=10mA
Output 2 Characteristics
MIN.
TYP.
MAX.
UNITS
0.900
30
0.918
2.0
0
38
V
V
%
%
%
CIRCUIT
③
①
②
②
④
-
%
④
20.0
47
30
0.20
ms
Ω
Ω
V
V
④
⑤
⑤
④
④
MAX.
0.918
2.0
0
38
UNITS
V
V
%
%
%
CIRCUIT
⑥
①
②
②
⑦
-
%
⑦
20.0
47
30
0.20
ms
Ω
Ω
V
V
⑦
⑤
⑤
⑦
⑦
Step-Down Controller
SYMBOL
VFB2
VINmin2
MAXDTY2
MINDTY2
PFMDTY2
CONDITIONS
VIN=3.0V, IOUT2=10mA
MIN.
0.882
100
22
TYP.
0.900
30
Same as IDD1
Same as IDD2
No Load, VPWM2=0V
IOUT2=250mA
91
Efficiency 1 (* 2)
EFFI2
P-ch MOSFET: XP162A12A6P
Soft-Start Time 1
TSS2
5.0
10.0
VOUT2×0.95V, EN2=0V→0.65V
EXT1 "High" ON Resistance
REXTBH2
EN2=0, EXT2=VDD-0.4V
28
EXT1 "Low" ON Resistance
REXTBL2
FB2=0V, EXT2=0.4V
22
PWM2 "High" Voltage
VPWMH2
No Load
0.65
PWM2 "Low" Voltage
VPWML2
No Load
Unless otherwise stated, VDD=EN2=PWM2=3.0V, PWM1=EN1=GND, EXT1=OPEN, FB1=OPEN, VIN=5.0V
NOTE:
*1 : Please be careful not to exceed the breakdown voltage level of the peripheral parts.
*2 : EFFI={ [ (output voltage) × (output current) ] / [ input voltage] × (input current) ] } × 100
6/32
②
0.882
100
22
Same as IDD1
Same as IDD2
No Load, VPWM1=0V
IOUT1=250mA
Efficiency1 (* 4)
EFFI1
91
P-ch MOSFET: XP162A12A6P
VOUT1×0.95V, EN1=0V→0.65V
5.0
10.0
Soft-Start Time 1
TSS1
EXT1 "High" ON Resistance
REXTBH1
EN1=0, EXT1=VDD-0.4V
28
EXT1 "Low" ON Resistance
REXTBL1
FB2=0V, EXT1=0.4V
22
PWM1 "High" Voltage
VPWMH1
No Load
0.65
PWM1 "Low" Voltage
No Load
VPWML1
Unless otherwise stated, VDD=EN1=PWM1=3.0V, PWM2=EN2=GND, EXT2=OPEN, FB2=OPEN, VIN=5.0V
PARAMETER
FB 2 Voltage
Minimum Operation Voltage
Maximum Duty Ratio 2
Minimum Duty Ratio 2
PFM Duty Ratio 2
①
Step-Down Controller
Output 1 Characteristics
PARAMETER
FB 1 Voltage
Minimum Operation Voltage
Maximum Duty Ratio 1
Minimum Duty Ratio 1
PFM Duty Ratio 1
MIN.
XC9503
Series
■OPERATIONAL EXPLANATION
The XC9503 series are multi-functional, 2 channel step-down DC/DC converter controller ICs with built-in high speed, low ON
resistance drivers.
<Error Amp. 1, 2>
The Error Amplifier is designed to monitor the output voltage and it compares the feedback voltage (FB) with the reference
voltage. In response to feedback of a voltage lower than the reference voltage, the output voltage of the error amp.
decreases.
<OSC Generator>
This circuit generates the switching frequency, which in turn generates the reference clock.
<Ramp Wave Generator 1, 2>
The ramp wave generator generates a saw-tooth waveform based on outputs from the phase shift generator.
<PWM Comparator 1, 2>
The PWM comparator compares outputs from the error amp. and saw-tooth waveform. When the voltage from the error
amp's output is low, the external switch will be set to ON.
<PWM/PFM Controller 1, 2>
This circuit generates PFM pulses.
Control can be switched between PWM control and PWM/PFM automatic switching control using external signals.
The PWM/PFM automatic switching mode is selected when the voltage of the PWM1 (2) pin is less than 0.2V, and the control
switches between PWM and PFM automatically depending on the load. As the PFM circuit generates pulses based on
outputs from the PWM comparator, shifting between modes occurs smoothly. PWM control mode is selected when the
voltage of the PWM1 (2) pin is more than 0.65V. Noise is easily reduced with PWM control since the switching frequency is
fixed.
Control suited to the application can easily be selected which is useful in audio applications, for example, where traditionally,
efficiencies have been sacrificed during stand-by as a result of using PWM control (due to the noise problems associated with
the PFM mode in stand-by).
<Vref with Soft Start 1, 2>
The reference voltage, Vref (FB pin voltage)=0.9V, is adjusted and fixed by laser trimming (for output voltage settings, please
refer to next page). To protect against inrush current, when the power is switched on, and also to protect against voltage
overshoot, soft-start time is set internally to 10ms. It should be noted, however, that this circuit does not protect the load
capacitor (CL) from inrush current. With the Vref voltage limited and depending upon the input to the error amps, the operation
maintains a balance between the two inputs of the error amps and controls the EXT pin's ON time so that it doesn't increase
more than is necessary.
<Chip Enable Function>
This function controls the operation and shutdown of the IC. When the voltage of the EN1 or EN2 pins is 0.2V or less, the
mode will be chip disable, the channel's operations will stop and the EXT pins will be kept at a high level (the external P-ch
MOSFET will be OFF). When both EN1 and EN2 are in a state of chip disable, current consumption will be no more than 3.0
μA. When the EN1 or EN2 pin's voltage is 0.65V or more, the mode will be chip enable and operations will recommence.
With soft-start, 95% of the set output voltage will be reached within 10mS (TYP.) from the moment of chip enable.
7/32
XC9503 Series
■OPERATIONAL EXPLANATION (Continued)
<Setting of Output Voltage>
Output voltage can be set by adding external split resistors. Output voltage is determined by the following equation, based
on the values of RFB11 (RFB21) and RFB12 (RFB22). The sum of RFB11 (RFB21) and RFB12 (RFB22) should normally be 1MΩor
less.
VOUT=0.9 ×(RFB11+RFB12) /RFB12
The value of CFB1 (CFB2), speed-up capacitor for phase compensation, should be fzfb= 1 / (2×π×CFB1×RFB11) which is
equal to 12kHz. Adjustments are required from 1kHz to 50kHz depending on the application, value of inductance (L), and
value of load capacity (CL).
[Example of Calculation]
When RFB11=200kΩ and RFB12=75kΩ, VOUT1=0.9×(200k+75k) / 75k=3.3V.
[Typical Example]
VOUT
RFB11
RFB12
CFB1
(V)
(kΩ)
(kΩ)
(pF)
1.0
30
270
430
1.5
220
330
62
1.8
220
220
62
2.0
330
270
39
2.2
390
270
33
The same method can be adopted for channel two also.
VOUT
(V)
2.5
2.7
3.0
3.3
5.0
[External Components]
Tr
:
SD :
L
:
CL1 :
* MOSFET
XP162A12A6P (P-ch Power MOSFET, TOREX)
Note: VGS breakdown voltage of this Tr. is 12V so
please be careful with the power supply voltage.
MA2Q737
(Schottky, MATSUSHITA)
CMS02
(Schottky, TOSHIBA)
10μH
(CDRH5D28, SUMIDA, FOSC = 500kHz)
22μH
(CDRH5D28, SUMIDA, FOSC = 300kHz)
22μH
(CDRH5D28, SUMIDA, FOSC = 180kHz)
16V, 47μF (Tantalum)
Increase capacity according to the equation below when the step-up
voltage ratio is large and output current is high.
C=(CL standard value)×(IOUT (mA) / 500mA×VOUT / VIN
Tr
:
RB :
CB
:
* PNP MOSFET
2SA1213 (SANYO)
500Ω ( Adjust in accordance with load & Tr.'s HFE.)
Set according to the equation below.
RB ≦ (VIN-0.7) × hFE / IC-REXTBH
2200pF (Ceramic)
Set according to the equation below.
CB1 ≦ (2π× RB × FOSC × 0.7)
The same components can be adopted for both channel 1 and channel 2.
8/32
RFB11
(kΩ)
390
360
560
200
82
RFB12
(kΩ)
220
180
240
75
18
CFB1
(pF)
33
33
24
62
160
XC9503
Series
■TEST CIRCUITS
Cir
cu it 1 ①
Circuit
Cir c uit 5⑤
Circuit
PN P
Tr 1
L1
V OUT 1
P NP
Tr2
1 EX T1
EX T2
L2
V OUT 2
1 E XT1
5 10Ω
N
R F B 11
10
A
R F B 21
C FB1
S BD 1
2 VD D
GND
9
S B D2
E XT2
GN D
9
3 FB1
FB 2
8
4 P WM 1
3 FB 1
4 PW M 1
FB 2
C IN
A
8
C L2
R L2
VE X T 1
1μ F
V PW M 1
V DD
P WM 2 7
5 E N1
V P WM 2
EN 2 6
R F B 22
V FB 1
E N2 6
V EN2
V E N1
Circuit ⑥
Pc h
M O SFE T2
1 E XT1
A
A
A
E X T2
G ND
9
3 FB1
FB2
8
5 E N1
A
V IN
P WM 2 7
EN 2 6
A
A
OS C
A
1 EX T1
V P W M1
V E N1
VE N 2
V P WM 2
VF B 2
GN D
9
FB 2
8
SBD2
V
C L2
RL
P WM 2 7
EN2 6
Cir c uit 7⑦
Circuit
Circuit ③
V OU T 1
L1
Pch
M OS FE T2
Pch
M OS FE T1
A
1 EX T1
E XT2
10
S BD 1
CL1
V IN
C IN
2 VD D
GN D
9
3 FB 1
FB 2
8
5 EN 1
VOU T 2
1 EX T1
E XT2
2 VD D
GN D
9
FB 2
8
4 PW M 1
PW M 2 7
A
SB D 2
VIN
3 FB 1
RL
4 PW M 1
L2
A
C IN
A
Cir
cu it 4
Circuit
10
3 FB 1
5 EN 1
Cir cu it 3
E XT2
2 VD D
4 PW M 1
VF B 1
VOU T 2
A
1 μF
V DD
L2
10
2 V DD
4 P WM 1
A
V
V F B2
Cir c uit 6
Cir
cu it 2 ②
Circuit
OS C
VE X T 2
PW M 2 7
RF B 12
5 EN 1
10
2 V DD
CF B 2
1 μF
CL1
RL1
C IN
2 20 0pF
5 10Ω
22 00pF
VI
10
62pF
200 k Ω
V
C L2
RL
PW M 2 7
75 k Ω
5 EN 1
E N2 6
E N2 6
④
L1
VOU T 1
Pch
M OS FE T1
A
A
20 0 k Ω
C L1
1 EX T1
62 p F
V
S B D1
E XT2
10
V IN
C IN
2 VD D
GN D
9
3 FB 1
FB 2
8
RL
75 k Ω
4 PW M 1
5 EN 1
P WM 2 7
E N2 6
9/32
XC9503 Series
■EXTERNAL COMPONENTS USED FOR TEST CIRCUITS
Circuit ①
L1, L2:
SD1, SD2:
CL1, CL2:
CIN:
PNP Tr1:
RFB:
CFB:
22μH (CDRH5D28, SUMIDA)
15μH (CDRH5D28, SUMIDA)
10μH (CDRH5D28, SUMIDA)
CRS02 (Schottky diode, TOSHIBA)
EC10QS06 (Schottky diode, NIHON INTER)
16MCE476MD2 (Tantalum, NIHON CHEMICON)
16MCE476MD2 (Tantalum, NIHON CHEMICON)
2SA1213 (TOSHIBA)
Please use by the conditions as below:
RFB11 + RFB12 < 1MΩ
RFB21 + RFB22 < 1MΩ
RFB11 / RFB12 = (Setting output voltage / 0.9) - 1
VOUT2= (0.9 – VOUT1) x (RFB21/RFB22) + 0.9V
Please adjust as below:
fxfb=1/(2 x π x CFB1 x RFB11) = 1kHz ~ 50kHz (12kHz usual)
fxfb=1/(2 x π x CFB2 x RFB21) = 1kHz ~ 50kHz (12kHz usual)
Circuit ③
L1:
SD1:
CL1:
CIN:
P-ch MOSFET1:
22μH (CDRH5D28, SUMIDA)
MA2Q737 (Schottky diode, MATSUSHITA)
16MCE476MD2 (Tantalum, NIHON CHEMICON)
16MCE476MD2 (Tantalum, NIHON CHEMICON)
XP162A12A6P (TOREX)
Circuit ④
L1:
SD1:
CL1:
CIN:
P-ch MOSFET1:
22μH (CDRH5D28, SUMIDA)
15μH (CDRH5D28, SUMIDA)
10μH (CDRH5D28, SUMIDA)
MA2Q737 (Schottky diode, MATSUSHITA)
16MCE476MD2 (Tantalum, NIHON CHEMICON)
16MCE476MD2 (Tantalum, NIHON CHEMICON)
XP162A12A6P (TOREX)
Circuit ⑥
L1:
SD1:
CL1:
CIN:
P-ch MOSFET2:
22μH (CDRH5D28, SUMIDA)
MA2Q737 (Schottky diode, MATSUSHITA)
16MCE476MD2 (Tantalum, NIHON CHEMICON)
16MCE476MD2 (Tantalum, NIHON CHEMICON)
XP162A12A6P (TOREX)
Circuit ⑦
L2:
22μH (CDRH5D28, SUMIDA)
15μH (CDRH5D28, SUMIDA)
10μH (CDRH5D28, SUMIDA)
MA2Q737 (Schottky diode, MATSUSHITA)
16MCE476MD2 (Tantalum, NIHON CHEMICON)
16MCE476MD2 (Tantalum, NIHON CHEMICON)
XP162A12A6P (TOREX)
SD2:
CL2:
CIN:
P-ch MOSFET2:
10/32
: XC9503B092A
: XC9503B093A
: XC9503B095A
: XC9503B092A
: XC9503B093A
: XC9503B095A
: XC9503B092A
: XC9503B093A
: XC9503B095A
XC9503
Series
■NOTES ON USE
1. Checking for Intermittent Oscillation
The XC9503 series is subject to intermittent oscillation in the proximity of the maximum duty if the step-down ratio is low
(e.g., from 4.2 V to 3.3 V) or a heavy load is applied where the duty ratio becomes high. Check waveforms at EXT under
your operating conditions.
A remedy for this problem is to raise the inductance of coil L or increase the load capacitance
CL.
2. PWM/PFM Automatic Switching
If PWM/PFM automatic switching control is selected and the step-down ratio is low (e.g, from 4.5V to 5.0V) or high (e.g.,
from 10 V to 1.0 V), the control mode remains in PFM setting over the whole load range, since the duty ratio under
continuous-duty condition is smaller than the PFM duty ratio of the XC9503 series.
The output voltage's ripple voltage
becomes substantially high under heavy load conditions, with the XC9503 series appearing to be producing an abnormal
oscillation.
setting.
If this operation becomes a concern, set pins PWM1 and PWM2 to High to set the control mode to PWM
For use under the above-mentioned condition, measured data of PWM/PFM automatic switching control shown
on the data sheets are available up to IOUT = 100 mA.
3. Ratings
Use the XC9503 series and external components within the limits of their ratings.
11/32
XC9503 Series
■TYPICAL PERFORMANCE CHARACTERISTICS
(1) Output Voltage vs. Output Current
FOCS=300kHz, VOUT1, 2=1.0V
FOSC=300kHz, VOUT1, 2=1.0V
L=22μH(CDRH5D28), CL=94μF(Tantalum)
SD:CMS02, Tr:XP162A12A6P
1.2
PWM Control
Output Voltage1, 2 V OUT1, 2 (V)
Output Voltage1, 2 V OUT1, 2 (V)
1.2
1.1
1.0
0.9
VIN=2.7V 3.3V 4.2V 5.0V
6.0V 8.0V 10V
0.8
0.7
L=22μH(CDRH5D28), CL=94μF(Tantalum)
SD:CMS02, Tr:XP162A12A6P
PWM/PFM Switching Control
1.1
1.0
0.9
4.2V, 6.0V 8.0V 10.0V
0.8
0.7
0.1
1
10
100
1000
0.1
Output Current1, 2 IOUT1, 2 (mA)
100
2.0
PWM/PFM Switching Control
Output Voltage1, 2 V OUT1, 2 (V)
PWM Control
1.9
1.8
1.7
VIN= 2.7V 3.3V 4.2V
5.0V 6.0V 8.0V 10V
1.6
1.9
6.0V 8.0V 10.0V
1.8
1.7
VIN= 2.7V 3.3V 4.2V 5.0V
1.6
1.5
1.5
0.1
1
10
100
0.1
1000
L=22μH(CDRH5D28), CL=94μ F(Tantalum)
SD:CMS02, Tr:XP162A12A6P
2.7
Output Voltage1, 2 V OUT1, 2 (V)
PWM Control
10.0V
2.5
2.4
VIN= 2.7V 3.3V 4.2V
5.0V 6.0V 8.0V
2.3
10
100
1000
FOSC=300kHz, VOUT1, 2=2.5V
FOSC=300kHz, VOUT1, 2=2.5V
2.6
1
Output Current1, 2 IOUT1, 2 (mA)
Output Current1, 2 IOUT1, 2 (mA)
L=22μ H(CDRH5D28), CL=94μF(Tantalum)
SD:CMS02, Tr:XP162A12A6P
PWM/PFM Switching Control
10.0V
2.6
8.0V
2.5
2.4
3.3V 4.2V 5.0V 6.0V
VIN=2.7V
2.3
2.2
2.2
0.1
1
10
100
Output Current1, 2 IOUT1, 2 (mA)
1000
0.1
1
10
100
Output Current1, 2 IOUT1, 2 (mA)
* When setting VOUT1, 2 =1.0V, VIN=8.0V, 10.0V,
CL should be 94μF (Tantalum) + 100μF (OS-COM)
12/32
1000
L=22μ H(CDRH5D28), CL=94μF(Tantalum)
SD:CMS02, Tr:XP162A12A6P
2.0
Output Voltage1, 2 V OUT1, 2 (V)
10
FOSC=300kHz, VOUT1, 2=1.8V
L=22μ H(CDRH5D28), CL=94μ F(Tantalum)
SD:CMS02, Tr:XP162A12A6P
Output Voltage1, 2 V OUT1, 2 (V)
1
Output Current1, 2 IOUT1, 2 (mA)
FOSC=300kHz, VOUT1, 2=1.8V
2.7
VIN=2.7V 3.3V
5.0V
1000
XC9503
Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(1) Output Voltage vs. Output Current (Continued)
FOSC=300kHz, VOUT1, 2=3.3V
FOSC=300kHz, VOUT1, 2=3.3V
L=22μH(CDRH5D28), CL=94μF(Tantalum)
SD:CMS02, Tr:XP162A12A6P
L=22μ H(CDRH5D28), CL=94μ F(Tantalum)
SD:CMS02, Tr:XP162A12A6P
3.5
3.5
PWM/PFM Switching Control
VIN=4.2V 5.0V 6.0V 8.0V
3.4
Output Voltage1, 2 V OUT1, 2 (V)
Output Voltage1, 2 V OUT1, 2 (V)
PWM Control
3.3
10.0V
3.2
3.1
3.4
VIN=4.2V 5.0V 6.0V 8.0V
3.3
3.2
10.0V
3.1
3.0
3.0
0.1
1
10
100
0.1
1000
L=22μ H(CDRH5D28), CL=94μF(Tantalum)
SD:CMS02, Tr:XP162A12A6P
5.2
Output Voltage1, 2 V OUT1, 2 (V)
Output Voltage1, 2 V OUT1, 2 (V)
10.0V
5.0
VIN= 6.0V 8.0V
4.9
100
1000
L=22μ H(CDRH5D28), CL=94μ F(Tantalum)
SD:CMS02, Tr:XP162A12A6P
PWM/PFM Switching Control
PWM Control
5.1
10
FOSC=300kHz, VOUT1, 2=5.0V
FOSC=300kHz, VOUT1, 2=5.0V
5.2
1
Output Current1, 2 IOUT1, 2 (mA)
Output Current1, 2 IOUT1, 2 (mA)
4.8
10.0V
5.1
5.0
VIN= 6.0V 8.0V
4.9
4.8
4.7
4.7
0.1
1
10
100
0.1
1000
FOSC=180kHz, VOUT1, 2=1.0V
1.2
1
10
100
1000
Output Current1, 2 IOUT1, 2 (mA)
Output Current1, 2 IOUT1, 2 (mA)
FOSC=180kHz, VOUT1, 2=1.0V
L=47μH(CDRH6D38), CL=94μF(Tantalum)
SD:CMS02, Tr:XP162A12A6P
L=47μ H(CDRH6D38), CL=94μ F(Tantalum)
SD:CMS02, Tr:XP162A12A6P
1.2
PWM Control
1.1
Output Voltage1, 2 V OUT1, 2 (V)
Output Voltage1, 2 V OUT1, 2 (V)
PWM/PFM Switching Control
10.0V
1.0
0.9
VIN=2.7V 3.3V 4.2V
5.0V 6.0V 8.0V
0.8
1.1
10.0V
1.0
0.9
4.2V 5.0V 6.0V 8.0V
VIN=2.7V 3.0V
0.8
0.7
0.7
0.1
1
10
100
Output Current1, 2 IOUT1, 2 (mA)
1000
0.1
1
10
100
1000
Output Current1, 2 IOUT1, 2 (mA)
* When setting VOUT1, 2 =1.0V, VIN=8.0V, 10.0V,
CL should be 94μF (Tantalum) + 100μF (OS-COM)
13/32
XC9503 Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(1) Output Voltage vs. Output Current (Continued)
FOSC=180kHz, VOUT1, 2=5.0V
FOSC=180kHz, VOUT1, 2=3.3V
L=47μ H(CDRH6D38), CL=94μF(Tantalum)
SD:CMS02, Tr:XP162A12A6P
L=47μH(CDRH6D38), CL=94μ F(Tantalum)
SD:CMS02, Tr:XP162A12A6P
5.2
PWM/PFM Switching Control
PWM Control
PWM/PFM Switching Control
PWM Control
Output Voltage1, 2 V OUT1, 2 (V)
Output Voltage1, 2 V OUT1, 2 (V)
3.5
3.4
3.3
3.2
VIN=4.2V 5.0V 6.0V 8.0V 10V
3.1
5.1
5.0
4.9
VIN= 6.0V 8.0V 10V
4.8
4.7
3.0
0.1
1
10
100
0.1
1000
1
Output Current1, 2 IOUT1, 2 (mA)
L=10μ H(CDRH5D28), CL=94μ F(Tantalum)
SD:CMS02, Tr:XP162A12A6P
Output Voltage1, 2 V OUT1, 2 (V)
Output Voltage1, 2 V OUT1, 2 (V)
PWM/PFM Switching Control
1.0
VIN=2.7V 3.3V 4.2V 5.0V
6.0V 8.0V 10V
0.9
0.8
0.7
VIN=2.7V 3.3V 4.2V 5.0V
1.1
1.0
0.9
6.0V 8.0V 10.0V
0.8
0.7
0.1
1
10
100
1000
0.1
Output Current1, 2 IOUT1, 2 (mA)
1
10
100
1000
Output Current1, 2 IOUT1, 2 (mA)
FOSC=500kHz, VOUT1, 2=3.3V
FOSC=500kHz, VOUT1, 2=3.3V
L=10μH(CDRH5D28), CL=94μ F(Tantalum)
SD:CMS02, Tr:XP162A12A6P
3.5
PWM Control
Output Voltage1, 2 V OUT1, 2 (V)
Output Voltage1, 2 V OUT1, 2 (V)
1000
L=10μ H(CDRH5D28), CL=94μ F(Tantalum)
SD:CMS02, Tr:XP162A12A6P
1.2
PWM Control
1.1
3.5
100
FOSC=500kHz, VOUT1, 2=1.0V
FOSC=500kHz, VOUT1, 2=1.0V
1.2
10
Output Current1, 2 IOUT1, 2 (mA)
3.4
3.3
VIN=4.2V 5.0V 6.0V 8.0V 10V
3.2
3.1
L=10μ H(CDRH5D28), CL=94μ F(Tantalum)
SD:CMS02, Tr:XP162A12A6P
PWM/PFM Switching Control
10.0V
3.4
3.3
VIN=4.2V 5.0V 6.0V 8.0V
3.2
3.1
3.0
3.0
0.1
1
10
100
Output Current1, 2 IOUT1, 2 (mA)
1000
0.1
1
10
100
1000
Output Current1, 2 IOUT1, 2 (mA)
* When setting VOUT1, 2 =1.0V, VIN=8.0V, 10.0V,
CL should be 94μF (Tantalum) + 100μF (OS-COM)
14/32
XC9503
Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(1) Output Voltage vs. Output Current (Continued)
FOSC=500kHz, VOUT1, 2=5.0V
L=10μ H(CDRH5D28), CL=94μF(Tantalum)
SD:CMS02, Tr:XP162A12A6P
5.2
Output Voltage1, 2 V OUT1, 2 (V)
PWM/PFM Switching Control
PWM Control
5.1
5.0
VIN= 6.0V 8.0V 10V
4.9
4.8
4.7
0.1
1
10
100
1000
Output Current1, 2 IOUT1, 2 (mA)
15/32
XC9503 Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(2) Efficiency vs. Output Current
FOSC=300kHz, VOUT1, 2=1.0V
FOSC=300kHz, VOUT1, 2=1.0V
L=22μ H(CDRH5D28), CL=94μF(Tantalum)
SD:CMS02, Tr:XP162A12A6P
100
PWM/PFM Switching Control
PWM Control
PWM/PFM Switching Control
PWM Control
80
Efficiency1, 2 EFFI1, 2 (%)
Efficiency1, 2 EFFI1, 2 (%)
100
L=22μ H(CDRH5D28), CL=94μ F(Tantalum)
SD:CMS02, Tr:XP162A12A6P
60
4.2V
3.3V
40
VIN=2.7V
20
10.0V
80
8.0V
6.0V
60
40
20
VIN=5.0V
0
0
0.1
1
10
100
1000
0.1
Output Current1, 2 IOUT1, 2 (mA)
100
1000
L=22μH(CDRH5D28), CL=94μF(Tantalum)
SD:CMS02, Tr:XP162A12A6P
L=22μ H(CDRH5D28), CL=94μ F(Tantalum)
SD:CMS02, Tr:XP162A12A6P
100
100
80
80
VIN= 2.7V
60
3.3V
4.2V
20
Efficiency1, 2 EFFI1, 2 (%)
Efficiency1, 2 EFFI1, 2 (%)
10
FOSC=300kHz, VOUT1, 2=1.8V
FOSC=300kHz, VOUT1, 2=1.8V
40
1
Output Current1, 2 IOUT1, 2 (mA)
10.0V
60
VIN=5.0V
8.0V
40
6.0V
20
0
0
0.1
1
10
100
0.1
1000
1
FOSC=300kHz, VOUT1, 2=2.5V
100
1000
FOSC=300kHz, VOUT1, 2=2.5V
L=22μ H(CDRH5D28), CL=94μ F(Tantalum)
SD:CMS02, Tr:XP162A12A6P
100
10
Output Current1, 2 IOUT1, 2 (mA)
Output Current1, 2 IOUT1, 2 (mA)
L=22μH(CDRH5D28), CL=94μF(Tantalum)
SD:CMS02, Tr:XP162A12A6P
100
80
VIN=2.7V
60
Efficiency1, 2 EFFI1, 2 (%)
Efficiency1, 2 EFFI1, 2 (%)
PWM/PFM Switching Control
PWM Control
3.3V
40
4.2V
20
80
10V
60
VIN=5.0V
40
8.0V
6.0V
20
PWM/PFM Switching Control
PWM Control
0
0.1
1
10
100
Output Current1, 2 IOUT1, 2 (mA)
1000
0
0.1
1
10
100
Output Current1, 2 IOUT1, 2 (mA)
* When setting VOUT1, 2 =1.0V, VIN=8.0V, 10.0V,
CL should be 94μF (Tantalum) + 100μF (OS-COM)
16/32
1000
XC9503
Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(2) Efficiency vs. Output Current (Continued)
FOSC=300kHz, VOUT1, 2=5.0V
FOSC=300kHz, VOUT1, 2=3.3V
L=22μH(CDRH5D28), CL=94μF(Tantalum)
SD:CMS02, Tr:XP162A12A6P
100
PWM/PFM Switching Control
PWM Control
PWM/PFM Switching Control
PWM Control
80
10.0V
Efficiency1, 2 EFFI1, 2 (%)
Efficiency1, 2 EFFI1, 2 (%)
100
L=22μ H(CDRH5D28), CL=94μ F(Tantalum)
SD:CMS02, Tr:XP162A12A6P
60
8.0V
40
6.0V
20
VIN=4.2V
5.0V
80
60
10.0V
40
8.0V
VIN=6.0V
20
0
0
0.1
1
10
100
0.1
1000
L=47μH(CDRH6D28), CL=94μ F(Tantalum)
SD:CMS02, Tr:XP162A12A6P
PWM/PFM Switching Control
PWM Control
1000
VIN=5.0V
80
60
4.2V
40
3.3V
VIN=2.7V
20
100
L=47μH(CDRH6D28), CL=94μF(Tantalum)
SD:CMS02, Tr:XP162A12A6P
100
Efficiency1, 2 EFFI1, 2 (%)
Efficiency1, 2 EFFI1, 2 (%)
10
FOSC=180kHz, VOUT1, 2=1.0V
FOSC=180kHz, VOUT1, 2=1.0V
100
1
Output Current1, 2 IOUT1, 2 (mA)
Output Current1, 2 IOUT1, 2 (mA)
80
8.0V
60
6.0V
40
10V
20
PWM/PFM Switching Control
PWM Control
0
0
0.1
1
10
100
0.1
1000
1
10
100
Output Current1, 2 IOUT1, 2 (mA)
Output Current1, 2 IOUT1, 2 (mA)
FOSC=180kHz, VOUT1, 2=3.3V
FOSC=180kHz, VOUT1, 2=5.0V
L=47μ H(CDRH6D28), CL=94μF(Tantalum)
SD:CMS02, Tr:XP162A12A6P
100
1000
L=47μH(CDRH6D28), CL=94μF(Tantalum)
SD:CMS02, Tr:XP162A12A6P
100
VIN=4.2V
Efficiency1, 2 EFFI1, 2 (%)
Efficiency1, 2 EFFI1, 2 (%)
5.0V
80
10V
60
8.0V
6.0V
40
20
80
10V
60
8.0V
VIN=6.0V
40
20
PWM/PFM Switching Control
PWM Control
PWM/PFM Switching Control
PWM Control
0
0
0.1
1
10
100
Output Current1, 2 IOUT1, 2 (mA)
1000
0.1
1
10
100
1000
Output Current1, 2 IOUT1, 2 (mA)
* When setting VOUT1, 2 =1.0V, VIN=8.0V, 10.0V,
CL should be 94μF (Tantalum) + 100μF (OS-COM)
17/32
XC9503 Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(2) Efficiency vs. Output Current (Continued)
FOSC=500kHz, VOUT1, 2=1.0V
100
PWM/PFM Switching Control
PWM Control
80
60
4.2V
40
3.3V
20
VIN=2.7V
L=10μ H(CDRH5D28), CL=94μ F(Tantalum)
SD:CMS02, Tr:XP162A12A6P
100
Efficiency1, 2 EFFI1, 2 (%)
Efficiency1, 2 EFFI1, 2 (%)
FOSC=500kHz, VOUT1, 2=1.0V
L=10μH(CDRH5D28), CL=94μF(Tantalum)
SD:CMS02, Tr:XP162A12A6P
0
PWM/PFM Switching Control
PWM Control
80
VIN=5.0V
60
10V
40
8.0V
6.0V
20
0
0.1
1
10
100
1000
0.1
Output Current1, 2 IOUT1, 2 (mA)
L=10μ H(CDRH5D28), CL=94μ F(Tantalum)
SD:CMS02, Tr:XP162A12A6P
Efficiency1, 2 EFFI1, 2 (%)
Efficiency1, 2 EFFI1, 2 (%)
100
PWM/PFM Switching Control
PWM Control
80
10.0V
8.0V
60
6.0V
40
5.0V
VIN=4.2V
20
10
100
L=10μ H(CDRH5D28), CL=94μ F(Tantalum)
SD:CMS02, Tr:XP162A12A6P
PWM/PFM Switching Control
PWM Control
80
60
10.0V
40
8.0V
VIN=6.0V
20
0
0
0.1
1
10
100
Output Current1, 2 IOUT1, 2 (mA)
1000
0.1
1
10
100
Output Current1, 2 IOUT1, 2 (mA)
* When setting VOUT1, 2 =1.0V, VIN=8.0V, 10.0V,
CL should be 94μF (Tantalum) + 100μF (OS-COM)
18/32
1000
FOSC=500kHz, VOUT1, 2=3.3V
FOSC=500kHz, VOUT1, 2=3.3V
100
1
Output Current1, 2 IOUT1, 2 (mA)
1000
XC9503
Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(3) Ripple Voltage vs. Output Current
FOSC=300kHz, VOUT1, 2=1.0V
FOSC=300kHz, VOUT1, 2=1.0V
L=22μ H(CDRH5D28), CL=94μF(Tantalum)
SD:CMS02, Tr:XP162A12A6P
L=22μ H(CDRH5D28), CL=94μ F(Tantalum)
SD:CMS02, Tr:XP162A12A6P
100
PWM/PFM Switching Control
PWM Control
80
60
Ripple Voltage1, 2 (mV)
Ripple Voltage1, 2 (mV)
100
VIN=2.7V 3.3V 5.0V 6.0V
40
8.0V 10V
4.2V
20
80
VIN=2.7V
60
6.0V 5.0V
40
0.1
1
10
100
0.1
1000
1
1000
L=22μ H(CDRH5D28), CL=94μF(Tantalum)
SD:CMS02, Tr:XP162A12A6P
100
PWM/PFM Switching Control
PWM Control
Ripple Voltage1, 2 (mV)
80
VIN=2.7V 3.3V 4.2V 5.0V
6.0V 8.0V 10V
60
100
FOSC=300kHz, VOUT1, 2=1.8V
L=22μ H(CDRH5D28), CL=94μ F(Tantalum)
SD:CMS02, Tr:XP162A12A6P
100
10
Output Current1, 2 IOUT1, 2 (mA)
FOSC=300kHz, VOUT1, 2=1.8V
Ripple Voltage1, 2 (mV)
8.0V 3.3V
20
Output Current1, 2 IOUT1, 2 (mA)
40
20
80
60
5.0V 4.2V
10V 8.0V 6.0V
3.3V VIN=2.7V
40
20
0
0
0.1
1
10
100
0.1
1000
10
100
1000
FOSC=300kHz, VOUT1, 2=2.5V
FOSC=300kHz, VOUT1, 2=2.5V
L=22μ H(CDRH5D28), CL=94μF(Tantalum)
SD:CMS02, Tr:XP162A12A6P
L=22μ H(CDRH5D28), CL=94μF(Tantalum)
SD:CMS02, Tr:XP162A12A6P
100
PWM Control
Ripple Voltage1, 2 (mV)
80
VIN=2.7V 3.3V 4.2V 5.0V
6.0V 8.0V 10V
60
1
Output Current1, 2 IOUT1, 2 (mA)
Output Current1, 2 IOUT1, 2 (mA)
Ripple Voltage1, 2 (mV)
4.2V
0
0
100
10V
40
20
PWM/PFM Switching Control
80
60
VIN=2.7V
10V 8.0V 6.0V 5.0V
40
4.2V
3.3V
20
0
0
0.1
1
10
100
Output Current1, 2 IOUT1, 2 (mA)
1000
0.1
1
10
100
1000
Output Current1, 2 IOUT1, 2 (mA)
* When setting VOUT1, 2 =1.0V, VIN=8.0V, 10.0V,
CL should be 94μF (Tantalum) + 100μF (OS-COM)
19/32
XC9503 Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(3) Ripple Voltage vs. Output Current (Continued)
FOSC=300kHz, VOUT1, 2=3.3V
FOSC=300kHz, VOUT1, 2=3.3V
L=22μ H(CDRH5D28), CL=94μ F(Tantalum)
SD:CMS02, Tr:XP162A12A6P
100
PWM Control
80
VIN=4.2V 5.0V 6.0V
8.0V 10V
60
40
20
PWM/PFM Switching Control
80
Ripple Voltage1, 2 (mV)
Ripple Voltage1, 2 (mV)
100
L=22μ H(CDRH5D28), CL=94μF(Tantalum)
SD:CMS02, Tr:XP162A12A6P
60
VIN=4.2V
40
0
0.1
1
10
100
1000
0.1
1
Output Current1, 2 IOUT1, 2 (mA)
100
PWM Control
80
Ripple Voltage1, 2 (mV)
Ripple Voltage1, 2 (mV)
100
60
VIN=6.0V
8.0V
10V
20
0
L=22μH(CDRH5D28), CL=94μ F(Tantalum)
SD:CMS02, Tr:XP162A12A6P
PWM/PFM Switching Control
80
60
40
VIN=6.0V
10.0V
8.0V
20
0
0.1
1
10
100
1000
0.1
1
10
100
Output Current1, 2 IOUT1, 2 (mA)
Output Current1, 2 IOUT1, 2 (mA)
FOSC=180kHz, VOUT1, 2=1.0V
FOSC=180kHz, VOUT1, 2=1.0V
L=47μ H(CDRH6D28), CL=94μ F(Tantalum)
SD:CMS02, Tr:XP162A12A6P
100
100
PWM Control
Ripple Voltage1, 2 (mV)
80
VIN=2.7V 3.3V 4.2V 5.0V
6.0V 8.0V 10V
60
40
20
0
1000
L=47μ H(CDRH6D28), CL=94μF(Tantalum)
SD:CMS02, Tr:XP162A12A6P
PWM/PFM Switching Control
80
60
VIN=2.7V
40
4.2V 10V 5.0V 6.0V
8.0V
3.3V
20
0
0.1
1
10
100
Output Current1, 2 IOUT1, 2 (mA)
1000
0.1
1
10
100
Output Current1, 2 IOUT1, 2 (mA)
* When setting VOUT1, 2 =1.0V, VIN=8.0V, 10.0V,
CL should be 94μF (Tantalum) + 100μF (OS-COM)
20/32
1000
FOSC=300kHz, VOUT1, 2=5.0V
L=22μ H(CDRH5D28), CL=94μF(Tantalum)
SD:CMS02, Tr:XP162A12A6P
40
10
Output Current1, 2 IOUT1, 2 (mA)
FOSC=300kHz, VOUT1, 2=5.0V
Ripple Voltage1, 2 (mV)
10.0V
20
0
100
8.0V
5.0V 6.0V
1000
XC9503
Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(3) Ripple Voltage vs. Output Current (Continued)
FOSC=180kHz, VOUT1, 2=3.3V
FOSC=180kHz, VOUT1, 2=3.3V
L=47μH(CDRH6D28), CL=94μ F(Tantalum)
SD:CMS02, Tr:XP162A12A6P
100
PWM Control
PWM/PFM Switching Control
80
Ripple Voltage1, 2 (mV)
Ripple Voltage1, 2 (mV)
100
60
10V
40
8.0V
20
VIN=4.2V 6.0V
5.0V
0
80
60
40
VIN=4.2V
5.0V
1
10
100
8.0V
10V
20
1000
0.1
1
10
100
Output Current1, 2 IOUT1, 2 (mA)
Output Current1, 2 IOUT1, 2 (mA)
FOSC=180kHz, VOUT1, 2=5.0V
FOSC=180kHz, VOUT1, 2=5.0V
L=47μH(CDRH6D28), CL=94μ F(Tantalum)
SD:CMS02, Tr:XP162A12A6P
100
PWM Control
Ripple Voltage1, 2 (mV)
80
60
40
10V
8.0V
VIN=6.0V
20
1000
L=47μ H(CDRH6D28), CL=94μF(Tantaium)
SD:CMS02, Tr:XP162A12A6P
100
0
PWM/PFM Switching Control
80
60
40
VIN=6.0V
8.0V
10V
20
0
0.1
1
10
100
1000
0.1
1
Output Current1, 2 IOUT1, 2 (mA)
1000
L=10μ H(CDRH5D28), CL=94μF(Tantalum)
SD:CMS02, Tr:XP162A12A6P
100
PWM Control
Ripple Voltage1, 2 (mV)
80
60
100
FOSC=500kHz, VOUT1, 2=1.0V
L=10μH(CDRH5D28), CL=94μ F(Tantalum)
SD:CMS02, Tr:XP162A12A6P
100
10
Output Current1, 2 IOUT1, 2 (mA)
FOSC=500kHz, VOUT1, 2=1.0V
Ripple Voltage1, 2 (mV)
6.0V
0
0.1
Ripple Voltage1, 2 (mV)
L=47μH(CDRH6D28), CL=94μ F(Tantalum)
SD:CMS02, Tr:XP162A12A6P
VIN=2.7V 3.3V 4.2V 5.0V
6.0V 8.0V 10V
40
20
0
PWM/PFM Switching Control
80
60
VIN=2.7V
40
8.0V 10V 5.0V
6.0V
4.2V
3.3V
20
0
0.1
1
10
100
Output Current1, 2 IOUT1, 2 (mA)
1000
0.1
1
10
100
1000
Output Current1, 2 IOUT1, 2 (mA)
* When setting VOUT1, 2 =1.0V, VIN=8.0V, 10.0V,
CL should be 94μF (Tantalum) + 100μF (OS-COM)
21/32
XC9503 Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(3) Ripple Voltage vs. Output Current (Continued)
FOSC=500kHz, VOUT1, 2=3.3V
FOSC=500kHz, VOUT1, 2=3.3V
L=10μ H(CDRH5D28), CL=94μ F(Tantalum)
SD:CMS02, Tr:XP162A12A6P
L=10μ H(CDRH5D28), CL=94μ F(Tantalum)
SD:CMS02, Tr:XP162A12A6P
PWM/PFM Switching Control
PWM Control
80
Ripple Voltage1, 2 (mV)
Ripple Voltage1, 2 (mV)
100
100
60
8.0V 10V
6.0V
40
5.0V
VIN=4.2V
20
80
60
VIN=4.2V
5.0V
40
0.1
20
1
10
100
0.1
1000
L=10μ H(CDRH5D28), CL=94μF(Tantalum)
SD:CMS02, Tr:XP162A12A6P
80
Ripple Voltage1, 2 (mV)
Ripple Voltage1, 2 (mV)
100
PWM Control
60
10V
8.0V
VIN=6.0V
20
10
100
1000
FOSC=500kHz, VOUT1, 2=5.0V
FOSC=500kHz, VOUT1, 2=5.0V
40
1
Output Current1, 2 IOUT1, 2 (mA)
Output Current1, 2 IOUT1, 2 (mA)
L=10μ H(CDRH5D28), CL=94μF(Tantalum)
SD:CMS02, Tr:XP162A12A6P
PWM/PFM Switching Control
80
60
40
VIN=6.0V
8.0V
10V
20
0
0
0.1
1
10
100
Output Current1, 2 IOUT1, 2 (mA)
22/32
10V
0
0
100
8.0V
6.0V
1000
0.1
1
10
100
Output Current1, 2 IOUT1, 2 (mA)
1000
XC9503
Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(4) Supply Current 1 vs. Supply Voltage
(5) Supply Current 1_1 vs. Supply Voltage
XC9503B092 (180KHz)
XC9503B092 (180KHz)
250
Topr=85℃
25℃
- 40℃
200
Suppy Current 1-1 IDD1-1(μA)
Supply Current 1 IDD1 (μ A)
250
150
100
50
0
Topr=85℃
25℃
- 40℃
200
150
100
50
0
0
2
4
6
8
10
0
2
Supply Voltage VDD (V)
(6) Supply Current 1_2 vs. Supply Voltage
Supply Current 2 IDD2 (μA)
Supply Current 1-2 IDD1-2(μA)
100
50
0
2
4
6
8
Topr=85℃
25℃
- 40℃
200
150
100
50
0
10
0
2
4
Supply Voltage VDD (V)
Oscillaltion Frequency Fosc （kHz）
Stand-by Curret ISTB(μA)
Topr=85℃
25℃
- 40℃
6
4
2
0
4
6
Suppy Voltage VDD (V)
10
XC9503B093(180kHz)
10
2
8
(9) Oscillation Frequency vs. Supply Voltage
XC9503B092 (180KHz)
0
6
Supply Voltage VDD (V)
(8) Stand-by Current vs. Supply Voltage
8
10
250
150
0
8
XC9503B092 (180KHz)
Topr=85OC
Topr=85℃
25OC
25℃
- 40OC
- 40℃
200
6
(7) Supply Current 2 vs. Supply Voltage
XC9503B092 (180KHz)
250
4
Supply Voltage VDD (V)
8
10
360
330
300
270
240
0
2
4
6
8
10
Supply Voltage VDD (V)
23/32
XC9503 Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(10) EN1, 2 'High' 'Low' Voltage vs. Supply Voltage
(11) PWM1, 2 'High' 'Low' Voltage vs. Supply Voltage
XC9503B093 (300KHz)
XC9503B093 (300KHz)
0.8
PWM1, 2 'H' 'L' Voltage VPWM1, 2 (V)
EN1, 2 'H' 'L' Voltage VEN1, 2(V)
0.8
0.6
- 40℃
0.4
85℃
Topr=25℃
0.2
0
0
2
4
6
8
0.6
- 40℃
0.4
85℃
Topr=25℃
0.2
0
10
0
2
Supply Voltage VDD (V)
(12) PFM Duty Ratio 1, 2 vs. Supply Voltage
Output Voltage VOUT (V)
PFM duty ratio 1, 2 (%)
Topr=85℃
25℃
- 40℃
30
25
20
4
6
8
3.4
3.3
3.2
VIN=5.0V
IOUT=200mA
3.1
3.0
-50
10
(14) EXT1, 2 'High' On Resistance vs. Supply Voltage
30
20
10
0
6
Supply Voltage VDD (V)
24/32
EXT1, 2 'Low' ON Resistance(Ω)
EXT1, 2 'High' On Resistance (Ω)
Topr=85℃
25℃
- 40℃
4
40
70
100
XC9503B092 (180KHz)
50
2
10
(15) EXT1, 2 'Low' On Resistance vs. Supply Voltage
XC9503B092 (180KHz)
0
-20
Ambient Temperature Ta (℃)
Supply Voltage VDD (V)
40
10
L=22uH(CDRH5D28), CL=94uF(Tantalum)
Tr:XP162A12A6, SD:CMS02
3.5
2
8
XC9503B093(300kHz)
XC9503B093(300kHz)
40
0
6
(13) Output Voltage vs. Ambient Temperature
XC9503B093(300kHz)
35
4
Supply Voltage VDD (V)
8
10
50
Topr=85℃
25℃
- 40℃
40
30
20
10
0
0
2
4
6
Supply Voltage VDD (V)
8
10
XC9503
Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(16) Soft-Start Time 1, 2 vs. Supply Voltage
25/32
XC9503 Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(17) Load Transient Response
< VOUT1, 2 = 3.3 V, VIN = 5.0V, IOUT1, 2 = 100μA ⇔
300mA >
● PWM Control
FOSC = 300kHz, VOUT1, 2 = 3.3V
VIN = 5.0V, IOUT1, 2 = 100μA → 300mA
CH1
FOSC = 300kHz, VOUT1, 2 = 3.3V
VIN = 5.0V, IOUT1, 2 = 300mA → 100μA
3.3V
3.3V
CH1
300mA
300mA
CH2
100μA
100μA
CH2
10msec/div
CH1: VOUT1, 2, AC-COUPLED, 50mV/div
CH2: IOUT1, 2, 150mA/div
200μsec/div
CH1: VOUT1, 2, AC-COUPLED, 100mV/div
CH2: IOUT1, 2, 150mA/div
● PWM/PFM Switching Control
FOSC=300kHz, VOUT1, 2 =3.3V
VIN=5.0V, IOUT1, 2 =100μA→300mA
CH1
FOSC=300kHz, VOUT1, 2=3.3V
VIN=5.0V, IOUT1, 2=300mA→100μA
3.3V
CH1
3.3V
300mA
300mA
100μA
CH2
200μsec/div
CH1: VOUT1, 2, AC-COUPLED, 100mV/div
CH2: IOUT1, 2, 1 50mA/div
26/32
100μA
CH2
10msec/div
CH1: VOUT1, 2, AC-COUPLED, 100mV/div
CH2: IOUT1, 2, 150mA/div
XC9503
Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(17) Load Transient Response (Continued)
< VOUT1, 2 = 3.3V, VIN = 5.0V, IOUT1, 2 =10mA ⇔ 300mA >
● PWM Control
FOSC=300kHz, VOUT1, 2=3.3V
VIN=5.0V, IOUT1, 2 =300mA→10mA
FOSC=300kHz, VOUT1, 2 =3.3V
VIN=5.0V, IOUT1, 2 =10mA→300mA
CH1
3.3V
3.3V
CH1
300mA
300mA
CH2
10mA
CH2
200μsec/div
CH1: VOUT1, 2, AC-COUPLED, 50mV/div
CH2: IOUT1, 2, 150mA/div
10mA
400μsec/div
CH1: VOUT1, 2, AC-COUPLED, 50mV/div
CH2: IOUT1, 2, 150mA/div
● PWM/PFM Switching Control
FOSC=300kHz, VOUT1, 2 =3.3V
VIN=5.0V, IOUT1, 2 =10mA→300mA
FOSC=180kHz, VOUT1=3.3V
VIN=5.0V, IOUT1, 2 =300mA→10mA
3.3V
CH1
3.3V
CH1
300mA
CH2
10mA
200μsec/div
CH1: VOUT1, 2, AC-COUPLED, 100mV/div
CH2: IOUT1, 2, 150mA/div
100mA
CH2
10mA
200μsec/div
CH1: VOUT1, 2, AC-COUPLED, 50mV/div
CH2: IOUT1, 2, 150mA/div
27/32
XC9503 Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(17) Load Transient Response (Continued)
< VOUT1, 2 = 0.9V, VIN = 3.3V, IOUT1, 2 =100μA ⇔ 300mA >
● PWM Control
FOSC=300kHz, VOUT1, 2 =0.9V
VIN=3.3V, IOUT1, 2 =100μA→300mA
CH1
FOSC=300kHz, VOUT1, 2 =0.9V
VIN=3.3V, IOUT1, 2 =300mA→100μA
0.9V
CH1
0.9V
300mA
100μA
CH2
300mA
100μA
CH2
200μsec/div
CH1: VOUT1, 2, AC-COUPLED, 20mV/div
CH2: IOUT1, 2, 150mA/div
4msec/div
CH1: VOUT1, 2, AC-COUPLED, 20mV/div
CH2: IOUT1, 2, 150mA/div
● PWM/PFM Switching Control
FOSC=300kHz, VOUT1, 2 =0.9V
VIN=3.3V, IOUT1, 2 =100μA→300mA
FOSC=300kHz, VOUT1, 2 =0.9V
VIN=3.3V, IOUT1, 2 =300mA→100μA
0.9V
CH1
0.9V
CH1
300mA
100μA
CH2
200μsec/div
CH1: VOUT1, 2, AC-COUPLED, 20mV/div
CH2: IOUT1, 2, 150mA/div
28/32
300mA
100μA
CH2
200μsec/div
CH1: VOUT1, 2, AC-COUPLED, 50mV/div
CH2: IOUT1, 2, 150mA/div
XC9503
Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(17) Load Transient Response (Continued)
< VOUT1, 2 = 0.9V, VIN = 3.3V, IOUT1, 2 =10mA ⇔ 300mA >
● PWM Control
FOSC=300kHz, VOUT1, 2 =0.9V
VIN=3.3V, IOUT1, 2 =10mA→300mA
CH1
FOSC=300kHz, VOUT1, 2 =0.9V
VIN=3.3V, IOUT1, 2 =300mA→10mA
0.9V
CH1
0.9V
300mA
CH2
10mA
300mA
10mA
CH2
100μsec/div
CH1: VOUT1, 2, AC-COUPLED, 20mV/div
CH2: IOUT1, 2, 150mA/div
100μsec/div
CH1: VOUT1, 2, AC-COUPLED, 20mV/div
CH2: IOUT1, 2, 150mA/div
● PWM/PFM Switching Control
FOSC=300kHz, VOUT1, 2 =0.9V
VIN=3.3V, IOUT1, 2 =10mA→300mA
FOSC=300kHz, VOUT1, 2 =0.9V
VIN=3.3V, IOUT1, 2 =300mA→10mA
0.9V
CH1
0.9V
CH1
300mA
300mA
CH2
CH2
10mA
10mA
200μsec/div
CH1: VOUT1, 2, AC-COUPLED, 20mV/div
CH2: IOUT1, 2, 150mA/div
200μsec/div
CH1: VOUT1, 2, AC-COUPLED, 20mV/div
CH2: IOUT1, 2, 150mA/div
29/32
XC9503 Series
■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
(17) Load Transient Response (Continued)
< PWM Control ⇔ PWM / PFM Switching Control >
FOSC=300kHz, VOUT1, 2 =3.3V
VIN=5.0V, IOUT1, 2 =5mA, PWM1, 2 'Low'→'High'
CH1
3.3V
FOSC=300kHz, VOUT1, 2 =3.3V
VIN=5.0V, IOUT1, 2 =5mA, PWM1, 2 'High'→'Low'
CH1
3.3V
0.65V
0.65V
CH2
0V
CH2
0V
200μsec/div
CH1: VOUT1, 2, AC-COUPLED, 20mV/div
CH2: IOUT1, 2, 0.5V/div
400μsec/div
CH1: VOUT1, 2, AC-COUPLED, 10mV/div
CH2: IOUT1, 2, 0.5V/div
< Soft-Start Wave Form >
FOSC=300kHz, VOUT1, 2 =3.3V
VIN = 5.0V, IOUT1, 2 = 100mA,
EN1, 2 'Low'→'High', CIN=47μF
FOSC=300kHz, VOUT1, 2 =3.3V
VIN = 5.0V, IOUT1, 2 = 300mA,
EN1, 2 'Low'→'High', CIN=47μF
3.3V
3.3V
CH1
CH1
200mA
CH2
CH2
0.65V
CH3
75mA
4msec/div
CH1: VOUT1, 2, 2.0V/div
CH2: IIN1, 2, 100mA/div
CH3: EN1, 2, 0.5V/div
0.65V
CH3
4msec/div
CH1: VOUT1, 2, 2.0V/div
CH2: IIN1, 2, 50mA/div
CH3: EN1, 2, 0.5V/div
* CH1: EN2=GND when measurement
CH2: EN1=GND when measurement
30/32
XC9503
Series
■PACKAGING INFORMATION
●MSOP-10
●USP-10
* Soldering fillet surface is not formed
because the sides of the pins are not
plated.
■MARKING RULE
① Represents product series
●MSOP-10, USP-10
10 9 8 7 6
MARK
PRODUCT SERIES
4
XC9503B09xxx
② Represents type of DC/DC controller
① ②③
④ ⑤⑥
MARK
PRODUCT SERIES
B
XC9503B09xxx
③, ④ Represents FB voltage
1 2 3 4 5
MSOP-10
(TOP VIEW)
MARK
USP-10
(TOP VIEW)
③
④
0
9
VOLTAGE (V)
PRODUCT SERIES
0.9
XC9503B09xxx
⑤ Represents oscillation frequency
2
OSCILLATION FREQUENCY
(kHz)
180
3
300
XC9503B093xx
5
500
XC9503B095xx
MARK
PRODUCT SERIES
XC9503B092xx
⑥ Represents production lot number
0 to 9, A to Z repeated (G, I, J, O, Q, W excepted)
Note: No character inversion used.
31/32
XC9503 Series
1. The products and product specifications contained herein are subject to change without
notice to improve performance characteristics.
Consult us, or our representatives
before use, to confirm that the information in this catalog is up to date.
2. We assume no responsibility for any infringement of patents, patent rights, or other
rights arising from the use of any information and circuitry in this catalog.
3. Please ensure suitable shipping controls (including fail-safe designs and aging
protection) are in force for equipment employing products listed in this catalog.
4. The products in this catalog are not developed, designed, or approved for use with such
equipment whose failure of malfunction can be reasonably expected to directly
endanger the life of, or cause significant injury to, the user.
(e.g. Atomic energy; aerospace; transport; combustion and associated safety
equipment thereof.)
5. Please use the products listed in this catalog within the specified ranges.
Should you wish to use the products under conditions exceeding the specifications,
please consult us or our representatives.
6. We assume no responsibility for damage or loss due to abnormal use.
7. All rights reserved. No part of this catalog may be copied or reproduced without the
prior permission of Torex Semiconductor Ltd.
32/32