XC9501
Series
2ch.Step-Up/Up DC/DC Controller ICs
ETR0701_004a
☆GreenOperation
Compatible
■GENERAL
DESCRIPTION
The XC9501
series are PWM controlled, PWM/PFM automatic switching controlled, multi-functional, dual step-up DC/DC
converter controller ICs.
With 0.9V (±2%) of standard voltage supply internal, and using externally connected components, output voltage can be
set freely on both DC/DC controllers between 1.5V to 30V.
With a 180kHz frequency, the size of the external components can be reduced. 100kHz, 300kHz and 500kHz switching
frequencies are also available as custom-designed products.
The control of the XC9501 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 to large output currents. Noise is easily reduced with PWM control since the switching
frequency is fixed.
The XC9501 series provides the option of being able to select the control suited to the application.
Soft-start time is internally set to 10msec which offers protection against rush currents when the power is switched on and
also against voltage overshoot
.
■APPLICATIONS
●PDAs
●Palm
top computers
●Portable
audio systems
●Various
multi-function power supplies
■FEATURES
2ch DC/DC Controller
Input Voltage Range
Supply Voltage Range
Output Voltage Range
Output Current
: (Step-Up + Step-Up)
: 0.9V ~ 10V
: 2.0V ~ 10V
: 1.5V ~ 30V (set by FB1/FB2 pins)
: More than 200mA
(V
IN
=1.8V, V
OUT
=3.3V)
Switching Frequency
: 180kHz (±15%)
100kHz, 300kHz & 500kHz
as custom
Maximum Duty Cycle
: 80% (TYP.)
Control Method
: PWM or PWM/PFM Selectable
High Efficincy
: 83% (TYP.)
Stand-by Current
: 3.0μA (MAX.)
Soft-start
: internally set-up
Package
: MSOP-10, USP-10
Environmentally Friendly:
EU RoHS Compliant, Pb Free
■TYPICAL
APPLICATION CIRCUIT
( XC9501B092A Input: 2 cells, Output
①:
3.3V, Output
②:
5.0V )
■TYPICAL
PERFORMANCE
CHARACTERISTICS
●Efficiency
vs. Output Current
1/27
XC9501
Series
■PIN
CONFIGURATION
USP-10
(BOTTOM VIEW)
■PIN
ASSIGNMENT
PIN NUMBER PIN NAME
1
2
3
EXT 1
V
DD
FB1
FUNCTION
Channel 1: External Transistor Drive Pin <Connected to N-ch Power MOSFET Gate>
Supply Voltage
Channel 1: Output Voltage Monitor Feedback Pin
<Threshold value: 0.9V. Output Voltage can be set freely by connecting split resistor
between V
OUT1
and GND.>
Channel 1: PWM/PFM Switching Pin
<Control Output 1. PMW control when connected to V
DD
, PWM/PFM auto Switching when
connected to GND.>
Channel 1: Enable Pin
<Connected to GND when Output 1 is in stand-by mode. Connected to V
DD
when Output 1
is active. EXT1 is low when in stand-by mode.>
Channel 2: Enable Pin
<Connected to GND when Output 2 is in stand-by mode. Connected to V
DD
when Output 2
is active. EXT2 is high when in stand-by mode.>
Channel 2: PWM/PFM Switching Pin
<Control Output 2. PMW control when connected to V
DD
, PWM/PFM auto Switching when
connected to GND.>
Channel 2: Output Voltage Monitor Feedback Pin
<Threshold value: 0.9V. Output Voltage can be set freely by connecting split resistor
between V
OUT2
and GND.>
Ground
Channel2: External Transistor Drive Pin
<Connected to N-ch Power MOSFET Gate>
4
PWM1
5
EN1
6
EN2
7
PWM2
8
9
10
FB2
GND
EXT2
■PRODUCT
CLASSIFICATION
●Ordering
Information
XC9501
①②③④⑤⑥-⑦
(*1)
DESIGNATOR
①
②③
DESCRIPTION
Type of DC/DC Controller
Output Voltage
SYMBOL
B
09
1
2
3
5
AR
AR-G
DR
DR-G
DESCRIPTION
Standard (10 Pin)
FB Voltage: 0.9V
100kHz (custom)
180kHz
300kHz (custom)
500kHz (custom)
MSOP-10
MSOP-10
USP-10
USP-10
④
Oscillation Frequency
⑤⑥-⑦
Packages
Taping Type
(*
１
)
(*1)
(*2)
The “-G” suffix indicates that the products are Halogen and Antimony free as well as being fully RoHS compliant.
The device orientation is fixed in its embossed tape pocket. For reverse orientation, please contact your local Torex sales office or
representative. (Standard orientation:
⑤R-⑦,
Reverse orientation:
⑤L-⑦)
2/27
XC9501
Series
■BLOCK
DIAGRAM
■ABSOLUTE
MAXIMUM RATINGS
PARAMETER
V
DD
Pin Voltage
FB1, 2 Pin Voltage
EN1, 2 Pin Voltage
PWM1, 2 Pin Voltage
EXT1, 2 Pin Voltage
EXT1, 2 Pin Current
MSOP-10
Power Dissipation
USP-10
Operating Temperature Range
Storage Temperature Range
SYMBOL
V
DD
V
FB
V
EN
V
PWM
V
EXT
I
EXT
Pd
Topr
Tstg
RATINGS
- 0.3 ~ 12.0
- 0.3 ~ 12.0
- 0.3 ~ 12.0
- 0.3 ~ 12.0
- 0.3 ~ V
DD
+ 0.3
±100
150
150
- 40 ~ + 85
- 55 ~ + 125
Ta=25℃
UNITS
V
V
V
V
V
mA
mW
℃
℃
3/27
XC9501
Series
■ELECTRICAL
CHARACTERISTICS
XC9501B091A Common Characteristics
PARAMETER
(* 1)
Supply Voltage
SYMBOL
V
DD
V
DD
≧2.0V
Output Voltage Range
(* 4)
(FOSC = 100kHz)
CONDITIONS
I
OUT
1,2=1mA
I
OUT
1,2=1mA
I
OUT
1,2=1mA
(* 2)
Ta=25℃
CIRCUIT
-
①
②
③
④
④
④
④
④
④
④
④
④
④
④
④
④
④
V
IN
≧0.9V
V
IN
≧0.9V
(* 3)
V
OUT1
, V
OUT2
V
OUT1
V
OUT2
V
OUT1
V
OUT2
Supply Current 1
Supply Current 1-1
Supply Current 1-2
Supply Current 2
Stand-by Current
Oscillation 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
I
DD1
I
DD1-1
I
DD1-2
I
DD2
I
STB
FOSC
V
ENH
V
ENL
I
ENH
I
ENL
I
PWMH
I
PWML
I
FBH
V
FBL
FB1, 2=0V
EN1=3.0V, EN2=0V, FB1=0V
EN2=3.0V, EN1=0V, FB2=0V
FB1=0V, FB2=1.0V
FB1=1V, FB2=0V
FB1, 2=1.0V
Same as I
DD1
, EN1=EN2=0V
Same as I
DD1
FB1, 2=0V
FB1, 2=0V
FB1, 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
0.9
2.0
0.9
0.9
2.0
-
-
-
-
-
85
0.65
-
-
-
-
-
-
-
TYP.
-
-
-
-
-
-
70
50
80
60
-
100
-
-
-
-
-
-
-
-
MAX. UNITS
10.0
V
-
V
10.0
V
-
V
-
V
10.0
V
100
μA
80
150
90
3.0
115
-
0.20
0.50
-0.50
0.50
-0.50
0.50
-0.50
μA
μA
μA
μA
kHz
V
V
μA
μA
μA
μA
μA
μA
Unless otherwise stated, V
DD
=3.0V, PWM1, 2=3.0V, EN1, 2 = 3.0V
Output 1 Characteristics
PARAMETER
FB1 Voltage
Step-Up Controller
SYMBOL
V
FB1
(FOSC = 100kHz)
Ta=25℃
CIRCUIT
⑤
②
①
④
④
⑥
⑥
⑥
⑦
⑦
⑥
⑥
CONDITIONS
MIN.
TYP. MAX. UNITS
V
DD
=3.0V, V
IN
=1.5V, I
OUT1
=10mA
0.882 0.900 0.918
V
Using Tr: 2SD1628,
-
-
0.9
V
Operation Start-up
V
ST1-1
I
OUT
=1.0mA, RFB11=200kΩ, RFB12=75kΩ
(* 2)
Voltage 1
V
DD
≠V
OUT1
: I
OUT1
=1mA
-
-
2.0
V
Oscillation Start Voltage 1
V
ST2-1
FB1=0V
-
-
0.8
V
Maximum Duty Ratio 1
MAXDTY1 Same as I
DD1
75
80
88
%
PFM Duty Ratio 1
PFMDTY1 No Load, VPWM1=0V
22
30
38
%
Efficiency 1
EFFI1
I
OUT1
=100mA N-ch MOSFET: XP161A1355P
-
83
-
%
Soft-Start Time 1
TSS1
V
OUT1
×0.95V,
EN1=0V→0.65V
5.0
10.0
20.0
ms
EXT1 "High" ON Resistance
R
EXTBH1
FB1=0, EXT1=V
DD
-0.4V
-
28
47
Ω
EXT1 "Low" ON Resistance
R
EXTBL1
EN1=FB2=0V, EXT1=0.4V
-
22
30
Ω
PWM1 "High" Voltage
V
PWMH1
No Load
0.65
-
-
V
PWM1 "Low" Voltage
V
PWML1
No Load
-
-
0.20
V
Unless otherwise stated, V
DD
=EN1=PWM1=3.0V, EN2=PWM2=GND, EXT2=OPEN, FB2=OPEN, V
IN
=1.8V
Output 2 Characteristics
PARAMETER
FB2 Voltage
Operation Start-up
(* 3)
Voltage2
Oscillation Start Voltage 2
Maximum Duty Ratio 2
PFM Duty Ratio 2
Efficiency 2
Soft-Start Time 2
EXT2 "High" ON Resistance
EXT2 "Low" ON Resistance
PWM2 "High" Voltage
PWM2 "Low" Voltage
Step-Up Controller
SYMBOL
V
FB2
V
ST1-2
V
ST2-2
MAXDTY2
PFMDTY2
EFFI2
TSS2
R
EXTBH2
R
EXTBL2
V
PWMH2
V
PWML2
CONDITIONS
V
DD
=3.0V, V
IN
=1.5V, I
OUT1
=10mA
Using Tr: 2SD1628,
I
OUT1
=1.0mA, R
FB21
=200kΩ,R
FB22
=75kΩ
V
DD
≠V
OUT2
: I
OUT2
=1mA
FB2=0V
Same as I
DD1
No Load, V
PWM
2=0V
I
OUT2
=100mA, N-ch MOSFET: XP161A1355P
V
OUT1
×
0.95V, EN2=0V→0.65V
FB2=0, EXT2=V
DD
-0.4V
EN2=FB2=0V, EXT2=0.4V
No Load
No Load
(FOSC = 100kHz)
MIN.
0.882
-
-
-
75
22
-
5.0
-
-
0.65
-
TYP.
0.900
-
-
-
80
25
83
10.0
28
22
-
-
MAX. UNITS
0.918
V
0.9
2.0
0.8
85
38
-
20.0
47
30
-
0.20
V
V
V
%
%
%
ms
Ω
Ω
V
V
Ta=25℃
CIRCUIT
⑧
③
①
④
④
⑨
⑨
⑨
⑦
⑦
⑨
⑨
Unless otherwise stated, V
DD
=EN2=PWM2=3.0V, PWM1=EN1=GND, EXT1=OPEN, FB1=OPEN, V
IN
=1.8V
4/27
XC9501
Series
■ELECTRICAL
CHARACTERISTICS (Continued)
XC9501B092A Common Characteristics
PARAMETER
(* 1)
Supply Voltage
SYMBOL
V
DD
V
DD
≧2.0V
Output Voltage Range
(* 4)
(FOSC = 180kHz)
CONDITIONS
I
OUT
1,2=1mA
I
OUT
1,2=1mA
I
OUT
1,2=1mA
(* 2)
Ta=25℃
CIRCUIT
-
①
②
③
④
④
④
④
④
④
④
④
④
④
④
④
④
④
V
IN
≧0.9V
V
IN
≧0.9V
(* 3)
V
OUT1
, V
OUT2
V
OUT1
V
OUT2
V
OUT1
V
OUT2
Supply Current 1
Supply Current 1-1
Supply Current 1-2
Supply Current 2
Stand-by Current
Oscillation 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
I
DD1
I
DD1-1
I
DD1-2
I
DD2
I
STB
FOSC
V
ENH
V
ENL
I
ENH
I
ENL
I
PWMH
I
PWML
I
FBH
V
FBL
FB1, 2=0V
EN1=3.0V, EN2=0V, FB1=0V
EN2=3.0V, EN1=0V, FB2=0V
FB1=0V, FB2=1.0V
FB1=1V, FB2=0V
FB1, 2=1.0V
Same as I
DD1
, EN1=EN2=0V
Same as I
DD1
FB1, 2=0V
FB1, 2=0V
FB1, 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
0.9
2.0
0.9
0.9
2.0
-
-
-
-
-
153
0.65
-
-
-
-
-
-
-
TYP.
-
-
-
-
-
-
90
60
80
70
-
180
-
-
-
-
-
-
-
-
MAX. UNITS
10.0
V
-
V
10.0
V
-
V
-
V
10.0
V
160
μA
120
150
132
3.0
207
-
0.20
0.50
-0.50
0.50
-0.50
0.50
-0.50
μA
μA
μA
μA
kHz
V
V
μA
μA
μA
μA
μA
μA
Unless otherwise stated, V
DD
=3.0V, PWM1, 2=3.0V, EN1, 2 = 3.0V
Output 1 Characteristics
PARAMETER
FB1 Voltage
Step-Up Controller
SYMBOL
V
FB1
(FOSC = 180kHz)
Ta=25℃
CIRCUIT
⑤
②
①
④
④
⑥
⑥
⑥
⑦
⑦
⑥
⑥
CONDITIONS
MIN.
TYP. MAX. UNITS
V
DD
=3.0V, V
IN
=1.5V, I
OUT1
=10mA
0.882 0.900 0.918
V
Using Tr: 2SD1628,
-
-
0.9
V
Operation Start-up
V
ST1-1
I
OUT
=1.0mA, RFB11=200kΩ, RFB12=75kΩ
(* 2)
Voltage 1
V
DD
≠V
OUT1
: I
OUT1
=1mA
-
-
2.0
V
Oscillation Start Voltage 1
V
ST2-1
FB1=0V
-
-
0.8
V
Maximum Duty Ratio 1
MAXDTY1 Same as I
DD1
75
80
88
%
PFM Duty Ratio 1
PFMDTY1 No Load, VPWM1=0V
22
30
38
%
Efficiency 1
EFFI1
I
OUT1
=100mA N-ch MOSFET: XP161A1355P
-
83
-
%
Soft-Start Time 1
TSS1
V
OUT1
×0.95V,
EN1=0V→0.65V
5.0
10.0
20.0
ms
EXT1 "High" ON Resistance
R
EXTBH1
FB1=0, EXT1=V
DD
-0.4V
-
28
47
Ω
EXT1 "Low" ON Resistance
R
EXTBL1
EN1=FB2=0V, EXT1=0.4V
-
22
30
Ω
PWM1 "High" Voltage
V
PWMH1
No Load
0.65
-
-
V
PWM1 "Low" Voltage
V
PWML1
No Load
-
-
0.20
V
Unless otherwise stated, V
DD
=EN1=PWM1=3.0V, EN2=PWM2=GND, EXT2=OPEN, FB2=OPEN, V
IN
=1.8V
Output 2 Characteristics
PARAMETER
FB2 Voltage
Operation Start-up
(* 3)
Voltage2
Oscillation Start Voltage 2
Maximum Duty Ratio 2
PFM Duty Ratio 2
Efficiency 2
Soft-Start Time 2
EXT2 "High" ON Resistance
EXT2 "Low" ON Resistance
PWM2 "High" Voltage
PWM2 "Low" Voltage
Step-Up Controller
SYMBOL
V
FB2
V
ST1-2
V
ST2-2
MAXDTY2
PFMDTY2
EFFI2
TSS2
R
EXTBH2
R
EXTBL2
V
PWMH2
V
PWML2
CONDITIONS
V
DD
=3.0V, V
IN
=1.5V, I
OUT1
=10mA
Using Tr: 2SD1628,
I
OUT1
=1.0mA, R
FB21
=200kΩ,R
FB22
=75kΩ
V
DD
≠V
OUT2
: I
OUT2
=1mA
FB2=0V
Same as I
DD1
No Load, V
PWM
2=0V
I
OUT2
=100mA, N-ch MOSFET: XP161A1355P
V
OUT1
×
0.95V, EN2=0V→0.65V
FB2=0, EXT2=V
DD
-0.4V
EN2=FB2=0V, EXT2=0.4V
No Load
No Load
(FOSC = 180kHz)
MIN.
0.882
-
-
-
75
22
-
5.0
-
-
0.65
-
TYP.
0.900
-
-
-
80
25
83
10.0
28
22
-
-
MAX. UNITS
0.918
V
0.9
2.0
0.8
85
38
-
20.0
47
30
-
0.20
V
V
V
%
%
%
ms
Ω
Ω
V
V
Ta=25℃
CIRCUIT
⑧
③
①
④
④
⑨
⑨
⑨
⑦
⑦
⑨
⑨
Unless otherwise stated, V
DD
=EN2=PWM2=3.0V, PWM1=EN1=GND, EXT1=OPEN, FB1=OPEN, V
IN
=1.8V
5/27
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