XC9501 Series
"
2ch DC/DC Controller (Step-up + Step-up)
"
Input Voltage Range 0.9V ~ 10.0V
"
Output Voltage Externally Set-Up
"
Switching Frequency 180kHz (±15%)
"
Max Duty Ratio 80% (TYP.)
"
PWM, PWM/PFM Switching Control
"
High Efficiency 83% (TYP.)
"
MSOP-10 Package
2ch. Step-up DC/DC Controller ICs.
Mar. 17, 2003 Ver. 5
!
Applications
#
PDAs
#
Palm top computers
#
Portable Audio Systems
#
Various Multi-function Power Supplies
!
Features
Input Voltage Range
:0.9V ~ 10V
Power Supply Voltage Range
:2.0V ~ 10V
Output Voltage Range
:1.5V ~ 30V
Can be set freely with 0.9V(±
2.0%) of reference voltage
supply & external components.
Switching Frequency
Output Current
Stand-by Current
Soft-start internally set-up
MSOP-10 Package
:180kHz ±15%
:300kHz & 500kHz available as custom
:more than 200mA(VIN=1.8V, VOUT=3.3V)
!
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. 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.
:3.0µA
(MAX)
!
Typical Performance Characteristics
Efficiency vs. Output Current
XC9501B092A (180kHz,3.3V)
100
90
80
70
60
50
40
30
20
10
0
L1=22µH(CDRH5D28), C
L1
=47µF(Tantalum)
SD1:MA2Q737, Tr1:XP161A1355P
PWM/PFM Switching Control
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.
Efficiency 1 EFFI1 (%)
VIN=1.8V
PWM Control
2.4V
0.1
1
10
100
1000
!
Typical Application
( XC9501B092A
V
OUT1
=3.3V
IOUT1=~200mA
Output Current 1 I
OUT1
(mA)
Input: 2 cells, Output
SD1
:MA2Q737
1
: 3.3V, Output
2
: 5.0V )
L2:22µH
CDRH5D28
C
IN
:47µF
Tr2:Nch MOSFET
XP161A1355P
SD2
:MA2Q737
V
OUT2
=5.0V
IOUT2=~100mA
L1:22uH
CDRH5D28
V
IN
Tr1:Nch
=1.8V~3.2V
MOSFETXP161A1355P
R
FB11
:200kΩ
C
FB1
:62pF
1 EXT1
EXT2 10
GND 9
FB2 8
PWM2 7
EN2 6
V
PWM2
V
EN2
C
FB2
:160pF
R
FB21
:82kΩ
+
C
L1
47µF
?
V
PWM1
R
FB12
:75kΩ
V
EN1
2 VDD
3 FB1
4 PWM1
5 EN1
+
47µF C
L2
R
FB22
:18kΩ
1
XC9501 Series
!
Pin Configuration
1 EXT1
2 VDD
3 FB1
4 PWM1
5 EN1
EXT2 10
GND 9
FB2 8
PWM2 7
EN2 6
2ch. Step-up DC/DC Controller ICs.
MSOP-10
(TOP VIEW)
!
Pin Assignment
PIN NUMBER
1
2
3
4
5
6
7
8
9
10
PIN NAME
EXT 1
V
DD
FB1
PWM1
EN1
EN2
PWM2
FB2
GND
EXT 2
FUNCTIONS
Channel 1: External Transistor Drive Pin <Connected to Nch 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 resistors between VOUT1 and Ground.>
Channel 1 : PWM/PFM Switching Pin <Control Output 1. PWM control when connected to
V
DD
, PWM / PFM auto switching when connected to Ground. >
Channel 1 : Enable Pin <Connected to VDD when Output 1 is in stand-by mode.
Connected to VDD when Output 1 is active. EXT1 is low when in stand-by mode.>
Channel 2 : Enable Pin <Connected to Ground when Output 2 is in stand-by mode.
Connected to VDD when Output 2 is active.EXT1 is high when in stand-by mode.>
Channel 2 : PWM/PFM Switching Pin <Control Output 2. PWM control when connected to
VDD, PWM / PFM auto switching when connected to Ground.>
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.>
Ground
Channel 2 : External Transistor Drive Pin <Connected to Nch Power MOSFET Gate>
!
Ordering Information
XC9501
123456
DESIGNATOR
SYMBOL
DESCRIPTION
1
2
3
4
5
6
B
0
9
2
3
5
A
R
L
Standard (10 Pin)
FB Voltage
0.9V
Switching Frequency
180kHz
300kHz (custom)
500kHz (custom)
Package
Embossed Tape
Embossed Tape
MSOP-10
Standard Feed
Reverse Feed
2
XC9501 Series
2ch. Step-up DC/DC Controller ICs.
!
Block Diagram
EXT1
PWM/PFM
Controller 1
PWM/PFM
Controller 2
EXT2
VDD
PW
Comparator1
M
PWM
Comparator2
+
-
-
+
GND
FB1
+
-
Error Amp1
Ramp Wave
Generator 1
+
-
Ramp Wave Error Amp2
Generator 2
FB2
PWM1
OSC
Generator
Vref1 = 0.9V
with Soft Start1,
EN1
EN1 to
internal circuit
Vref2 = 0.9V
with Soft Start 1,
EN2
PWM2
EN1
EN2
EN2 to
internal circuit
!
Absolute Maximum Ratings
Ta=25
O
C
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
Power Dissipation
Operating Ambient Temperature
Storage Temperature
SYMBOL
V
DD
V
FB
V
EN
V
PWM
V
EXT
I
EXT
Pd
Topr
Tstg
RATINGS
- 0.3 ~ 12
- 0.3 ~ 12
- 0.3 ~ 12
- 0.3 ~ 12
- 0.3 ~ V
DD
+ 0.3
±
100
150
- 40 ~ + 85
- 55 ~ + 125
UNITS
V
V
V
V
V
mA
mW
O
O
C
C
3
XC9501 Series
!
Electrical Characteristics
Common Characteristics
PARAMETER
Supply Voltage
(note 1)
Output Voltage Range
(note 4)
2ch. Step-up DC/DC Controller ICs.
XC9501B092A
(FOSC=180kHz)
Ta=25
O
C
MAX. UNITS
10.0
V
-
V
10.0
V
-
V
V
-
V
10.0
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
TEST
CIRCUIT
SYMBOL
V
DD
CONDITIONS
Supply Current 1
Supply Current 1-1
Supply Current 1-2
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
Output 1 Characteristics
PARAMETER
FB1 Voltage
Operation Start-up
Voltage1
V
DD
≥
2.0V, I
OUT
1, 2 =1mA
VOUT1, VOUT2
VOUT1
VIN
≥
0.9V, I
OUT
1, 2=1mA
VOUTSET (note 2)
VOUT2
VOUT1
VIN
≥
0.9V, I
OUT
1, 2=1mA
VOUT2
(note 3)
I
DD1
FB1,2=0V
EN1=3.0V, EN2=0V, FB1=0V
I
DD1-1
EN2=3.0V, EN1=0V, FB2=0V
FB1=0V, FB2=1.0V
I
DD1-2
FB1=1.0V, FB2=0V
I
DD2
FB1,2=1.0V
I
STB
Same as I
DD1
, EN1=EN2=0V
FOSC Same as I
DD1
VENH FB1,2=0V
VENL
FB1,2=0V
IENH
FB1,2=3.0V
IENL
EN1,2=0V, FB1,2=3.0V
I
PWMH
FB1,2=3.0V, PWM=3.0V
I
PWML
FB1,2=3.0V,PWM=0V
I
FBH
FB1,2=3.0V
VFBL
FB1,2=1V
Step-up Controller
MIN.
2.0
0.9
2.0
0.9
0.9
2.0
-
-
-
-
-
153
0.65
-
-
-
-
-
-
-
TYP.
-
-
-
-
-
-
90
60
80
70
-
180
-
-
-
-
-
-
-
-
1
2
3
4
4
4
4
4
4
4
4
4
4
4
4
4
4
Unless otherwise stated, VDD=3.0V, PWM1,2=3.0V, EN1, 2 =3.0V
Ta=25
O
C
MIN.
0.882
-
-
-
75
22
-
5.0
-
-
0.65
-
TYP.
0.900
-
-
-
80
30
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
TEST
CIRCUIT
SYMBOL
CONDITIONS
V
FB1
V
DD
=3.0V, V
IN
=1.5V, I
OUT
1=10mA
Using Tr: 2SD1628,
V
ST
1-1 I
OUT
=1.0mA, RFB11=200kΩ, RFB12=75kΩ
(note 2)
V
DD
≠
V
OUT
1: I
OUT
1=1mA
V
ST
2-1 FB1=0V
Oscillation Start-up Voltage1
M
AXDTY
1 Same as I
DD
1
Maximum Duty Ratio1
P
FMDTY
1 No Load, VPWM1=0V
PFM Duty Ratio1
E
FFI
1
Efficiency1
IOUT1=100mA Nch MOSFET:XP161A1355P
T
SS
1
V
OUT
1
×
0.95V, CE1=0V→0.65V
Soft-Start Time1
EXT1 "High" ON Resistance
R
EXTBH
1 FB1=0, EXT1=V
DD
-0.4V
EXT1 "Low" ON Resistance
R
EXTBL
1 EN1=FB2=0V, EXT1=0.4V
V
PWMH
1 No Load
PWM1 "High" Voltage
V
PWML
1 No Load
PWM1 "Low" Voltage
Output 2 Characteristics
PARAMETER
FB2 Voltage
Operation Start-up
Voltage2
Step-up Controller
5
2
1
4
4
6
6
6
7
7
6
6
Unless otherwise stated, VDD=EN1=PWM1=3.0V, EN2=PWM2=GND, EXT2=OPEN, FB2=OPEN, VIN=1.8V
Ta=25
O
C
MIN.
0.882
-
-
-
75
22
-
5.0
-
-
0.65
-
TYP.
0.900
-
-
-
80
25
83
10.0
28
22
-
-
MAX. UNITS
V
0.918
0.9
2.0
0.8
85
38
-
20.0
47
30
-
0.20
V
V
V
%
%
%
mS
Ω
Ω
V
V
TEST
CIRCUIT
SYMBOL
CONDITIONS
V
DD
=3.0V, V
IN
=1.5V, I
OUT2
=10mA
V
FB2
Using Tr: 2SD1628,
V
ST
1-2 I
OUT2
=1.0mA, RFB21=200kΩ,RFB22=75kΩ
(note 3)
V
DD
≠
V
OUT
2 : I
OUT
2=1mA
V
ST
2-2 FB2=0V
Oscillation Start-up Voltage2
M
AXDTY
2 Same as I
DD
1
Maximum Duty Ratio2
P
FMDTY
2 No Load, V
PWM
2=0V
PFM Duty Ratio2
E
FFI
2
IOUT2=100mA, Nch MOSFET:XP161A1355P
Efficiency2
T
SS
2
V
OUT
2
×
0.95V, EN2=0V→0.65V
Soft-Start Time2
EXT2 "High" ON Resistance
R
EXTBH
2 FB2=0, EXT2=V
DD
-0.4V
EXT2 "Low" ON Resistance
R
EXTBL
2 EN2=FB2=0V, EXT2=0.4V
V
PWMH
2 No Load
PWM2 "High" Voltage
V
PWML
2 No Load
PWM2 "Low" Voltage
8
3
1
4
4
9
9
9
7
7
9
9
Unless otherwise stated, VDD=EN2=PWM2=3.0V, PWM1=EN1=GND, EXT1=OPEN, FB1=OPEN, VIN=1.8V
4
XC9501 Series
!
Electrical Characteristics
Common Characteristics
PARAMETER
Supply Voltage
(note 1)
Output Voltage Range
(note 4)
2ch. Step-up DC/DC Controller ICs.
XC9501B093A
CONDITIONS
(FOSC=300kHz)
Ta=25
O
C
MIN. TYP. MAX. UNITS
CIRCUIT
-
10.0
V
2.0
0.9
-
-
V
1
2.0
-
10.0
V
2
-
-
V
0.9
0.9
-
-
V
3
2.0
-
10.0
V
-
110
250
µA
4
-
-
-
-
255
0.65
-
-
-
-
-
-
-
80
90
80
-
300
-
-
-
-
-
-
-
-
150
200
160
3.0
345
-
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
SYMBOL
V
DD
Supply Current 1
Supply Current 1-1
Supply Current 1-2
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
V
DD
≥
2.0V, I
OUT
1, 2 =1mA
VOUT1, VOUT2
VOUT1
VIN
≥
0.9V, I
OUT
1, 2=1mA
VOUTSET (note 2)
VOUT2
VOUT1
VIN
≥
0.9V, I
OUT
1, 2=1mA
VOUT2
(note 3)
I
DD1
FB1,2=0V
EN1=3.0V, EN2=0V, FB1=0V
I
DD1-1
EN2=3.0V, EN1=0V, FB2=0V
FB1=0V, FB2=1.0V
I
DD1-2
FB1=1.0V, FB2=0V
I
DD2
FB1,2=1.0V
I
STB
Same as I
DD1
, EN1=EN2=0V
FOSC Same as I
DD1
VENH FB1,2=0V
VENL
FB1,2=0V
IENH
FB1,2=3.0V
IENL
EN1,2=0V, FB1,2=3.0V
I
PWMH
FB1,2=3.0V, PWM=3.0V
I
PWML
FB1,2=3.0V,PWM=0V
I
FBH
FB1,2=3.0V
VFBL
FB1,2=1V
4
4
4
4
4
4
4
4
4
4
4
4
4
Unless otherwise stated, VDD=3.0V, PWM1,2=3.0V, EN1, 2 =3.0V
Output 1 Characteristics
PARAMETER
FB1 Voltage
Operation Start-up
Voltage1
(note 2)
SYMBOL
V
FB1
V
ST
1-1
Oscillation Start-up Voltage1
V
ST
2-1
M
AXDTY
1
Maximum Duty Ratio1
P
FMDTY
1
PFM Duty Ratio1
E
FFI
1
Efficiency1
T
SS
1
Soft-Start Time1
EXT1 "High" ON Resistance
R
EXTBH
1
EXT1 "Low" ON Resistance
R
EXTBL
1
V
PWMH
1
PWM1 "High" Voltage
V
PWML
1
PWM1 "Low" Voltage
Step-up Controller
CONDITIONS
V
DD
=3.0V, V
IN
=1.5V, I
OUT
1=10mA
Using Tr: 2SD1628,
I
OUT
=1.0mA, RFB11=200kΩ, RFB12=75kΩ
V
DD
≠
V
OUT
1: I
OUT
1=1mA
FB1=0V
Same as I
DD
1
No Load, VPWM1=0V
IOUT1=100mA, Nch MOSFET:XP161A1355P
V
OUT
1
×
0.95V, CE1=0V→0.65V
FB1=0, EXT1=V
DD
-0.4V
EN1=FB2=0V, EXT1=0.4V
No Load
No Load
MIN.
0.882
-
-
-
75
22
-
5.0
-
-
0.65
-
TYP.
0.900
-
-
-
80
30
83
10.0
28
22
-
-
Ta=25
O
C
MAX. UNITS
CIRCUIT
5
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
2
1
4
4
6
6
6
7
7
6
6
Unless otherwise stated, VDD=EN1=PWM1=3.0V, EN2=PWM2=GND, EXT2=OPEN, FB2=OPEN, VIN=1.8V
Output 2 Characteristics
PARAMETER
FB2 Voltage
Operation Start-up
Voltage2
(note 3)
Oscillation Start-up Voltage2
SYMBOL
V
FB2
V
ST
1-2
V
ST
2-2
M
AXDTY
2
Maximum Duty Ratio2
P
FMDTY
2
PFM Duty Ratio2
E
FFI
2
Efficiency2
T
SS
2
Soft-Start Time2
EXT2 "High" ON Resistance
R
EXTBH
2
EXT2 "Low" ON Resistance
R
EXTBL
2
V
PWMH
2
PWM2 "High" Voltage
V
PWML
2
PWM2 "Low" Voltage
Step-up Controller
CONDITIONS
V
DD
=3.0V, V
IN
=1.5V, I
OUT2
=10mA
Using Tr: 2SD1628,
I
OUT2
=1.0mA, RFB21=200kΩ,RFB22=75kΩ
V
DD
≠
V
OUT
2 : I
OUT
2=1mA
FB2=0V
Same as I
DD
1
No Load, V
PWM
2=0V
IOUT2=100mA, Nch MOSFET:XP161A1355P
V
OUT
2
×
0.95V, EN2=0V→0.65V
FB2=0, EXT2=V
DD
-0.4V
EN2=FB2=0V, EXT2=0.4V
No Load
No Load
MIN.
0.882
-
-
-
75
22
-
5.0
-
-
0.65
-
TYP.
0.900
-
-
-
80
30
83
10.0
28
22
-
-
Ta=25
O
C
MAX. UNITS
CIRCUIT
8
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
3
1
4
4
9
9
9
7
7
9
9
Unless otherwise stated, VDD=EN2=PWM2=3.0V, PWM1=EN1=GND, EXT1=OPEN, FB1=OPEN, VIN=1.8V
5
