Mar. 17, 2003 Ver. 5
!
Applications
"
2ch DC/DC Controller (Step-up + Step-up)
#
PDAs
"
Input Voltage Range 0.9V ~ 10.0V
#
Palm top computers
"
Output Voltage Externally Set-Up
#
Portable Audio Systems
"
Switching Frequency 180kHz (15%)
#
Various Multi-function Power Supplies
"
Max Duty Ratio 80% (TYP.)
"
PWM, PWM/PFM Switching Control
!
Features
"
High Efficiency 83% (TYP.)
Input Voltage Range
:0.9V ~ 10V
"
MSOP-10 Package
Power Supply Voltage Range :2.0V ~ 10V
Output Voltage Range
:1.5V ~ 30V
!
General Description
Switching Frequency
:180kHz 15%
:300kHz & 500kHz available as custom
Output Current
:more than 200mA(VIN=1.8V, VOUT=3.3V)
Stand-by Current
:
3.0
A (MAX)
Soft-start internally set-up
MSOP-10 Package
!
Typical Performance Characteristics
Efficiency vs. Output Current
!
Typical Application
( XC9501B092A Input: 2 cells, Output
1
: 3.3V, Output
2
: 5.0V )
XC9501 Series
2ch. Step-up DC/DC Controller ICs.
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.
Can be set freely with 0.9V(
2.0%) of reference voltage
supply & external components.
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.
L1:22uH
CDRH5D28
Tr2:Nch MOSFET
XP161A1355P
C
IN
:47
F
V
IN
=1.8V~3.2V
Tr1:Nch
MOSFETXP161A1355P
L2:22
H
CDRH5D28
1 EXT1
2 VDD
3 FB1
FB2 8
GND 9
EXT2 10
4 PWM1
PWM2 7
5 EN1
EN2 6
R
FB21
:82k
R
FB22
:18k
C
FB2
:160pF
47
F
+
V
OUT2
=5.0V
IOUT2=~100mA
SD2
:MA2Q737
C
L2
R
FB11
:200k
R
FB12
:75k
C
FB1
:62pF
47
F
?
+
V
OUT1
=3.3V
IOUT1=~200mA
SD1
:MA2Q737
C
L1
V
PWM1
V
PWM2
V
EN2
V
EN1
XC9501B092A (180kHz,3.3V)
0
10
20
30
40
50
60
70
80
90
100
0.1
1
10
100
1000
Output Current 1 I
OUT1
(mA)
E
f
f
i
c
i
enc
y
1 E
FFI
1 (%
)
VIN=1.8V
2.4V
PWM Control
PWM/PFM Switching Control
L1=22
H(CDRH5D28), C
L1
=47
F(Tantalum)
SD1:MA2Q737, Tr1:XP161A1355P
1
!
Pin Configuration
!
Pin Assignment
!
Ordering Information
XC9501
123456
FB Voltage
0.9V
180kHz
300kHz (custom)
500kHz (custom)
Embossed Tape
Embossed Tape
9
1
R
2
3
Switching Frequency
MSOP-10
2
3
L
Package
5
5
6
4
Standard Feed
Reverse Feed
XC9501 Series
B
0
A
V
DD
3
FB1
4
PWM1
5
Supply Voltage
Channel 2 : PWM/PFM Switching Pin <Control Output 2. PWM control when connected to
VDD, PWM / PFM auto switching when connected to Ground.>
2ch. Step-up DC/DC Controller ICs.
PIN NUMBER
PIN NAME
FUNCTIONS
1
EXT 1
Channel 1: External Transistor Drive Pin <Connected to Nch Power MOSFET Gate>
2
EN1
FB2
9
GND
Ground
DESIGNATOR
SYMBOL
10
6
EN2
7
PWM2
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.>
Channel 2 : External Transistor Drive Pin <Connected to Nch Power MOSFET Gate>
Standard (10 Pin)
DESCRIPTION
EXT 2
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 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 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 1 : PWM/PFM Switching Pin <Control Output 1. PWM control when connected to
V
DD
, PWM / PFM auto switching when connected to Ground. >
8
1 EXT1
2 VDD
3 FB1
FB2 8
GND 9
EXT2 10
4 PWM1
PWM2 7
5 EN1
EN2 6
MSOP-10
(TOP VIEW)
2
!
Block Diagram
!
Absolute Maximum Ratings
Ta=25
O
C
mW
I
EXT
100
mA
Tstg
EXT1, 2 Pin Current
Power Dissipation
Operating Ambient Temperature
Storage Temperature
Pd
150
- 0.3 ~ 12
V
EXT
- 0.3 ~ V
DD
+ 0.3
V
FB1, 2 Pin Voltage
V
V
EN
- 0.3 ~ 12
V
EN1, 2 Pin Voltage
PWM1,2 Pin Voltage
EXT1, 2 Pin Voltage
V
DD
Pin Voltage
V
FB
XC9501 Series
V
PWM
- 0.3 ~ 12
V
- 55 ~ + 125
O
C
O
C
Topr
- 40 ~ + 85
2ch. Step-up DC/DC Controller ICs.
V
DD
SYMBOL
UNITS
- 0.3 ~ 12
V
RATINGS
PARAMETER
PWM1
+
-
FB1
VDD
EXT1
Vref1 = 0.9V
with Soft Start1,
EN1
+
-
PWM/PFM
Controller 1
Vref2 = 0.9V
with Soft Start 1,
EN2
+
-
PWM/PFM
Controller 2
FB2
GND
EXT2
OSC
Generator
Ramp Wave
Generator 1
Ramp Wave
Generator 2
Error Amp2
Error Amp1
PWM
Comparator2
PW
M
Comparator1
EN1
PWM2
EN2
EN1 to
internal circuit
EN2 to
internal circuit
+
-
3
!
Electrical Characteristics
XC9501B092A
Common Characteristics
(FOSC=180kHz)
Ta=25
O
C
V
DD
2.0V, I
OUT
1, 2
=1mA
VOUT1, VOUT2
VOUT1
VOUT2
VOUT1
VOUT2
EN2=3.0V, EN1=0V, FB2=0V
FB1=1.0V, FB2=0V
Unless otherwise stated, VDD=3.0V, PWM1,2=3.0V, EN1, 2 =3.0V
Output 1 Characteristics
Step-up Controller
Ta=25
O
C
Using Tr: 2SD1628,
Unless otherwise stated, VDD=EN1=PWM1=3.0V, EN2=PWM2=GND, EXT2=OPEN, FB2=OPEN, VIN=1.8V
Output 2 Characteristics
Step-up Controller
Ta=25
O
C
Using Tr: 2SD1628,
Unless otherwise stated, VDD=EN2=PWM2=3.0V, PWM1=EN1=GND, EXT1=OPEN, FB1=OPEN, VIN=1.8V
TYP.
TYP.
UNITS
MIN.
V
5.0
-
0.65
28
10.0
9
V
9
FB1 Voltage
PARAMETER
SYMBOL
V
FB1
Soft-Start Time1
EXT1 "Low" ON Resistance
Efficiency1
MAX.
FB1,2 "High" Current
UNITS
PARAMETER
SYMBOL
CONDITIONS
MIN.
I
FBH
FB1,2=3.0V
-
-0.50
-
0.50
-
-
Supply Current 1
I
DD1
FB1,2=0V
-
80
70
-
MIN.
TYP.
-
0.9
PWM1,2 "Low" Current
I
PWML
FB1,2=3.0V,PWM=0V
No Load
FB2=0, EXT2=V
DD
-0.4V
E
FFI
2
Soft-Start Time2
T
SS
2
V
PWMH
2
Efficiency2
7
9
PWM2 "Low" Voltage
V
PWML
2 No Load
-
PWM2 "High" Voltage
EXT2 "High" ON Resistance
R
EXTBH
2
22
-
0.20
-
-
-
47
20.0
30
83
M
AXDTY
2
%
-
IOUT2=100mA, Nch MOSFET:XP161A1355P
80
-
25
38
7
4
4
mS
9
%
9
Oscillation Start-up Voltage2
V
ST
2-2
-
PFM Duty Ratio2
P
FMDTY
2 No Load, V
PWM
2=0V
Maximum Duty Ratio2
FB2=0V
Same as I
DD
1
75
V
2.0
%
V
V
0.8
85
0.9
-
Output Voltage Range
(note 4)
VOUTSET
0.9
PARAMETER
SYMBOL
CONDITIONS
2ch. Step-up DC/DC Controller ICs.
TEST
CIRCUIT
MAX. UNITS
XC9501 Series
-
-
0.9
-
2.0
-
10.0
-
-
60
Supply Current 1-1
I
DD1-1
150
A
FB1=0V, FB2=1.0V
-
Supply Current 1-2
I
DD1-2
120
A
132
A
Supply Current 2
I
DD2
FB1,2=1.0V
-
3.0
A
Stand-by Current
I
STB
Same as I
DD1
, EN1=EN2=0V
-
180
207
kHz
Switching Frequency
FOSC
Same as I
DD1
153
-
-
V
EN1,2 "High" Voltage
VENH
FB1,2=0V
0.65
-
0.20
V
EN1,2 "Low" Voltage
VENL
FB1,2=0V
-
-
0.50
A
EN1,2 "High" Current
IENH
FB1,2=3.0V
-
-
-0.50
A
EN1,2 "Low" Current
IENL
EN1,2=0V, FB1,2=3.0V
-
-
0.50
A
PWM1,2 "High" Current
I
PWMH
FB1,2=3.0V, PWM=3.0V
-
-
-0.50
FB1,2 "Low" Current
VFBL
FB1,2=1V
-
0.882 0.900 0.918
V
Operation Start-up
Voltage1
(note 2)
V
ST
1-1
-
-
I
OUT
=1.0mA, RFB11=200k
, RFB12=75k
-
80
85
V
ST
2-1
0.8
-
V
2.0
V
-
-
0.9
83
10.0
-
30
38
V
DD
V
OUT
2 : I
OUT
2=1mA
28
47
20.0
-
0.900 0.918
-
MAX.
-
FB2 Voltage
V
FB2
V
DD
=3.0V, V
IN
=1.5V, I
OUT2
=10mA
0.882
I
OUT2
=1.0mA, RFB21=200k
,RFB22=75k
PFM Duty Ratio1
P
FMDTY
1 No Load, VPWM1=0V
22
Maximum Duty Ratio1
M
AXDTY
1 Same as I
DD
1
75
Oscillation Start-up Voltage1
-
E
FFI
1
IOUT1=100mA Nch MOSFET:XP161A1355P
-
T
SS
1
V
OUT
1
0.95V, CE1=0V
0.65V
5.0
EXT1 "High" ON Resistance
R
EXTBH
1
0.65
R
EXTBL
1
-
-
22
30
-
0.20
V
PWM1 "Low" Voltage
V
PWML
1 No Load
-
-
Operation Start-up
Voltage2
(note 3)
V
ST
1-2
V
A
90
160
-
10.0
10.0
VIN
0.9V, I
OUT
1, 2=1mA
(note 3)
2.0
PWM1 "High" Voltage
V
PWMH
1
Supply Voltage
(note 1)
V
DD
2.0
V
V
V
-
A
3
4
4
4
4
4
4
4
4
A
A
%
1
2
4
4
V
V
7
4
4
4
4
4
4
2
V
3
6
7
mS
%
%
6
6
22
-
8
1
TEST
CIRCUIT
V
TEST
CIRCUIT
V
6
1
5
6
CONDITIONS
V
DD
V
OUT
1: I
OUT
1=1mA
V
DD
=3.0V, V
IN
=1.5V, I
OUT
1=10mA
VIN
0.9V, I
OUT
1, 2=1mA
(note 2)
EN1=FB2=0V, EXT1=0.4V
FB1=0V
FB1=0, EXT1=V
DD
-0.4V
No Load
EN1=3.0V, EN2=0V, FB1=0V
V
OUT
2
0.95V, EN2=0V
0.65V
EXT2 "Low" ON Resistance
R
EXTBL
2 EN2=FB2=0V, EXT2=0.4V
-
4
!
Electrical Characteristics
XC9501B093A
Common Characteristics
(FOSC=300kHz)
Ta=25
O
C
V
DD
2.0V, I
OUT
1, 2
=1mA
VOUT1, VOUT2
VOUT1
VOUT2
VOUT1
VOUT2
EN2=3.0V, EN1=0V, FB2=0V
FB1=1.0V, FB2=0V
Unless otherwise stated, VDD=3.0V, PWM1,2=3.0V, EN1, 2 =3.0V
Output 1 Characteristics
Step-up Controller
Ta=25
O
C
Using Tr: 2SD1628,
Unless otherwise stated, VDD=EN1=PWM1=3.0V, EN2=PWM2=GND, EXT2=OPEN, FB2=OPEN, VIN=1.8V
Output 2 Characteristics
Step-up Controller
Ta=25
O
C
Using Tr: 2SD1628,
Unless otherwise stated, VDD=EN2=PWM2=3.0V, PWM1=EN1=GND, EXT1=OPEN, FB1=OPEN, VIN=1.8V
-
0.20
V
9
PWM2 "Low" Voltage
V
PWML
2 No Load
-
-
-
V
9
PWM2 "High" Voltage
V
PWMH
2 No Load
0.65
22
30
7
EXT2 "Low" ON Resistance
R
EXTBL
2 EN2=FB2=0V, EXT2=0.4V
-
28
47
7
EXT2 "High" ON Resistance
R
EXTBH
2 FB2=0, EXT2=V
DD
-0.4V
-
10.0
20.0
mS
9
Soft-Start Time2
T
SS
2
V
OUT
2
0.95V, EN2=0V
0.65V
5.0
83
-
%
9
Efficiency2
E
FFI
2
IOUT2=100mA, Nch MOSFET:XP161A1355P
-
30
38
%
9
PFM Duty Ratio2
P
FMDTY
2 No Load, V
PWM
2=0V
22
4
Maximum Duty Ratio2
M
AXDTY
2 Same as I
DD
1
75
80
85
%
4
2.0
V
1
Oscillation Start-up Voltage2
V
ST
2-2
FB2=0V
-
-
0.8
V
0.9
V
3
I
OUT2
=1.0mA, RFB21=200k
,RFB22=75k
Operation Start-up
Voltage2
(note 3)
V
ST
1-2
-
-
V
DD
V
OUT
2 : I
OUT
2=1mA
-
-
0.900 0.918
V
8
FB2 Voltage
V
FB2
V
DD
=3.0V, V
IN
=1.5V, I
OUT2
=10mA
0.882
TYP.
MAX. UNITS
CIRCUIT
PARAMETER
SYMBOL
CONDITIONS
MIN.
-
0.20
V
6
PWM1 "Low" Voltage
V
PWML
1 No Load
-
-
-
V
6
PWM1 "High" Voltage
V
PWMH
1 No Load
0.65
22
30
7
EXT1 "Low" ON Resistance
R
EXTBL
1 EN1=FB2=0V, EXT1=0.4V
-
28
47
7
EXT1 "High" ON Resistance
R
EXTBH
1 FB1=0, EXT1=V
DD
-0.4V
-
10.0
20.0
mS
6
Soft-Start Time1
T
SS
1
V
OUT
1
0.95V, CE1=0V
0.65V
5.0
83
-
%
6
Efficiency1
E
FFI
1
IOUT1=100mA, Nch MOSFET:XP161A1355P
-
30
38
%
6
PFM Duty Ratio1
P
FMDTY
1 No Load, VPWM1=0V
22
4
Maximum Duty Ratio1
M
AXDTY
1 Same as I
DD
1
75
80
85
%
4
2.0
V
1
Oscillation Start-up Voltage1
V
ST
2-1
FB1=0V
-
-
0.8
V
0.9
V
2
I
OUT
=1.0mA, RFB11=200k
, RFB12=75k
Operation Start-up
Voltage1
(note 2)
V
ST
1-1
-
-
V
DD
V
OUT
1: I
OUT
1=1mA
-
-
0.900 0.918
V
5
FB1 Voltage
V
FB1
V
DD
=3.0V, V
IN
=1.5V, I
OUT
1=10mA
0.882
TYP.
MAX. UNITS
CIRCUIT
PARAMETER
SYMBOL
CONDITIONS
MIN.
-
-0.50
A
4
FB1,2 "Low" Current
VFBL
FB1,2=1V
-
-
0.50
A
4
FB1,2 "High" Current
I
FBH
FB1,2=3.0V
-
-
-0.50
A
4
PWM1,2 "Low" Current
I
PWML
FB1,2=3.0V,PWM=0V
-
-
0.50
A
4
PWM1,2 "High" Current
I
PWMH
FB1,2=3.0V, PWM=3.0V
-
-
-0.50
A
4
EN1,2 "Low" Current
IENL
EN1,2=0V, FB1,2=3.0V
-
-
0.50
A
4
EN1,2 "High" Current
IENH
FB1,2=3.0V
-
-
0.20
V
4
EN1,2 "Low" Voltage
VENL
FB1,2=0V
-
-
-
V
4
EN1,2 "High" Voltage
VENH
FB1,2=0V
0.65
300
345
kHz
4
Switching Frequency
FOSC
Same as I
DD1
255
-
3.0
A
4
Stand-by Current
I
STB
Same as I
DD1
, EN1=EN2=0V
-
80
160
A
4
Supply Current 2
I
DD2
FB1,2=1.0V
-
90
200
A
4
FB1=0V, FB2=1.0V
-
Supply Current 1-2
I
DD1-2
80
150
A
4
EN1=3.0V, EN2=0V, FB1=0V
-
Supply Current 1-1
I
DD1-1
110
250
A
4
Supply Current 1
I
DD1
FB1,2=0V
-
3
2.0
-
10.0
V
-
V
VIN
0.9V, I
OUT
1, 2=1mA
(note 3)
0.9
-
-
V
-
V
1
VIN
0.9V, I
OUT
1, 2=1mA
(note 2)
2.0
-
10.0
V
2
0.9
Output Voltage Range
(note 4)
VOUTSET
0.9
-
-
-
10.0
V
Supply Voltage
(note 1)
V
DD
2.0
XC9501 Series
2ch. Step-up DC/DC Controller ICs.
PARAMETER
SYMBOL
CONDITIONS
MIN.
TYP.
MAX. UNITS
CIRCUIT
5
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