July 4 , 2003 Ver. 3
APPLICATIONS
Synchronous Step-Down DC/DC Conrollers
Input Voltage Range
2.0V ~ 10V
PDAs
Maximum Duty Cycle
Output Voltage Externally Set-up
Palmtop computers
Oscillation Frequency
300kHz (Accuracy 15%)
PWM, PWM/PFM Externally Selectable
100% (TYP.)
Portable audios
Synchronous Rectification Control
High Efficiency
95% (TYP.)
Various power supplies
Small MSOP-8A Packaging
GENERAL DESCRIPTION
FEATURES
Input Voltage Range
: 2.0V ~ 10V
Output Voltage Range
: 0.9V ~ 6.0V
Oscillation Frequency
: 300kHz
15%
(180kHz is available as custom)
Output Current
: More than 2A
(VIN = 5.0V, VOUT=3.3V)
Stand-By Function
: 3.0
A (MAX.)
Package
: MSOP-8A
Soft-start internally set-up
: 10 ms (internally set-up)
TYPICAL APPLICATION CIRCUIT
TYPICAL PERFORMANCE CHARACTERISTICS
<XC9210B093, VOUT:3.3V)
Efficiency vs. Output Current
1
Synchronous Step-Down DC / DC Controller ICs
The XC9210 has an 0.9V (2.0%) internal voltage, and using
externally connected components, the output voltage can be set
freely between 0.9V to 6.0V. With an internal switching frequency of
300kHz and 180kHz (custom) smaller, low cost external components
can also be used.
The operation of the XC9210 series can be switched between PWM
and PWM/PFM externally using the MODE pin. In PWM/PFM mode
the XC9210 automatically switches from PWM to PFM during light
loads and high efficiencies can be achieved over a wide range of load
conditions. Output noise is reduced in PWM operation as the
frequency is fixed.
XC9210 Series
Can be set freely with 0.9V
(
2.0%) of reference voltage supply
and external components.
The XC9210 is a synchronous PWM, PWM/PFM controller designed
for low voltage step-down DC/DC converter applications. High
efficiency is obtained through the use of a synchronous rectification
topology. Efficiencies are maximised by using the low RDSon N-
Channel MOSFET switch which replaces the catch diode used in
standard buck circuits.
Soft-start time is internally set to 10msec offering protection against
in-rush currents during start-up and preventing voltage overshoot.
VDD
EXT1
PWM
CE
GND
EXT2
FB
MODE
PWM
CE
MODE
L:22
H
CDRH125
Tr1:Pch MOSFET
:CPH3308
RFB
:75k
Tr2:Nch MOSFET
:CPH3408
C
IN
:47
F
V
IN
:3.3V~10V
CL:
47
FX2
RFB1
:200k
CFB
:62pF
V
OUT
:3.3V
XC9210B093K (300kHz, 3.3V)
0
10
20
30
40
50
60
70
80
90
100
0.1
1
10
100
1000
10000
Output Current I
OUT
(mA)
Effi
ci
e
n
cy EF
F
I
(
%
)
8.0V
VIN=5.0V
Tr1:CPH3308, Tr2:CPH3408
L=22uH(CDRH125), CL=94uF(Tantalum)
PWM/PFM Switching Control
Synchronous PWM Control
Semiconductor Ltd.
PIN CONFIGURATION
PIN ASSIGNMENT
ORDERING INFORMATION
XC9210
123456
DESCRIPTION
FB Voltage
0.9V
PACKAGE INFORMATION
MSPO-8A
2
XC9210 Series
Synchronous Step-Down DC / DC Controller ICs
6
R
Embossed Tape
Standard Feed
L
5
K
Package
MSOP-8A
3
9
4
2
3
1
B
Standard
2
0
DESIGNATOR SYMBOL
7
GND
8
EXT 2
5
MODE
6
FB
4
CE
3
PWM
External Transistor Drive Pin <Connected to High Side of Pch Power MOSFET Gate>
FUNCTIONS
2
VDD
Supply Voltage
PIN NUMBER
PIN NAME
1
EXT 1 /
PWM/PFM Switching Pin <PWM control when connected to VDD, PWM / PFM auto switching when connected
to Ground. >
Chip Enable Pin <Connected to Ground when output is stand-by mode. Connected to VDD when output is
active. EXT/1 is high and EXT2/ is low when in stand-by mode.>
Synchronous / Non-Synchronous Rectification Switching Pin <Synchronous operation when MODE pin and
PWM pin are connected to VDD, Non-Synchronous operation when MODE pin and PWM pin are connected to
Ground. Regardless of MODE pin, Non-Synchronous operation when PWM pin is connected to Ground.
Output Voltage Monitor Feedback Pin <Threshold value : 0.9V. Output voltage can be set freely by connecting
split resistors between VOUT and Ground.>
Ground
External Transistor Drive Pin <Connected to Low side of Nch Power MOSFET Gate>
Switching Frequency
180kHz (custom)
300kHz
Reverse Feed
1 EXT1
2 VDD
3 PWM
FB 6
GND 7
EXT2 8
4 CE
MODE 8
MSOP-8A
(TOP VIEW)
-
3.00 + 0.10
0.30
(0.65)
3.
0
0
+
0.
10
4.
9
0
+
0.
10
+0.08
-0.02
0.
00 ~
0.
20
0 ~ 6
O
0.
86
1.
02
+0.
1
1
-0
.
1
0
+0.20 -0
.
2
1
0.
5
3
+
0.
13
0.15
+0.08
-0.02
Semiconductor Ltd.
BLOCK DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Ta=25
O
C
3
V
EXT
- 0.3 ~ V
DD
+ 0.3
V
XC9210 Series
Synchronous Step-Down DC / DC Controller ICs
O
C
Storage Temperature
I
EXT
100
mA
Pd
150
mW
VMODE
- 0.3 ~ 12
V
MODE Pin Voltage
V
PWM
- 0.3 ~ 12
V
PWM Pin Voltage
VC
E
- 0.3 ~ 12
V
CE Pin Voltage
V
FB
- 0.3 ~ 12
V
FB Pin Voltage
V
DD
- 0.3 ~ 12
V
V
DD
Pin Voltage
SYMBOL
RATINGS
UNITS
PARAMETER
EXT1, 2 Pin Voltage
EXT1, 2 Pin Current
Power Dissipation
Operating Ambient Temperature
Topr
- 40 ~ + 85
O
C
Tstg
- 55 ~ +125
+
-
FB
EXT1/
Vref=0.9V
withSoft Start,
CE
GND
EXT2
Ramp Wave
Generator,
OSC
Error Amp
PWM
Comparator
CE
PWM
CE to
internal circuit
+
-
PWM/PFM
Controller
MODE
Synchronous,
blank logic
VIN
Semiconductor Ltd.
ELECTRICAL CHARACTERISTICS
XC9210B093
(FOSC = 300kHz)
Ta=25
O
C
VOUT
Unless otherwise stated, VDD = 3.0V, CE = 3.0V, PWM = 3.0V, FB = 3.0V, EXT1, 2=OPEN, MODE = 3.0V, VIN=4.2V
Notes 1)
2)
3)
Tr1 : CPH3308
(SANYO)
Tr2 : CPH3408
(SANYO)
L : 22
H
(SUMIDA CDRH125)
CL : 16V, 47
F x 2
(NICHICEMI Tantalum MCE Series)
CIN : 16V, 47
F
(NICHICEMI Tantalum MCE Series)
RFB1 : 200k
RFB2 : 75k
CFB : 62pF
4
-
0
%
2
Minimum Duty Ratio
MINDTY
Same as IDD2
-
-
-
%
2
Maximum Duty Ratio
MAXDTY
Same as IDD1
100
-
2.0
V
1
Minimum Operation Voltage
VINmin
-
0.900
0.918
V
3
FB Voltage
VFB
VIN=3.0V, IOUT=10mA
0.882
-
-
Please be careful not to exceed the breakdown voltage level of the peripheral parts.
EFFI={ [ (Output voltage) x (Output current) ] / [ (Input voltage) x (Input Current) ] } x 100
FB "Low" Current
2
31
-
19
30
5
-
VIN
2.0V, MODE = 0V, IOUT=1mA
-
V
4
2
EXT2 = VDD - 0.4V
IFBH
FB "High" Current
MODE "Low" Current
MODE "High" Current
IMODEL
CE "Low" Current
ICEH
CE "High" Current
PWM "Low" Current
PWM "High" Current
IMODEH
VOUTSET
EXT2 "High" ON Resistance
EXT1 "Low" ON Resistance
EXT1 "High" ON Resistance
Soft-Start Time
REXTBH2
REXTBL2
VMODEH
VMODEL
VPWMH
VPWML
IFBL
-
0.5
-
-
- 0.5
-
FB = 1.0V
MODE = 0V
-
EXT2 "Low" ON Resistance
PWM "High" Voltage
No Load
5
2
5
4
4
A
2
A
2
19
30
A
-
- 0.50
0.50
A
A
V
-
MIN.
XC9210 Series
Synchronous Step-Down DC / DC Controller ICs
A
2
-
0.20
4
-
-
MODE "Low" Voltage
0.65
PWM "Low" Voltage
No Load
-
No Load
0.65
MODE "High" Voltage
No Load
-
REXTBL1
REXTBH1
V
-
0.20
V
CE = 0V, EXT2 = VDD - 0.4V
-
23
CE1 = 0, EXT1= VDD - 0.4V
-
FB = 0V, EXT1 = 0.4V
-
4
10.0
20.0
5
26
37
VOUT
0.95V, CE=0V
0.65V
5.0
TSS
%
EFFI
mS
96
-
IOUT1=300mA (note 3)
-
Efficiency1 (note 2 )
%
4
30
38
No Load, VPWM=0V
22
PFMDTY
PFM Duty Ratio
4
PWM=0V
-
A
2
IPWML
A
2
-
0.5
-
IPWMH
-
- 0.5
- 0.5
CE = 0V
-
ICEL
-
0.5
-
V
2
-
0.2
FB = 0V
-
VCEL
CE "Low" Voltage
V
2
-
-
FB = 0V
0.65
VCEH
CE "High" Voltage
kHz
2
300
345
Same as IDD1
255
FOSC
Oscillation Frequency
A
2
-
3.0
Same as IDD1, CE = 0V
-
ISTB
Stand-by Current
A
2
65
120
FB = 1.0V
-
IDD2
Supply Current 2
A
2
FB = 0V
IDD1
120
-
65
1
-
-
Supply Current 1
V
1
-
VIN
0.9
Output Voltage Range(note 1)
V
V
2.0
-
10.0
SYMBOL
PARAMETER
MODE = 0V
10.0
Maximum Input Voltage
VDD
VIN
1
MODE = 0V
Supply Voltage
CONDITIONS
UNITS
TEST
CIRCUIT
MAX.
TYP.
Semiconductor Ltd.
XC9210B092
(FOSC = 180kHz)
Ta=25
O
C
VOUT
Unless otherwise stated, VDD = 3.0V, CE = 3.0V, PWM = 3.0V, FB = 3.0V, EXT1,2 = OPEN, MODE = 3.0V, VIN=4.2V
Notes 1)
2)
3)
Tr1 : CPH3308
(SANYO)
Tr2 : CPH3408
(SANYO)
L : 22
H
(SUMIDA CDRH125)
CL : 16V, 47
F x 2
(NICHICEMI Tantalum MCE Series)
CIN : 16V, 47
F
(NICHICEMI Tantalum MCE Series)
RFB1 : 200k
RFB2 : 75k
CFB : 62pF
5
-
0.20
V
4
MODE "Low" Voltage
VMODEL
No Load
-
-
-
V
4
MODE "High" Voltage
VMODEH
No Load
0.65
FB "Low" Current
IFBL
FB = 1.0V
-
-
- 0.50
A
2
Please be careful not to exceed the breakdown voltage level of the peripheral parts.
EFFI={ [ (Output voltage) x (Output current) ] / [ (Input voltage) x (Input Current) ] } x 100
-
0.20
-
- 0.50
MODE "Low" Current
IMODEL
MODE = 0V
-
V
4
PWM "Low" Voltage
VPWML
No Load
-
5
PWM "High" Voltage
VPWMH
No Load
0.65
-
-
V
4
5
EXT2 "High" ON Resistance
REXTBH2
EXT2 = VDD - 0.4V
-
23
31
5
mS
4
EXT1 "High" ON Resistance
REXTBH1
CE1 = 0, EXT1= VDD - 0.4V
-
26
37
5
%
4
Efficiency1 (note 2)
EFFI
IOUT1=300mA (note 3)
-
96
-
%
4
%
2
Minimum Duty Ratio
MINDTY
Same as IDD2
-
-
0
%
2
-
2.0
V
1
Minimum Operation Voltage
VINmin
-
A
2
V
3
A
2
A
2
A
2
-
0.50
A
2
MODE "High" Current
IMODEH
-
PWM "Low" Current
IPWML
PWM=0V
-
-
- 0.50
A
2
CE "Low" Current
ICEL
CE = 0V
-
-
- 0.50
A
2
V
2
CE "Low" Voltage
VCEL
FB = 0V
-
-
0.20
V
2
A
2
Oscillation Frequency
FOSC
Same as IDD1
153
180
207
kHz
2
A
2
Supply Current 2
IDD2
FB = 1.0V
-
45
105
A
2
V
1
Output Voltage Range(note 1)
VOUTSET
VIN
2.0V, MODE = 0V, IOUT=1mA
0.9
-
VIN
V
1
-
10.0
V
1
Supply Voltage
VDD
MODE = 0V
2.0
UNITS
TEST
CIRCUIT
TYP.
MAX.
XC9210 Series
Synchronous Step-Down DC / DC Controller ICs
PARAMETER
SYMBOL
CONDITIONS
MIN.
-
19
30
EXT2 "Low" ON Resistance
REXTBL2
CE = 0V, EXT2 = VDD - 0.4V
-
19
30
EXT1 "Low" ON Resistance
REXTBL1
FB = 0V, EXT1 = 0.4V
5.0
10.0
20.0
Soft-Start Time
TSS
VOUT1
0.95V, CE=0V
0.65V
22
30
38
PFM Duty Ratio
PFMDTY
No Load, VPWM=0V
100
-
-
Maximum Duty Ratio
MAXDTY
Same as IDD1
0.882
0.900
0.918
FB Voltage
VFB
VIN=3.0V, IOUT=10mA
-
-
0.50
FB "High" Current
IFBH
-
-
0.50
PWM "High" Current
IPWMH
-
-
0.50
CE "High" Current
ICEH
0.65
-
-
CE "High" Voltage
VCEH
FB = 0V
-
-
3.0
Stand-by Current
ISTB
Same as IDD1, CE = 0V
-
45
105
Supply Current 1
IDD1
FB = 0V
10.0
-
-
Maximum Input Voltage
VIN
MODE = 0V
Semiconductor Ltd.
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