XC9101
Series
PWM Controlled Step-Up DC/DC Controllers
ETR0403_003
■GENERAL
DESCRIPTION
The XC9101 series are step-up multiple current and voltage feedback DC/DC controller ICs. Current sense, clock
frequencies and amp feedback gain can all be externally regulated.
A stable power supply is possible with output currents of up to 1.5A.
With output voltage fixed internally, V
OUT
is selectable in 100mV increments within a 2.5V ~ 16.0V range (±2.5%).
For output voltages outside this range, we recommend the FB version, which has a 0.9V internal reference voltage. Using this
version, the required output voltage can be set-up using 2 external resistors.
Switching frequencies can also be set-up externally within a range of 100 ~ 600kHz and therefore frequencies suited to your
particular application can be selected.
With the current sense function, peak currents (which flow through the driver transistor and the coil) can be controlled.
Soft-start time can be adjusted using external resistor and capacitor.
During shutdown (CE pin=L), consumption current can be reduced to as little as 0.5μA (TYP.) or less.
■APPLICATIONS
●Mobile,
Cordless phones
●Palm
top computers, PDAs
●Portable
games
●Cameras,
Digital cameras
●Note
book PCs
■FEATURES
Stable Operations via Current & Voltage
Multiple Feedback
Unlimited Options for Peripheral Selection
Current Protection Circuit
Ceramic Capacitor Compatible
Input Voltage Range
: 2.5V ~ 20V
(Fixed Voltage Type)
: 30V + (Adjustable Type)
Oscillation Frequency Range
: 100kHz ~ 600kHz
Output Current
Package
: Up to 1.5A
: MSOP-8A, SOP-8
Output Voltage Range
: 2.5V ~ 16V
■TYPICAL
APPLICATION CIRCUIT
■TYPICAL
PERFORMANCE
CHARACTERISTICS
V
OUT
: 5.0V, FOSC: 180KHz
1/22
XC9101
Series
■PIN
CONFIGURATION
MSOP-8A
(TOP VIEW)
SOP-8
(TOP VIEW)
■PIN
ASSIGNMENT
PIN NUMBER
MSOP-8A
SOP-8
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
PIN NAME
EXT
Isen
V
IN
CE/SS
C
LK
CC/GAIN
V
OUT
/FB
VSS
FUNCTION
Driver
Current Sense
Power Input
CE/Soft Start
Clock Input
Phase Compensation
Voltage Sense
Ground
■PRODUCT
CLASSIFICATION
●Ordering
Information
XC9101①②③④⑤⑥
DESIGNATOR
①
DESCRIPTION
Type of DC/DC Controllers
SYMBOL
C
D
Integer
② ③
Output Voltage
A~H
④
⑤
⑥
Oscillation Frequency
Package
Device Orientation
A
K
S
R
L
DESCRIPTION
: V
OUT
(Fixed voltage type), Soft-start externally set-up
: FB voltage, Soft-start externally set-up
: e.g. V
OUT
=2.3V→②=2,
③=3
FB products→②=0,
③=9
fixed
: Voltages above 10V
→10=A,
11=B, 12=C, 13=D, 14=E, 15=F, 16=H
e.g. V
OUT
=13.5V
→ ②=D, ③=5
: Adjustable
: MSOP-8A
: SOP-8
: Embossed tape, standard feed
: Embossed tape, reverse feed
The standard output voltages of the XC9101C series are 2.5V, 3.3V, and 5.0V.
Voltages other than those listed are semi-custom.
2/22
XC9101
Series
■ELECTRICAL
CHARACTERISTICS
XC9101C33AKR
PARAMETER
Output Voltage
Maximum
Operating Voltage
Minimum
Operating Voltage
Supply Current 1
Supply Current 2
Stand-by Current
CLK
Oscillation Frequency
Frequency
Line Regulation
Frequency
Temperature Fluctuation
Maximum Duty Cycle
Minimum Duty Cycle
Current Limit Voltage
I
SEN
Current
CE "High" Current
CE "Low" Current
CE "High" Voltage
CE "Low" Voltage
EXT "High" ON
Resistance
EXT "Low" ON
Resistance
Efficiency (*1)
Soft-Start Time
CC/GAIN Pin
Output Impedance
Ta=25℃
SYMBOL
V
OUT
V
INmax
V
INmin
I
DD1
I
DD2
ISTB
FOSC
ΔFOSC
ΔV
IN
½FOSC
ΔFOSC
ΔTopr½FOSC
CONDITIONS
I
OUT
=300mA
MIN.
3.218
20
－
TYP.
3.300
－
－
150
90
0.5
MAX.
3.382
－
2.5
255
176
2.0
380
－
－
89
0
220
13
0.1
0.1
－
0.2
58
45
－
20
－
UNITS
V
V
V
μA
μA
μA
kHz
%
%
%
%
mV
μA
μA
μA
V
V
Ω
Ω
%
ms
kΩ
CIRCUITS
①
①
①
②
②
②
③
③
③
④
④
⑥
⑥
⑤
⑤
⑤
⑤
④
④
①
①
⑦
V
IN
=2.5V, V
OUT=
CE
=
Setting Output Voltage
×
0.95V
V
IN
=2.5V, CE=V
IN
V
OUT=
Setting Output Voltage
×
1.05V
V
IN
=2.5V, CE=V
OUT
=V
SS
RT=10.0kΩ, CT=220pF
V
IN
=2.5V ~ 20V
V
IN
=2.5V
Topr=-40 ~ +85℃
V
OUT
=Set Voltage×0.95V
V
OUT
=Set Voltage×1.05V
V
IN
pin voltage－I
SEN
pin voltage
V
IN
=2.5V, I
SEN
=2.5V
CE=V
IN
=2.5V, V
OUT
=0V
CE=0V, V
IN
=2.5V, V
OUT
=0V
CLK Oscillation Starts,
V
OUT
=0V, CE: Voltage applied
CLK Oscillation Stops,
V
OUT
=0V, CE: Voltage applied
EXT=V
IN
－0.4V,
CE=V
IN
=2.5V
V
OUT
=Setting voltage×0.95V
EXT=0.4V, CE=V
IN
=2.5V
V
OUT
=Setting voltage×1.05
Connect C
SS
and R
SS
,
CE : 0V→2.5V
－
－
280
－
－
79
－
90
4.5
-0.1
-0.1
0.6
－
－
－
－
5
－
330
±5
±5
85
－
150
7
0
0
－
－
31
27
88
10
400
MAXDTY
MINDTY
I
LIM
I
ISEN
I
CEH
I
CEL
V
CEH
V
CEL
R
EXTH
R
EXTL
EFFI
T
SS
R
CCGAIN
Unless otherwise stated, V
IN
= 2.5V
NOTE:
*1: EFFI = {[(output voltage)
×
(output current)]
÷
[(input voltage)
×
(input current)]}
×
100
*2: The capacity range of the capacitor used to set the external CLK frequency is 150 ~ 220pF
4/22
XC9101
Series
■ELECTRICAL
CHARACTERISTICS (Continued)
XC9101C50AKR
PARAMETER
Output Voltage
Maximum
Operating Voltage
Minimum
Operating Voltage
Supply Current 1
Supply Current 2
Stand-by Current
CLK
Oscillation Frequency
Frequency
Line Regulation
Frequency
Temperature Fluctuation
Maximum Duty Cycle
Minimum Duty Cycle
Current Limit Voltage
I
SEN
Current
CE "High" Current
CE "Low" Current
CE "High" Voltage
CE "Low" Voltage
EXT "High"
ON Resistance
EXT "Low"
ON Resistance
Efficiency *1
Soft-Start Time
CC/GAIN Pin
Output Impedance
SYMBOL
V
OUT
V
INmax
V
INmin
I
DD1
I
DD2
ISTB
FOSC
ΔFOSC
ΔV
IN
½FOSC
ΔFOSC
ΔTopr½FOSC
Ta=25℃
CONDITIONS
I
OUT
=300mA
MIN.
4.875
20
－
V
IN
=3.0V, V
OUT
=CE=
Setting Output Voltage×0.95V
V
IN
=3.0V, CE=V
IN
V
OUT=
Setting Output Voltage
×
1.05V
VIN=3.0V, CE=VOUT=VSS
RT=10.0kΩ, CT=220pF
V
IN
=2.5V½20V
V
IN
=2.5V
Topr=-40½+85℃
V
OUT
=Setting Voltage×0.95V
V
OUT
=Setting Voltage×1.05V
V
IN
pin voltage－I
SEN
pin voltage
V
IN
=3.0V, I
SEN
=3.0V
CE=V
IN
=3.0V, V
OUT
=0V
CE=0V, V
IN
=3.0V, V
OUT
=0V
CLK Oscillation Starts,
V
OUT
=0V, CE: Voltage applied
CLK Oscillation Stops,
V
OUT
=0V, CE: Voltage applied
EXT=V
IN
－0.4V,
CE=V
IN
=3.0V
V
OUT
=Setting voltage×0.95V
EXT=0.4V, CE=V
IN
=3.0V
V
OUT
=Setting voltage×1.05V
Connect C
SS
and R
SS
,
CE: 0V→3.0V
－
－
－
280
－
－
79
－
90
4.5
-0.1
-0.1
0.6
－
－
－
－
－
－
TYP.
5.000
－
－
160
90
0.5
330
±5
±5
85
－
150
7
0
0
－
－
27
25
87
5
400
MAX.
5.125
－
2.5
270
176
2.0
380
－
－
89
0
220
13
0.1
0.1
－
0.2
51
37
－
－
－
UNITS
V
V
V
μA
μA
μA
kHz
%
%
%
%
mV
μA
μA
μA
V
V
Ω
Ω
%
ms
kΩ
CIRCUITS
①
①
①
②
②
②
③
③
③
④
④
⑥
⑥
⑤
⑤
⑤
⑤
④
④
①
①
⑦
MAXDTY
MINDTY
I
LIM
I
ISEN
I
CEH
I
CEL
V
CEH
V
CEL
R
EXTH
R
EXTL
EFFI
T
SS
R
CCGAIN
NOTE: Unless otherwise stated, V
IN
= 3.0V.
*1: EFFI = {[(output voltage)
×
(output current)]
÷
[(input voltage)
×
(input current)]}
×
100
*2: The capacity range of the capacitor used to set the external CLK frequency is 150 ~ 220pF
5/22
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