XC9103/XC9104/XC9105
Series
Ceramic Capacitor Compatible, Step-up DC/DC Controllers
ETR0404_003
☆GreenOperation
Compatible
The XC9103/XC9104/XC9105 series are PWM, PWM/PFM auto switching /manual switching controlled universal step-up
DC/DC converter controllers.
Output will be stable no matter which load capacitors are used but should a low ESR capacitor be used, R
SENSE
of about 0.1Ω
will be required and phase compensation will be achieved. This allows the use of ceramic capacitors and enables to obtain lower
output ripple and small PCB design. Tantalum and electrolytic capacitors can also be used, in which case, R
SENSE
becomes
unnecessary.
With 0.9V internal voltage reference and by using externally connected two resistors, output voltage can be set freely within a
range of 1.5V to 30V. The series is available in 300 kHz and 180 kHz frequencies, the size of the external components can be
reduced. 100 kHz and 500 kHz are also available in custom options.
The XC9103 offers PWM operation. The XC9104 offers PWM/PFM automatic switching operation. The PWM operation is shifted to
the PFM operation automatically at light load so that it maintains high efficiency over a wide range of load currents. The XC9105
offers both PWM and PWM/PFM auto switching operations and it can be selected by external signal.
A current limiter circuit is built-in to the IC (except with the 500 kHz version) and monitors the ripple voltage on the FB pin.
Operation is shut down when the ripple voltage is more than 250mV. The operations of the IC can be returned to normal with
a toggle of the CE pin or by turning the power supply back on.
■GENERAL
DESCRIPTION
■APPLICATIONS
●PDAs
●Cellular
phones
●Palmtop
computers
●Portable
audio systems
●Various
multi-function power supplies
■FEATURES
Input Voltage Range
: 0.9V ~ 10V
Supply Voltage Range
: 1.8V ~ 10V
Output Voltage Range
: 1.5V ~ 30V
Set freely with the reference voltage
0.9V(±2.0%) and two resistors
Oscillation Frequency
: 100, 180, 300, 500kHz (±15%)
180, 300kHz only for XC9103/04/05B
type (with current limiter)
Output Current
: more than 400mA
(V
IN
=1.8V, V
OUT
=3.3V)
Controls
: PWM (XC9103)
PWM/PFM auto-switching (XC9104)
PWM/PFM manual switching
(XC9105)
High Efficiency
: 85% (TYP.)
Stand-by Current
: I
STB
=1.0μA (MAX.)
Load Capacitors
: Low ESR capacitors compatible
Current
: Operates when
Limiter Function
ripple voltage=250mV
Also available without current limiter
(100kHz and 500kHz types are
available only without current limiter)
Package
: SOT-25, USP-6B
■TYPICAL
APPLICATION CIRCUIT
■
TYPICAL PERFORMANCE
CHARACTERISTICS
1/23
XC9103/XC9104/XC9105
Series
■PIN
CONFIGURATION
EXT
GND
FB 6
1 EXT
2 VDD
3 GND
NC 5
CE 4
FB
VDD
CE
The dissipation pad for the USP-6B
package should be solder-plated in
recommended mount pattern and metal
masking so as to enhance mounting
strength and heat release.
If the pad needs to be connected to other
pins, it should be connected to the V
DD
(No.2) pin.
(TOP VIEW)
■PIN
ASSIGNMENT
PIN NUMBER
SOT-25
1
2
3
4
5
-
USP-6B
6
2
4
3
1
5
PIN NAME
FB
V
DD
CE
CE (/PWM)
GND
EXT
NC
FUNCTION
Output Resistor Connection
Supply Voltage
Chip Enable
Serves as both PWM/PFM switching pin and CE pin for XC9105
Ground
External Transistor Connection
No Connection
■
PRODUCT CLASSIFICATION
●Ordering
Information
XC9103①②③④⑤⑥: PWM Control
XC9104①②③④⑤⑥: PWM/PFM Automatic Switching Control
XC9105①②③④⑤⑥: PWM/PFM Manual Switching Control
DESIGNATOR
①
② ③
DESCRIPTION
Type of DC/DC Controller
Output Voltage
SYMBOL
B
D
09
3
④
Oscillation Frequency
1
2
5
⑤
⑥
Package
Device Orientation
M
D
R
L
DESCRIPTION
: With current limiter (180kHz, 300kHz only)
: Without current limiter
: FB voltage (e.g. FB Voltage=0.9V→②=0,
③=9)
: 300kHz
: 100kHz
: 180kHz
: 500kHz
: SOT-25 (SOT-23-5)
: USP-6B
: Embossed tape, standard feed
: Embossed tape, reverse feed
2/23
XC9103/XC9104/XC9105
Series
■
BLOCK DIAGRAM
■
ABSOLUTE MAXIMUM RATINGS
Ta=25℃
PARAMETER
V
DD
pin Voltage
FB pin Voltage
CE pin Voltage
EXT pin Voltage
EXT pin Current
Power Dissipation
SOT-25
USP-6B
SYMBOL
V
DD
FB
V
CE
V
EXT
I
EXT/
Pd
Topr
Tstg
RATINGS
-0.3 ~ 12.0
-0.3 ~ 12.0
-0.3 ~ 12.0
-0.3 ~ V
DD
+ 0.3
±100
150
100
-40 ~ +85
-40 ~ +125
UNITS
V
V
V
V
mA
mW
℃
℃
Operating Temperature Range
Storage Temperature Range
3/23
XC9103/XC9104/XC9105
Series
■ELECTRICAL
CHARACTERISTICS
XC9103B092MR, XC9104B092MR, XC9105B092MR
XC9103D092MR, XC9104D092MR, XC9105D092MR
PARAMETER
Output Voltage
Output Voltage Range
FB Control Voltage
Supply Voltage Range
(*1)
SYMBOL
V
OUT
V
OUTSET
V
FB
V
DD
V
ST1
V
ST2
V
HLD
I
DD1
I
DD2
I
STB
FOSC
MAXDTY
PFMDTY
V
LMT
EFFI
T
SS
V
CEH
V
CEL
V
PWMH
V
PWML
R
EXTH
R
EXTL
I
CEH
I
CEL
I
FBH
I
FBL
CONDITIONS
V
IN=
V
OUTSET
x0.6, V
DD
=3.3V
I
OUT
=10mA, Using 2SD1628
MIN.
3.234
1.5
0.882
1.8
(FOSC=180kHz)
TYP.
MAX.
3.300
-
0.900
-
-
-
-
45
17
-
180
81
28
250
85
10.0
-
-
-
-
24
16
-
-
-
-
3.366
30.0
0.918
10.0
0.9
0.8
0.7
64
24
1.0
207
87
36
330
-
20.0
-
0.20
V
DD
-1.0
36
24
0.1
- 0.1
0.1
- 0.1
Ta=25℃
UNITS
CIRCUIT
V
V
V
V
V
V
V
μA
μA
μA
kHz
%
%
mV
%
ms
V
V
V
V
Ω
①
②
④
Operation Start Voltage
Oscillation Start Voltage
(*1)
Operation Hold Voltage
Supply Current 1
Supply Current 2
Stand-by Current
Oscillation Frequency
Maximum Duty Cycle
PFM Duty Rate
Overcurrent
Sense Voltage
(*3)
Efficiency
Soft-Start Time
CE “High” Voltage
(*2)
CE “Low” Voltage
(*2)
PWM “High” Voltage
(*2)
PWM “Low” Voltage
(*2)
EXT “High”
On Resistance
EXT “Low”
On Resistance
CE “High Current
CE “Low” Current
FB “High” Current
FB “Low” Current
Recommended circuit using 2SD1628,
I
OUT
=1.0mA
No external components, CE connected
to V
DD
, Voltage applied, FB=0V
Recommended circuit using 2SD1628,
I
OUT
=1.0mA
Same as V
ST2
, V
DD
=3.3V
Same as I
DD1
, FB=1.2V
Same as I
DD1
, CE=0V
Same as I
DD1
Same as I
DD1
No load
(XC9104B/D, 9105B/D)
Step input to FB (Pulse width: 2.0μS
or more), EXT=Low level voltage
(XC9103B, 9104B, 9105B)
Recommended circuit using XP161A1355
Same as I
DD1
Same as I
DD1
I
OUT
=1.0mA
(XC9105B/D)
I
OUT
=1.0mA
(XC9105B/D)
Same as I
DD1
, V
EXT
=V
OUT
-0.4V
Same as I
DD1
, V
EXT
=0.4V
Same as I
DD2
, CE=V
DD
Same as I
DD2
, CE=0V
Same as I
DD2
, CE=V
DD
Same as I
DD2
, CE=0V
-
-
-
-
-
-
153
75
20
170
-
5.0
0.65
-
V
DD
-0.2
-
-
-
-
-
-
-
③
④
③
④
④
⑤
④
④
①
⑥
①
①
⑤
⑤
①
①
④
④
⑤
⑤
⑤
⑤
Ω
μA
μA
μA
μA
Test Conditions: Unless otherwise stated, CL: ceramic, recommended MOSFET should be connected.
V
OUT
=3.3V, V
IN
=2.0V, I
OUT
=170mA
NOTE:
*1 Although the IC starts step-up operations from a V
DD
of 0.8V, the output voltage and oscillation frequency are stabilized at V
DD
>1.8V.
Therefore, a V
DD
of more than 1.8V is recommended when V
DD
is supplied from V
IN
or other power sources.
*2 With the XC9105 series, the CE pin also serves as a PWM/PFM switching pin. In operation, PWM control is selected when the voltage
at the CE pin is more than V
DD
-0.2V. On the other hand, PWM/PFM automatic switching control at a duty = 25% is selected when
the voltage at the CE pin is less than V
DD
-1.0V and more than V
CEH
.
*3 The overcurrent limit circuit of this IC is designed to monitor the ripple voltage so please select your external components carefully to
prevent V
LMT
being reached under low temperature conditions as well as normal operating conditions. Following current limiter
circuit operations, which in turn causes the IC's operations to stop, the operations of the IC can be returned to normal with a toggle of
the CE pin or by turning the power supply back on.
4/23
XC9103/XC9104/XC9105
Series
■ELECTRICAL
CHARACTERISTICS (Continued)
XC9103B093MR, XC9104B093MR, XC9105B093MR
XC9103D093MR, XC9104D093MR, XC9105D093MR
PARAMETER
Output Voltage
Output Voltage Range
FB Control Voltage
Supply Voltage Range
(*1)
SYMBOL
V
OUT
V
OUTSET
V
FB
V
DD
V
ST1
V
ST2
V
HLD
I
DD1
I
DD2
I
STB
FOSC
MAXDTY
PFMDTY
V
LMT
EFFI
T
SS
V
CEH
V
CEL
V
PWMH
V
PWML
R
EXTH
R
EXTL
I
CEH
I
CEL
I
FBH
I
FBL
CONDITIONS
V
IN=
V
OUTSET
x0.6, V
DD
=3.3V
I
OUT
=10mA, Using 2SD1628
(FOSC=300 kHz)
MIN.
TYP.
MAX.
3.234
1.5
0.882
1.8
3.300
-
0.900
-
-
-
-
62
16
-
300
81
32
300
85
10.0
-
-
-
-
24
16
-
-
-
-
3.366
30.0
0.918
10.0
0.9
0.8
0.7
88
22
1.0
345
87
40
380
-
20.0
-
0.20
-
V
DD
-1.0
36
24
0.1
- 0.1
0.1
- 0.1
Ta=25℃
UNITS
CIRCUIT
V
V
V
V
V
V
V
μA
μA
μA
kHz
%
%
mV
%
ms
V
V
V
V
Ω
①
②
④
Operation Start Voltage
Oscillation Start Voltage
(*1)
Operation Hold Voltage
Supply Current 1
Supply Current 2
Stand-by Current
Oscillation Frequency
Maximum Duty Cycle
PFM Duty Rate
Overcurrent
Sense Voltage
(*3)
Efficiency
Soft-Start Time
CE “High” Voltage
(*2)
CE “Low” Voltage
(*2)
PWM “High” Voltage
(*2)
PWM “Low” Voltage
(*2)
EXT “High”
On Resistance
EXT “Low”
On Resistance
CE “High Current
CE “Low” Current
FB “High” Current
FB “Low” Current
Recommended circuit using 2SD1628,
I
OUT
=1.0mA
No external components, CE connected
to V
DD
, Voltage applied, FB=0V
Recommended circuit using 2SD1628,
I
OUT
=1.0mA
Same as V
ST2
, V
DD
=3.3V
Same as I
DD1
, FB=1.2V
Same as I
DD1
, CE=0V
Same as I
DD1
Same as I
DD1
No load
(XC9104B/D, 9105B/D)
Step input to FB (Pulse width: 2.0μS
or more), EXT=Low level voltage
(XC9103B, 9104B, 9105B)
Recommended circuit using XP161A1355
Same as I
DD1
Same as I
DD1
I
OUT
=1.0mA
(XC9105B/D)
I
OUT
=1.0mA
(XC9105B/D)
Same as I
DD1
, V
EXT
=V
OUT
-0.4V
Same as I
DD1
, V
EXT
=0.4V
Same as I
DD2
, CE=V
DD
Same as I
DD2
, CE=0V
Same as I
DD2
, CE=V
DD
Same as I
DD2
, CE=0V
-
-
-
-
-
-
255
75
24
220
-
5.0
0.65
-
V
DD
-0.2
-
-
-
-
-
-
-
③
④
③
④
④
⑤
④
④
①
⑥
①
①
⑤
⑤
①
①
④
④
⑤
⑤
⑤
⑤
Ω
μA
μA
μA
μA
Test Conditions: Unless otherwise stated, CL: ceramic, recommended MOSFET should be connected.
NOTE:
*1 Although the IC starts step-up operations from a V
DD
of 0.8V, the output voltage and oscillation frequency are stabilized at V
DD
>1.8V.
Therefore, a V
DD
of more than 1.8V is recommended when V
DD
is supplied from V
IN
or other power sources.
*2 With the XC9105 series, the CE pin also serves as a PWM/PFM switching pin. In operation, PWM control is selected when the voltage
at the CE pin is more than V
DD
-0.2V. On the other hand, PWM/PFM automatic switching control at a duty = 25% is selected when
the voltage at the CE pin is less than V
DD
-1.0V and more than V
CEH
.
*3 The overcurrent limit circuit of this IC is designed to monitor the ripple voltage so please select your external components carefully to
prevent V
LMT
being reached under low temperature conditions as well as normal operating conditions. Following current limiter
circuit operations, which in turn causes the IC's operations to stop, the operations of the IC can be returned to normal with a toggle of
the CE pin or by turning the power supply back on.
5/23
Industrial Control Electronics
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