XC9110/XC9111
Series
PFM Controlled Step-Up DC/DC Converter / Controller ICs
ETR0406 004
The XC9110/9111 series is a group of PFM controlled step-up DC/DC converter/controller ICs designed to generate low supply
voltage by the combination of PFM control and CMOS structure. The series is ideal for applications where a longer battery life is
needed such as in portable communication equipment. With a built-in 2.5ΩN-channel driver transistor, the XC9110A/C/E and
XC9111A/C/E types provide a step-up operation by using only a coil, a capacitor, and a diode connected externally.
The XC9110/9111B, D and F versions can be used with an external transistor for applications requiring larger currents.
Output voltage is internally programmable in a range from 1.5V to 7.0V in increments of 0.1V (accuracy:±2.5%).
Maximum oscillation frequency is set to 100kHz for XC9110/9111 series. (At light loads, it is set to 180kHz for the XC9111
series.) Options include products equipped with a CE pin (C and D versions) that allows the IC to be shut down thereby
reducing supply current and with separated V
DD
/V
OUT
pins (E and F versions) to separate the power supply block and the
output voltage detect block. With the XC9110 series, maximum duty cycle is set to 75% (V
DD
=3.3V) making it suitable for
use with large current operations. The XC9111 series automatically switches duty ratio between 56% & 75% (V
DD
=3.3V)
when it senses changes in load to drop output ripple voltage and can support both large and small currents. The external
transistor types (B/D/F types) can be provided for applications, which require larger currents.
■GENERAL
DESCRIPTION
■APPLICATIONS
●Mobile
phones
●Various
palm top equipment
●Cameras,
VCRs
●Various
portable equipment
■FEATURES
Operating (Input) Voltage Range
: 0.9V ~ 10.0V
Output Voltage Range
: 1.5V~7.0V
(0.1V increments,
accuracy
±2.5%)
Maximum Oscillation Frequency
: 100kHz (accuracy
±15%)
180kHz (for the XC9111 series,
duty ratio: 56% at light loads)
Built-in Switching N-ch Transistor
: A/C/E type
ON Resistance 2.5Ω
(V
DD
=3.0V)
External Transistor Types
: B/D/F type
Lx Limit Voltage
: E type: more than V
DD
=2.0V
: A/C type: more than V
OUT
=2.0V
Low Supply Current
: 2.0μA
(When operating, VOUT=3V)
Small Package
: SOT-23 & SOT89
(for XC9111 series),
SOT-25, USP-6C
■TYPICAL
APPLICATION CIRCUIT
●C
type circuit
■
TYPICAL PERFORMANCE
CHARACTERISTICS
100
XC9111E331MR
L=100μH(CR54), CL47μF(Tantalum)
SD: XB01SB04A2BR
L
5
4
80
Efficiency:EFFI(%)
(TOP VIEW)
SOT-25
VIN +
CIN
1
2
3
VOUT
SD
+
CL
(Tantalum)
3.0V
60
1.5V
40
1.2V
VIN=0.9V
20
2.4V
GND
CE
0
0
50
1 00
150
2 00
Output Current:IOUT(mA)
250
3 00
1/35
XC9110/XC9111
Series
■PIN
CONFIGURATION
Lx/EXT
V SS
5
4
1
2
3
CE/V OUT V OUT/V DD NC
SOT-23 (TOP VIEW)
SOT-25 (TOP VIEW)
SOT-89 (TOP VIEW)
USP-6C (BOTTOM VIEW)
*The dissipation pad for the USP-6C 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 pin No.1.
■PIN
ASSIGNMENT
●
XC9111A/B
PIN NUMBER
SOT-23
SOT-89
A
B
A
B
1
1
1
1
3
3
2
2
2
-
3
-
-
2
-
3
PIN NAME
V
SS
V
OUT
LX
EXT
FUNCTIONS
: Ground
: Output Voltage Montior, Internal Power Supply
: Switch
: External Switching transistor drive <N-ch transistor drive)
●XC9110//9111C/D/E/F
PIN NUMBER
SOT-25
C
-
4
-
5
1
2
3
D
-
4
5
-
1
2
3
E
2
4
-
5
-
1
3
F
2
4
5
-
-
1
3
C
-
6
-
4
3
USP-6C
D
-
6
4
-
3
E
1
6
-
4
-
F
1
6
4
-
-
PIN NAME
V
DD
V
SS
EXT
Lx
CE
V
OUT
NC
FUNCTIONS
Internal Power Supply
Ground
External switching transistor drive
<Connect to the gate pin of N-ch Power MOSFET>
Switch
Chip Enable <Connect to the V
OUT
pin when Active and the
V
SS
pin when stand-by>
Output voltage monitor
No connection
1
1
3
3
2,5 2,5 2,5 2,5
2/35
XC9110/XC9111
Series
■PRODUCT
CLASSIFICATION
●Selection
Guide
●Ordering
Information
XC9110①②③④⑤⑥ : PFM control, 75% duty
XC9111①②③④⑤⑥ : PFM control, 56% / 75% duty variable
DESIGNATOR
DESCRIPTION
SYMBOL
A
B
C
D
E
F
15 ~ 70
1
M
⑤
Package
P
E
R
L
DESCRIPTION
: V
DD
/ V
OUT
common type (for XC9111series)
: V
DD
/ V
OUT
common type (for XC9111series)
: CE pin (5 pin)
: CE pin (5 pin)
: V
DD
/ V
OUT
separated type (5 pin)
: V
DD
/ V
OUT
separated type (5 pin)
: ex. 3.5V output
→ ②=
3,
③=
5
: 100kHz
: SOT-23 (for A and B types) Semi-Custom
: SOT-25 (for C, D, F types)
: SOT-89 (for A and B types) Semi-Custom
: USP-6C (for C, D, F types)
: Embossed tape, standard feed
: Embossed tape, reverse feed
Built-in Transistor
External Transistor
Built-in Transistor
External Transistor
Built-in Transistor
External Transistor
①
CE Function
②③
④
Output Voltage
Maximum Oscillation
Frequency
⑥
Device Orientation
3/35
XC9110/XC9111
Series
■BLOCK
DIAGRAMS
●XC9111
A and B series
Note: The XC9110 series, Tr. Built-in type, uses the Lx pin and the XC9111 series, external Tr. Type, uses the EXT pin.
The duty ratio of the XC9111 series automatically varies between 56% (oscillation frequency 180kHz) and 75%
(oscillation frequency (f
OSC
) 100kHz). The V
Lx
limit function only applies to the XC9110/9111 A types.
* The duty ratio depends on power supply. Please refer to the electrical characteristics on duty against output voltage
you use.
●XC9110
/ 9111 C and D series
Note: The XC9110 series, Tr. Built-in type, uses the Lx pin and the XC9111 series, external Tr. Type, uses the EXT pin.
The XC9110 series' duty ratio is 75% and oscillation frequency (f
OSC
) is 100kHz. The duty ratio of the XC9111 series
automatically varies between 56% (oscillation frequency 180kHz) and 75% (oscillation frequency (f
OSC
) 100kHz). The
V
Lx
limit function only applies to the XC9110/9111 C versions.
* The duty ratio depends on power supply. Please refer to the electrical characteristics on duty against output voltage
you use.
4/35
XC9110/XC9111
Series
■BLOCK
DIAGRAMS
●XC9111
E and F series
Note: The XC9110 series, Tr. Built-in type, uses the Lx pin and the XC9111 series, external Tr. Type, uses the EXT pin.
The XC9110 / 9111 series E and F series have the V
DD
pin. The XC9110 series' duty ratio is 75% and
oscillation frequency (f
OSC
) is 100kHz. The duty ratio of the XC9111 series automatically varies between
56% (oscillation frequency 180kHz) and 75% (oscillation frequency (f
OSC
) 100kHz).
The V
Lx
limit function only applies to the XC9110/9111 C versions.
* The duty ratio depends on power supply.
Please refer to the electrical characteristics on duty against output voltage you use.
■
ABSOLUTE MAXIMUM RATINGS
Ta = 25℃
PARAMETER
V
OUT
Input Voltage
Lx Pin Voltage
Lx Pin Current
EXT Pin Voltage
EXT Pin Current
CE Input Voltage
V
DD
Input Voltage
SOT-23, 25
Power Dissipation
SOT-89
USP-6C
Operating Temperature Range
Storage Temperature Range
Topr
Pd
SYMBOL
V
OUT
V
Lx
I
Lx
V
EXT
I
EXT
V
CE
V
DD
RATINGS
– 0.3 ~ 12.0
– 0.3 ~ 12.0
400
V
SS
– 0.3 ~ V
OUT
＋0.3
±100
– 0.3 ~ 12.0
– 0.3 ~ 12.0
250
500
100
– 40 ~ + 85
℃
Tstg
– 55 ~ +125
℃
* Define as V
SS
with a standard of all the voltage.
mW
UNITS
V
V
mA
V
mA
V
V
5/35
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