XC9110/XC9111
Series
PFM Controlled Step-Up DC/DC Converter / Controller ICs
ETR0406-008
■GENERAL
DESCRIPTION
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.
■APPLICATIONS
●Smart
phones / Mobile phones
●Note
PCs / Tablet PCs
●Digital
still cameras / Camcorders
●Mobile
devices / terminals
■
FEATURES
Input Voltage Range
: operating hold voltage 0.7V~10.0V
Start-up voltage
0.9V~10.0V
Output Voltage Range
: 1.5V~7.0V in 0.1V increments
Output Accuracy
: ±2.5%
Max Oscillation Frequency
: 100 kHz ±15%
180 kHz (at 56% duty of XC9111)
Built-in Switch Types
: A/C/E type
N-ch FET 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
Max Duty Cycles
: 75% (for XC9110)
: 56%/75% two steps (for XC9111)
Low Supply Current
: 2.0μ @ V
OUT
=3V
A
Operating Ambient Temperature:
-40℃ ~ +85℃
Packages
: SOT-23, SOT-89 (for XC9111),
SOT-25, USP-6C
■TYPICAL
APPLICATION CIRCUIT
●C
type circuit
■
TYPICAL PERFORMANCE
CHARACTERISTICS
XC9111E331MR
L=100μH(CR54), CL47μF(Tantalum)
SD: XBS104S14R-G
100
L
5
4
(TOP VIEW)
SOT-25
VIN +
CIN
Efficiency:EFFI(%)
80
1
2
3
VOUT
3.0V
60
1.5V
40
1.2V
VIN=0.9V
20
2.4V
+
SD
CL
(Tantalum)
GND
CE
0
0
50
1 00
150
2 00
Output Current:IOUT(mA)
250
3 00
1/35
XC9110/XC9111
Series
■BLOCK
DIAGRAMS
●XC9111
A and B series
½
L
Buffer
VSS
VLx limiter
Only A type
VDD
Vref
ＯＵＴ
V
PFM Control OSC
100kHz (180kHz)
+
DUTY Selector
EXT
-
PFM Comparator
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
Lx
Buffer
VLx limiter
Only C type
VDD
Vref
VOUT
VSS
PFM Control OSC
100kHz (180kHz)
DUTY Selector
Only XC9111
+
-
PFM Comparator
EXT
CE
Chip Enable
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.
2/35
XC9110/XC9111
Series
■BLOCK
DIAGRAMS
●XC9111
E and F series
VDD
Lx
Buffer
VLx limiter
Only E type
VDD
Vref
VOUT
PFM Control OSC
100kHz(180kHz)
VSS
DUTY Selector
Only XC9111
+
-
PFM Comparater
EXT
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.
3/35
XC9110/XC9111
Series
■PRODUCT
CLASSIFICATION
●Ordering
Information
XC9110①②③④⑤⑥-⑦ : PFM control, 75% duty
XC9111①②③④⑤⑥-⑦ : PFM control, 56% / 75% duty variable
DESIGNATOR
ITEM
SYMBOL
A
B
C
D
E
F
15 ~ 70
1
MR
MR-G
PR
PR-G
ER
ER-G
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
①=A
~ B SOT-23 (3,000pcs/Reel)
①=C
~ F SOT-25 (3,000pcs/Reel)
①=A
~ B SOT-23 (3,000pcs/Reel)
①=C
~ F SOT-25 (3,000pcs/Reel)
①=A
~ B SOT-89 (1,000pcs/Reel)
①=A
~ B SOT-89 (1,000pcs/Reel)
①=C
~ F USP-6C (3,000pcs/Reel)
①=C
~ F USP-6C (3,000pcs/Reel)
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
⑤⑥-⑦
(*1)
Packages
(Order Unit)
(*1)
The “-G” suffix denotes Halogen and Antimony free as well as being fully EU RoHS compliant.
●Selection
Guide
4/35
XC9110/XC9111
Series
■PIN
CONFIGURATION
VOUT
Lx/EXT
VSS
3
5
4
VSS
NC
6
5
4
1
VOUT/VDD
2
3
NC
CE/VOUT
1
VSS
2
Lx/EXT
1
2
3
CE/VOUT VOUT/VDD NC
1
VSS
2
VOUT
3
Lx/EXT
Lx/EXT
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
5/35
51单片机
