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XC9110 Datasheet Preview

XC9110 Datasheet

PFM Controlled Step-Up DC/DC Converter/Controller

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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 VDD/VOUT 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% (VDD=3.3V) making it suitable for use with large
current operations. The XC9111 series automatically switches duty ratio between 56% & 75% (VDD=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@ VDD=3.0V
External Transistor Types : B/D/F type
Lx Limit Voltage
Max Duty Cycles
: E type: more than VDD=2.0V
: A/C type: more than VOUT=2.0V
: 75% (for XC9110)
: 56%/75% two steps (for XC9111)
Low Supply Current
: 2.0μA @ VOUT=3V
Operating Ambient Temperature: -40~ +85
Packages
: SOT-23, SOT-89 (for XC9111),
SOT-25, USP-6C
TYPICAL APPLICATION CIRCUIT
C type circuit
L
VIN + CIN
5
4
(TOP VIEW)
SOT-25
1
2
3
+
SD
CL
(Tantalum)
GND
CE
VOUT
TYPICAL PERFORMANCE
CHARACTERISTICS
XC9111E331MR
L=100μH(CR54), CL47μF(Tantalum)
SD: XBS104S14R-G
100
80
60
1.5V
40
1.2V
VIN=0.9V
20
3.0V
2.4V
0
0
50
1 00
150 2 00
250 3 00
Output Current:IOUT(mA)
1/35




Torex Semiconductor

XC9110 Datasheet Preview

XC9110 Datasheet

PFM Controlled Step-Up DC/DC Converter/Controller

No Preview Available !

XC9110/XC9111 Series
BLOCK DIAGRAMS
XC9111 A and B series
L
VSS
EXT
Buffer
VLx limiter
Only A type
VDD
Vref
PFM Control OSC
100kHz (180kHz)
+
DUTY Selector
-
PFM Comparator
VOUT
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 (fOSC) 100kHz). The VLx 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
VLx limiter
Only C type
Buffer
VDD
Vref
VSS
PFM Control OSC
100kHz (180kHz)
DUTY Selector
Only XC9111
+
-
EXT
PFM Comparator
CE
Chip Enable
VOUT
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 (fOSC) is 100kHz. The duty ratio of the XC9111 series
automatically varies between 56% (oscillation frequency 180kHz) and 75% (oscillation frequency (fOSC) 100kHz). The
VLx 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


Part Number XC9110
Description PFM Controlled Step-Up DC/DC Converter/Controller
Maker Torex Semiconductor
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XC9110 Datasheet PDF






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