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Torex Semiconductor

XC9107 Datasheet Preview

XC9107 Datasheet

Step-Up DC/DC Converters

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XC9106/XC9107 Series
ETR0405_004
PWM Control, PWM/PFM Switching Control,
Step-Up DC/DC Converters, Externally Applied Vref
GENERAL DESCRIPTION
GreenOperation-Compatible
The XC9106 / XC9107 series are step-up DC/DC controller ICs with an externally applied reference voltage (Vref).
Output voltage will be set with external resistors (RFB1 and 2) and Vref value. The series make it easy to control output
voltage externally and are suited to software applications that need to vary voltage, such as LCD power supply for PDA.
Output will be stable no matter which load capacitors are used but if a low ESR capacitor is used, RSENSE of about 0.1Ω will
be required and phase compensation will be achieved. This makes the use of ceramic capacitors much easier, and allows for
lower output ripple and reduced PCB area requirements. Tantalum and electrolytic capacitors can also be used, in which
case, RSENSE becomes unnecessary.
Oscillation frequencies of high clock, low ripple 300kHz and low supply current 100kHz are available.
The XC9107 series are PWM/PFM automatic switching controlled. Control switches from PWM to PFM during light loads with
the XC9107 and the series is highly efficient from light loads to large output currents. By bringing the whole circuit down
while the series is in the stand-by mode (CE/PWM pin: low), supply current can be reduced to less than 1.0μA.
APPLICATIONS
Power supply for LCDs
PDAs
Cellular phones
Palmtop computers
Portable audio systems
Various multi-function power supplies
FEATURES
Input Voltage
: 0.9V ~ 10V
Power
Supply Voltage Range : 1.8V~10.0V and more than
Vref+0.7V
VREF Input Range
: 0.8V~2.5V (±2.0%)
Output Voltage
: Vref x external split resistor ratio
VOUT=Vref x (RFB1+RFB2)/RFB2
Oscillation Frequency : 300kHz, 100kHz (±15%)
Output Current
: More than 30mA
(VIN=3.3V, VOUT=20V,
when external components are
used as in the circuits below.)
Controls
: PWM (XC9106)
: PWM/PFM auto-switching
(XC9107)
High Efficiency
: 85% (TYP.)
Stand-by Current
: ISTB = 1.0μA (MAX.)
Load Capacitors
: Low ESR capacitors compatible
Externally Applied Reference Voltage (Vref)
Packages
: SOT-25, USP-6B
Environmentally Friendly : EU RoHS Compliant, Pb Free
TYPICAL APPLICATION CIRCUIT
RSENSE : 100m Ω
for Ceramic CL SD : MA737
*
CFB : 27pF
VOUT = 8V~25V RFB1 : RFB2 :
IOUT = 30mA 270k Ω 30k Ω
Ceramic CL :
10μF
0.8V~2.5V
D/A converter
1
2
3
CE/Vref
5
4
L : 10μH
Nch Pow er
MOS FET
2SK2159
CIN
VIN = 3.3V
* RSENSE is of no use in light load (uncontinuous mode)
applications such as a small LCD, even using ceramic
capacitor.
TYPICAL PERFORMANCE
CHARACTERISTICS
XC9107D003M R
Circuit as left
30 VDD=VIN=3.3V, IOUT=30mA
25
20
15
10
5
0
0.0 0.5 1.0 1.5 2.0 2.5 3.0
Vref (V)
XC9107D003M R
30
Circuit as left
VDD=VIN=3.3V
25
2.5V
20
2.0V
15 1.5V
10
5 Vref=0.8V
0
0.1
1 10 100
IOUT (mA)
1000
1/11




Torex Semiconductor

XC9107 Datasheet Preview

XC9107 Datasheet

Step-Up DC/DC Converters

No Preview Available !

XC9106/XC9107 Series
PIN CONFIGURATION
NC GND
5 4 FB 6
NC 5
CE/VIEW
1 EXT
2 VDD
3
*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 VDD pin.
1 23
FB VDD CE/Vref
SOT-25
(TOP VIEW)
PIN ASSIGNMENT
PIN NUMBER PIN
SOT-25 USP-6B NAME
FUNCTION
1 6 FB Output Resistor Connection
2 2 VDD
Supply Voltage
CE/ Serves as Both Chip Enable Pin
34
Vref and Reference Voltage Apply Pin.
4 3 GND
Ground
5 1 EXT External Transistor Connection
- 5 NC
No Connection
PRODUCT CLASSIFICATION
Ordering Information
XC9106D①②③④⑤-⑥(*1) : PWM control
XC9107D①②③④⑤-⑥(*1) : PWM/PFM automatic switching control
DESIGNATOR
ITEM
SYMBOL
DESCRIPTION
①②
Reference Voltage
(Apply External)
00 Fixed
④⑤-⑥
Oscillation Frequency
Packages
(Oder Unit)
3
1
MR
MR-G
DR
DR-G
300kHz
100kHz
SOT-25 (3,000/Reel)
SOT-25 (3,000/Reel)
USP-6B (3,000/Reel)
USP-6B (3,000/Reel)
(*1) The “-G” suffix indicates that the products are Halogen and Antimony free as well as being fully RoHS compliant.
2/11


Part Number XC9107
Description Step-Up DC/DC Converters
Maker Torex Semiconductor
Total Page 11 Pages
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