
Applications
z
Mobile, Cordless phones
z
Palm top computers, PDAst
z
Portable games
z
Cameras, Digital cameras
z
Laptops
Input Voltage Range : 2.0V ~20V
Output Voltage Range : 2.2V ~ 16V
Oscillation Frequency Range : 100kHz ~ 600kHz
Output Current : up to 3A
Ceramic capacitor compatible
MSOP-8A Package
General Description
Features
The XC9101/9102 series are step-up multiple current and
voltage feedback DC/DC controller ICs. Current sense, clock
frequencies and amp feedback gain can all be externally regulated.
A stable power supply is possible with output currents of up to 3A and
output voltage is selectable in 0.1V steps within a 2.2V - 16.0V
(±2.5% accuracy) range (internal). Further, a type which has a 0.9V
internal reference voltage and which allows output voltage to be set-up
freely via the external components is also available (FB type).
Switching frequencies can be regulated externally within a range of
100 ~600 kHz and therefore frequencies suited to your particular
application are selectable.
The XC9102 series switches from PWM to current limited PFM control
during light loads and the series offers low ripple and high efficiencies
from light loads through to large output currents. Further, the drive
transistor's current limit can be applied via the current sense function
and soft-start times can be regulated by the external resistors and
capacitors.
During shutdown (CE pin =L), consumption current can be reduced to
as little as 0.5
μ
A or less.
Stable Operations via Current & Voltage Multiple Feedback
Unlimited Options for Peripheral Selection
PWM/PFM Switching Control (XC9102)
Current Protection Circuit
Low Ripple Output Voltage during Light Loads (XC9102)
Ceramic Capacitor Compatible
Pin Configuration
Pin Assignment
1
PWM Controlled, PWM//PFM Switchable Step-Up DC/DC Converters
PIN NUMBER
PIN NAME
5
6
7
8
CLK
V
SS
XC9101/02 Series
Sep. 06, 01 Ver. III
3
4
V
IN
PIN NUMBER
PIN NAME
1
2
EXT
Isen
CC / GAIN
V
OUT
/ FB
CE / SS
FUNCTION
Driver
Current Sense
Power Input
CE/Soft Start
FUNCTION
Clock Input
Phase Compensation
Voltage Sense
Ground
EXT
Isen
V
IN
CE/SS
V
SS
V
OUT
CC/GAIN
CLK
4
8
7
2
3
1
5
6
0.65
3.0 TYP
4.9 TYP
3.0 TYP
Height:1.02
TYP
(Units:mm)