Series
PWM Controlled Step-Up DC/DC Controllers
NInput
Voltage Range : 2.5V ~ 20V
NOutput
Voltage Range
: 2.5V ~ 16V
(Fixed Voltage Type)
: 30V + (Adjustable Type)
NOscillation
Frequency Range
: 100kHz ~ 600kHz
NOutput
Current
: up to 1.5A
NCeramic
Capacitor Compatible
NMSOP-8A
Package
■Applications
GMobile,
Cordless phones
GPalm
top computers, PDAs
GPortable
games
GCameras,
Digital cameras
GLaptops
4
■Features
GStable
Operations via Current & Voltage Multiple Feedback
GUnlimited
Options for Peripheral Selection
GCurrent
Protection Circuit
GCeramic
Capacitor Compatible
■General Description
The XC9101 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 1.5A.
With output voltage fixed internally, V
OUT
is selectable in 0.1V steps
within a 2.5V - 16.0V range (± 2.5%).
For output voltages outside this range, we recommend the FB version
which has a 0.9V internal reference voltage. Using this version, the
required output voltage can be set-up using 2 external resistors.
Switching frequencies can also be set-up externally within a range of
100~600 kHz and therefore frequencies suited to your particular
application can be selected.
With the current sense function, peak currents (which flow through
the driver transistor and the coil) can be controlled. Soft-start time can
be adjusted using external resistor and capacitor.
During shutdown (CE pin =L), consumption current can be reduced to
as little as 0.5µA (TYP.) or less.
■Typical Application Circuit
22μH
XP161A1355PR
1 EXT
2 Isen
50mΩ
150kΩ
3 V
IN
220μF 0.1
μF
+10μF
Vss 8
V
OUT
7
GAIN 6
94μF
22KΩ
470pF
180pF
U3FWJ44N
■Typical Performance
Characteristic
V
OUT
:5.0V FOSC:180kHz
100
Efficiency : EFFI (%)
80
4.2V
3.3V
4 CE/SS CLK 5
1μF
60
V
IN
=2.5V
40
1
10
100
1000
Output Current : I
OUT
(mA)
387