◆Operating
Voltage Range : 2.5V ~ 6.0V
◆Output
Voltage Externally Set-Up
: Vref =1.0V ± 2.0%
(Can be set freely up to 19.5V)
◆Oscillation
Frequency
: 1.0MHz (Accuracy ± 20%)
◆High
Efficiency : 86%
(V
DD
=3.6V, V
OUT
=15V, I
OUT
=10mA)
◆Ultra
Small Packages
: SOT-25, USP-6C
■APPLICATIONS
●Organic
electroluminescene display (OELD)
●Power
supplies for LCD panels
●Various
general-purpose power supplies
■GENERAL
DESCRIPTION
The XC9119D01A series is 1MHz, PWM controlled step-up
DC/DC converter, designed to allow the use of ceramic
capacitors. With a built-in 2.0Ω switching transistor, the
XC9119D01A series can easily provide a step-up operation
by using only a coil, a diode, a capacitor, and a resistor,
connected externally.
Since output voltage up to 19.5V (Maximum Lx operating
voltage: 20V) can be derived with reference voltage supply of
1.0V (±2.0%) and external components, the series can easily
supply high voltage for various general-purpose power
supplies, LCD panels and organic EL displays.
With a high switching frequency of 1.0MHz, a low profile and
small board area solution can be achieved using a chip coil
and an ultra small ceramic output capacitor.
With the current limit function (400mA (TYP.): V
DD
=3.6V), a
peak current, which flows through built-in driver transistors
can be limited. Soft-start time can be adjusted by external
resistors and capacitors. The stand-by function enables the
output to be turned off (CE ’L’), that is, the supply current will
be less than 1.0µA.
■FEATURES
Operating Voltage Range:
2.5V ~ 6.0V
Output Voltage Range
Oscillation Frequency
ON Resistance
Efficiency
Control
Stand-by function
Load Capacitor
Lx Limit Current
: Up to 19.5V externally set-up
: Reference voltage 1.0V +2.0%
: 1.0MHz±20%
: 2.0Ω (V
DD
: 3.6V, V
DS
: 0.4V)
: 86%
(V
OUT
=15V, V
DD
=3.6V, I
OUT
=10mA)
: PWM control
: ISTB=1.0µA (MAX.)
: Low ESR cap. such as a
ceramic capacitor compatible
: 400mA (V
DD
:3.6V)
■TYPICAL
PERFORMANCE
CHARACTERISTICS
○Efficiency
vs. Output Current
XC9119D10A
100
90
80
70
60
50
40
30
20
10
0
0.1
1
■TYPICAL
APPLICATION CIRCUIT
L:22uH
CDRH4D18C
SD
XB01SB04A2BR
VOUT=15V
(up to 19.5V)
VIN
6V
5V
4.2V
VIN=2.5V
2.7V 3V
3.6V
RSS
220kΩ
CIN
4.7uF
C SS
0.1uF
V DD
Lx
RFB1
510kΩ
C FB
620pF
CL
10uF
CE/SS
V SS
FB
RFB2
36kΩ
Efficiency: EFFI(%)
T a=25
o
C
10
100
1000
Output Current: I
OUT
(mA)
1
XC9119D10A ETR0408_003
TOREX [ TOREX SEMICONDUCTOR ]
