XC9119D10A
Series
1MHz, PWM Controlled,
Step-Up DC/DC Converter, Ceramic Capacitor Compatible
ETR0408_004
■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.
■APPLICATIONS
●Organic
electroluminescene display (OELD)
●Power
supplies for LCD panels
●Various
general-purpose power supplies
■FEATURES
Operating Voltage Range
: 2.5V ~ 6.0V
Output Voltage Range
Oscillation Frequency
ON Resistance
Efficiency
Control
Stand-by function
Load Capacitor
Ultra Small Packages
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
: STB=1.0μA (MAX.)
: Low ESR cap. such as a
ceramic capacitor compatible
: SOT-25, USP-6C
: 400mA (VDD:3.6V)
■TYPICAL
APPLICATION CIRCUIT
■TYPICAL
PERFORMANCE
CHARACTERISTICS
○Efficiency
vs. Output Current
XC9119D10A
100
90
80
70
60
50
40
30
20
10
0
0.1
1
V IN
L:22uH
CDRH4D18C
SD
XB01SB04A2BR
VOUT=15V
(up to 19.5V)
6V
5V
4.2V
VIN=2.5V
2.7V 3V
3.6V
RSS
220kΩ
CIN
4.7uF
CSS
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
OU T
(mA)
1/18
TOREX [ TOREX SEMICONDUCTOR ]
