XC9119D10A Datasheet, PDF (1/16 Pages) Torex Semiconductor – 1MHz, PWM Controlled, Step-Up DC/DC Converter, Ceramic Capacitor Compatible

◆Operating Voltage Range : 2.5V ~ 6.0V
■APPLICATIONS
◆Output Voltage Externally Set-Up
: Vref =1.0V ± 2.0%
(Can be set freely up to 19.5V)
●Organic electroluminescene display (OELD)
●Power supplies for LCD panels
◆Oscillation Frequency
●Various general-purpose power supplies
: 1.0MHz (Accuracy ± 20%)
◆High Efficiency : 86%
(VDD=3.6V, VOUT=15V, IOUT=10mA)
◆Ultra Small Packages
: SOT-25, USP-6C
■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.): VDD=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.
■TYPICAL APPLICATION CIRCUIT
■FEATURES
Operating Voltage Range: 2.5V ~ 6.0V
Output Voltage Range : Up to 19.5V externally set-up
Oscillation Frequency
ON Resistance
Efficiency
: Reference voltage 1.0V +2.0%
: 1.0MHz±20%
: 2.0Ω (VDD: 3.6V, VDS: 0.4V)
: 86%
Control
(VOUT=15V, VDD=3.6V, IOUT=10mA)
: PWM control
Stand-by function
: ISTB=1.0µA (MAX.)
Load Capacitor
: Low ESR cap. such as a
ceramic capacitor compatible
Lx Limit Current
: 400mA (VDD:3.6V)
■TYPICAL PERFORMANCE
CHARACTERISTICS
○Efficiency vs. Output Current
XC9119D10A
L:22uH
SD
CDRH4D18C XB01SB04A2BR
VIN
RSS
220kΩ
C IN
4.7uF
C SS
0.1uF
VDD
Lx
CE/SS
FB
V SS
RFB1
510kΩ
RFB2
36kΩ
VOUT=15V
(up to 19.5V)
C FB
620pF
CL
10uF
XC9119D10A ETR0408_003
100
90
80
70
60
50
40
30
20
10
0
0.1
6V
5V
4.2V
VIN=2.5V
3.6V
2.7V ^3V
T a =2 5 ^oC
1
10
100
Output Current: IOUT (mA)
1000
1