XC9504 Datasheet, PDF (1/50 Pages) Torex Semiconductor – 2ch. Step-up / Inverting DC/DC Controller ICs

XC9504 Series
2ch. Step-up / Inverting DC/DC Controller ICs
Mar. 20, 2003 Ver 3
2ch DC/DC Controller (Step-up + Inverting)
Input Voltage Range 0.9V ~ 10.0V
Output Voltage Externally Set-Up
Oscillation Frequency 180kHz (±15%)
Max Duty Ratio 80% (TYP)
PWM, PWM/PFM Switching Control
MSOP-10 Package
General Description
The XC9504 series are PWM control, PWM/PFM switching, 2
channel (step-up and inverting) DC/DC controller ICs.
With 0.9V of standard voltage supply internal, and using
externally connected components, the output 1 voltage (step-up
DC/DC controller) can be set freely within a range of 1.5V ~
30V. Since output 2 (inverting DC/DC controller) has a built-in
0.9V reference voltage (accuracy ±2), a negative voltage can be
set with the external components.
With a 180kHz frequency, the size of the external components
can be reduced. Switching frequencies of 300kHz and 500kHz
are also available as custom-designed products.
The control of the XC9504 series can be switched between
PWM control and PWM/PFM automatic switching control using
external signals. Control switches from PWM to PFM during
light loads when automatic switching is selected and the series
is highly efficient from light loads through to large output
currents. Noise is easily reduced with PWM control since the
frequency is fixed.
The series gives freedom of control selection so that control
suited to the application can be selected.
Soft-start time is internally set to 10msec (output 1)
which offers protection against rush currents and voltage
overshoot when the power is switched on .
Applications
Power Supplies for LCD
PDAs
Palm Top Computers
Portable Audio Systems
Various Multi-function Power Supplies
Features
2ch. DC/DC Controllers
Output 1: Step-up DC/DC Controller
Output 2: Inverting DC/DC Controller
Power Supply Voltage Range 2.0V ~ 10V
Output Voltage Range
Output 1:
1.5V ~ 30.0V
(Step-up DC/DC Controller)
Can be set freely with 0.9V(±
2.0%) of reference voltage
supply & external components
Output 2:
(Inverting DC/DC Controller)
-30V ~ 0V
Can be set freely with 0.9V(±
2.0%) of reference voltage &
external components
Oscillation Frequency
180kHz ±15%
Output Current
300kHz & 500kHz are available as custom
Output 1 : more than 20mA (VIN=3.3V,VOUT=15V)
Output 2 : more than - 20mA (VIN=3.3V,VOUT=- 7V)
Soft-Start Internally Set-Up (Output 1)
Stand-By Current
3.0µA (MAX)
Typical Perfomance Characteristics
XC9504B092A
(180kHz, Output 1 = 15V, Output 2 = - 7.5V)
L1=22µH (CDRH4D18C), CL1=- 10µF (ceramic), SD1: CRS02, Tr1:XP151A12A2M
L2=22µH (CDRH4D18C), CL2= 10µF (ceramic), SD1: CRS02, Tr2:XP152A12C0M
15.4
-7.3
15.2
VOUT1
-7.4
15.0
-7.5
14.8
VOUT2
-7.6
14.6
-7.7
Typical Application
( XC9504B092A Input: 3.3V, Output 1: 15V, Output 2: -7V )
14.4
0
10
20
30
40
50
Output Current 1,2 IOUT1,2(mA)
VOUT1=15V
SD1
IOUT1=~20mA :MA2Q735
L1:22uH
D412F
VIN=3.3V
Tr2:Pch MOSFET
XP152A12C0
SD2
:MA2Q735
VOUT2=7V
IOUT2=~20mA
RFB11 CFB1
:470kΩ :5pF
CL1
10uF
Tr1:Nch MOSFET
XP151A12A2
CIN=47uF
CDD=1uF
VPW M1
1 EXT1 EXT2/ 10
2 VDD GND 9
3 FB1
FB2 8
4 PWM1 PWM2 7
L2:22uH
D412F
CL2
:10uF
RFB21
24kΩ
CFB21
=0.1uF
VPW M2
RFB12 :30kΩ
VEN1
5 EN1
EN2 6
VEN2
RFB22
:43kΩ
-7.8
60
1