XC9501 Series
"
2ch DC/DC Controller (Step-up + Step-up)
"
Input Voltage Range 0.9V ~ 10.0V
"
Output Voltage Externally Set-Up
"
Switching Frequency 180kHz (鹵15%)
"
Max Duty Ratio 80% (TYP.)
"
PWM, PWM/PFM Switching Control
"
High Efficiency 83% (TYP.)
"
MSOP-10 Package
2ch. Step-up DC/DC Controller ICs.
Mar. 17, 2003 Ver. 5
!
Applications
#
PDAs
#
Palm top computers
#
Portable Audio Systems
#
Various Multi-function Power Supplies
!
Features
Input Voltage Range
:0.9V ~ 10V
Power Supply Voltage Range
:2.0V ~ 10V
Output Voltage Range
:1.5V ~ 30V
Can be set freely with 0.9V(鹵
2.0%) of reference voltage
supply & external components.
Switching Frequency
Output Current
Stand-by Current
Soft-start internally set-up
MSOP-10 Package
:180kHz 鹵15%
:300kHz & 500kHz available as custom
:more than 200mA(VIN=1.8V, VOUT=3.3V)
!
General Description
The XC9501 series are PWM controlled, PWM/PFM automatic
switching controlled, multi-functional, dual step-up DC/DC
converter controller ICs.
With 0.9V (鹵2%) of standard voltage supply internal, and using
externally connected components, output voltage can be set
freely on both DC/DC controllers between 1.5V to 30V.
With a 180kHz frequency, the size of the external components
can be reduced. 300kHz and 500kHz switching frequencies
are also available as custom-designed products.
The control of the XC9501 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 to large output currents.
Noise is easily reduced with PWM control since the switching
frequency is fixed.
The XC9501 series provides the option of being able to select
the control suited to the application.
:3.0碌A(chǔ)
(MAX)
!
Typical Performance Characteristics
Efficiency vs. Output Current
XC9501B092A (180kHz,3.3V)
100
90
80
70
60
50
40
30
20
10
0
L1=22碌H(CDRH5D28), C
L1
=47碌F(Tantalum)
SD1:MA2Q737, Tr1:XP161A1355P
PWM/PFM Switching Control
Soft-start time is internally set to 10msec which offers
protection against rush currents when the power is switched on
and also against voltage overshoot.
Efficiency 1 EFFI1 (%)
VIN=1.8V
PWM Control
2.4V
0.1
1
10
100
1000
!
Typical Application
( XC9501B092A
V
OUT1
=3.3V
IOUT1=~200mA
Output Current 1 I
OUT1
(mA)
Input: 2 cells, Output
SD1
:MA2Q737
1
: 3.3V, Output
2
: 5.0V )
L2:22碌H
CDRH5D28
C
IN
:47碌F
Tr2:Nch MOSFET
XP161A1355P
SD2
:MA2Q737
V
OUT2
=5.0V
IOUT2=~100mA
L1:22uH
CDRH5D28
V
IN
Tr1:Nch
=1.8V~3.2V
MOSFETXP161A1355P
R
FB11
:200k鈩?/div>
C
FB1
:62pF
1 EXT1
EXT2 10
GND 9
FB2 8
PWM2 7
EN2 6
V
PWM2
V
EN2
C
FB2
:160pF
R
FB21
:82k鈩?/div>
+
C
L1
47碌F
?
V
PWM1
R
FB12
:75k鈩?/div>
V
EN1
2 VDD
3 FB1
4 PWM1
5 EN1
+
47碌F C
L2
R
FB22
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