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XC9505B092A Datasheet

  • XC9505B092A

  • 2ch. Step-Down / Inverting DC/DC Controller ICs

  • 47頁

  • TOREX

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XC9505 Series
"
2ch DC/DC Controller (Step-Down + Inverting)
"
Input Voltage Range 2.0V ~ 10.0V
"
Output Voltage Externally Set-Up
"
Oscillation Frequency 180kHz (鹵15%)
"
Max Duty Ratio
Step-Down : 100%
Inverting : 80% (Typ.)
"
PWM, PWM/PFM Switching Control
"
MSOP-10 Package
2ch. Step-Down / Inverting DC/DC Controller ICs
May 29, 2003 Ver 4
!
Applications
#
PDAs
#
Palm Top Computers
#
Portable Audio Systems
#
Various Multi-function Power Supplies
!
Features
2ch. DC/DC Controllers
Output 1: Step-Down DC/DC Controller
Output 2: Inverting DC/DC Controller
Power Supply Voltage Range
2.0V ~ 10V
Output Voltage Range
Output 1:
0.9V ~ 6.0V
(Step-Down DC/DC Controller)
Can be set freely with 0.9V(鹵
!
General Description
The XC9505 series are PWM control, PWM/PFM switching, 2
channel (step-down and inverting) DC/DC controller ICs.
With 0.9V of standard voltage supply internal, and using
externally connected components, the output 1 voltage (step-
down DC/DC controller) can be set freely within a range of 0.9V
~ 6.0V. Since output 2 (inverting DC/DC controller) has a
built-in 0.9V reference voltage (accuracy
鹵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 XC9505 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 .
2.0%) of reference voltage
supply & external components
Output 2:
(Inverting DC/DC Controller)
-30V ~ 0V
Can be set freely with 0.9V(鹵
2.0%) of reference voltage &
external components
180kHz 鹵15%
300kHz & 500kHz are available as custom
Oscillation Frequency
Output Current
Output 1 :
more than 1000mA (VIN=5.0V,VOUT=3.3V)
Output 2 :
more than - 100mA (VIN=5.0V,VOUT=- 7.5V)
Soft-Start Internally Set-Up (Output 1)
Stand-By Current
3.0碌A (MAX)
!
Typical Perfomance Characteristics
XC9505B092A (180kHz,V
OUT1
:3.3V,V
OUT2
:-7.5V)
Tr1,Tr2:XP162A12A6P, CL1, CL2=92uF(Tantalum),SD1:CMS02
SD2:MA2Q737,L1=47uH(CDRH6D28),L2=22uH(CDRH5D28)
PWM/PFM Switching Control
100
90
80
70
60
50
40
30
20
10
0
Efficiency 1,2 EFFI1,2 (%)
V
OUT2
:-7.5V
V
OUT1
:3.3V
PWM Control
V
IN
=5.0V
0.1
1
10
100
1000
Output Current 1,2 I
OUT1,2
(mA)
!
Typical Application
( XC9505B092A
Input: 2 Cell, Output
1
: 3.3V, Output
2
: -7.5V )
L1:22uH
CDRH5D28
Tr1:Pch M OSFET
X P 162A12A6P
Tr2:Pch M OSFET
X P162A 12A 6P
SD2
:M A2Q737
V OUT1 : 3 . 3 V
V OUT2 :-7.5V
SD1
:M A2Q737
CF B 1
:62pF
V IN
=5.0V
CIN
:47uF
L2:22uH
CDRH5D28
CL 2 :47uF
RF B 2 1
:150 k鈩?/div>
CF B 1
:88pF
RF B 1 1
:2 00k
鈩?/div>
CL 1 :47uF
1 EX T 1/
2 VDD
3 FB 1
E XT 2/10
GND 9
FB2 8
P W M2 7
E N2 6
VPWM 1
RF B 1 2
: 75k
鈩?/div>
V EN 1
4 PW M1
5 EN1
VPWM 2
V EN 2
RF B 2 2
:43 k鈩?/div>
1

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