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XC9502B092AR 参数 Datasheet PDF下载

XC9502B092AR图片预览
型号: XC9502B092AR
PDF下载: 下载PDF文件 查看货源
内容描述: 双声道。升压/降压DC / DC控制器IC [2ch. Step-up / down DC/DC Controller ICs]
分类和应用: 稳压器开关式稳压器或控制器电源电路开关式控制器
文件页数/大小: 40 页 / 628 K
品牌: TOREX [ TOREX SEMICONDUCTOR ]
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XC9502 Series
"
2ch DC/DC Controller (Step-up + Step-down)
"
Input Voltage Range 0.9V ~ 10.0V
"
Output Voltage Externally Set-Up
"
Switching Frequency 180kHz (±15%)
Step-up
80% (Typ.)
Step-down 100%
"
PWM, PWM/PFM Switching Control
"
High Efficiency
Step-up
85% (Typ.)
Step-down 92% (Typ.)
"
Small MSOP-10 package
"
Maximum Duty Cycle
2ch. Step-up / down DC/DC Controller ICs
Mar, 14 2003 Ver. 2
!
Applications
#
PDAs
#
Palm Top Computers
#
Portable Audio Systems
#
Various Multi-Function Power Supplies
!
Features
2ch DC/DC Controller
Output 1 : Step-up DC/DC Controller
Output 2 : Step-down DC/DC Controller
Power Supply Voltage Range
: 2.0V ~ 10V
Output Voltage Range
Output 1 (Step-up) : 1.5V ~ 30.0V
Can be set freely with 0.9V
(±2.0%) of reference voltage supply
and external components.
Output 2 (Step-down) : 0.9V ~ 6.0V
Can be set freely with 0.9V
(±2.0%) of reference voltage supply
and external components.
Oscillation Frequency
Output Current
Stand-By Function
Package
Soft-Start Time
Output 1
Output 2
: 180kHz
±15%
!
General Description
The XC9502 series are PWM controlled, PWM/PFM automatic
switching controlled, multi-functional, 2 channel step-up and
down 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 to 30V. Since the output 2 (step-
down DC/DC controller) has a built-in 0.9V reference voltage
(accuracy ±2%), 0.9V to 6.0V can be set using external
components. With a 180kHz frequency, the size of the
external components can be reduced. Switching frequencies
of 300kHz & 500kHz are also available as custom-designed
products.
The control of the XC9502 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.
(300kHz, 500kHz custom)
: more than 300mA
(V
IN
=1.8V, V
OUT
=3.3V)
: more than 1000mA (VIN=3.3V, VOUT=1.8V)
: 3.0µA (MAX.)
: MSOP-10
: 10 ms (internally set)
!
Typical Performance Characteristics
XC9502B093A (300kHz,VOUT1:3.3V,VOUT2:1.8V)
L1=15µH,L2=22µH(CDRH5D28),C
L1,
C
L2
=92µF(Tantalum)
SD1,SD2:CMS02, Tr1:XP161A1355P,Tr2:XP162A12A6P
Efficiency 1,2 EFFI1,2 (%)
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) and offers protection
against in-rush currents when the power is switched. This also
prevents voltage overshoot.
!
Typical Application Circuit
XC9502B092A Input :
2 cell, VOUT1 : 3.3V, VOUT2 : 1.8V
V
OUT
1:3.3V
SD1
:MA2Q737
L1:22µH
CDRH5D28
Tr2:Pch
MOSFET
XP162A12A6P
100
90
80
70
60
50
40
30
20
10
0
PWM/PFM Switching Control
V
OUT1
:3.3V
V
OUT2
:1.8V
PWM Control
V
IN
=2.7V
0.1
1
10
100
1000
Output Current 1,2 I
OUT1,2
(mA)
L2:22µH
CDRH5D28
V
OUT
2:1.8V
SD2
:MA2Q737
RFB11
:200kΩ
CL1
:47µFX2
CFB1
:62pF
Tr2:Nch
MOSFET
:XP161A1355P
VIN
=2.0V
~3.0V
C
IN
:47µF
CFB2
:62pF
RFB21
:220kΩ
CL2
:47µFX2
1 EXT1 EXT2/ 10
2 VDD
3 FB1
GND 9
FB2 8
V
PW M1
RFB12
:75kΩ
V
NE1
4 PW M1 PW M2 7
5 EN1
EN2 6
V
PW M2
V
NE2
RFB22
:220kΩ
1