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XC9503B093AR 参数 Datasheet PDF下载

XC9503B093AR图片预览
型号: XC9503B093AR
PDF下载: 下载PDF文件 查看货源
内容描述: 2通道降压型DC / DC控制器IC [2ch Step-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光电二极管
文件页数/大小: 30 页 / 398 K
品牌: TOREX [ TOREX SEMICONDUCTOR ]
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XC9503 Series
2ch. Step-down DC/DC Controller ICs
Mar. 14, 2003 Ver. 2
Applications
2ch DC/DC Controller (Step-down + Step-down)
Input Voltage Range 2.0V ~ 10.0V
Output Voltage Externally Set-Up
Switching Frequency 300kHz (±15%)
Maximum Duty Cycle 100%
PWM, PWM/PFM Switching Control
High Efficiency
Step-down 92% (Typ.)
Small MSOP-10 package
PDAs
Palm Top Computers
Digital Cameras
Various Multi-Function Power Supplies
Features
Input Voltage Range
: 2.0V ~ 10V
Power Supply Voltage Range
: 2.0V ~ 10V
Output Voltage Range
: 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
: 300kHz
±15%
General Description
The XC9503 series are PWM controlled, PWM/PFM automatic
switching controlled, multi-functional, 2 channel step-down
DC/DC controller ICs. Since the series has a built-in 0.9V
reference voltage (accuracy ±2%), 0.9V to 6.0V can be set
using external components. With a 300kHz frequency, the size
of the external components can be reduced. Switching
frequencies of 180kHz & 500kHz are also available as custom-
designed products.
The control of the XC9503 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 to select control suited to
the application. Soft-start time is internally set to 10msec and
offers protection against in-rush currents when the power is
switched on and also protects against voltage overshoot.
(180kHz, 500kHz custom)
: more than 1000mA (VIN=5.0V, VOUT=3.3V)
: 3.0µA (MAX.)
: MSOP-10
: 10 ms (internally set)
Typical Performance Characteristics
XC9503B093A (300kHz,VOUT1:3.3V)
L1=22µH(CDRH5D28), C
L1
=47µF(Tantalum)
SD1:MA2Q737, Tr1:XP162A1355P
100
90
Efficiency 1 EFFI1 (%)
80
70
60
50
40
30
20
10
0
0.1
PWM
PWM/PFM Switching
VIN=5.0V
Typical Application Circuit
XC9503B093A Input :
VOUT1 : 3.3V, VOUT2 : 1.8V
L1:22µH
CDRH5D28
Tr1:Pch MOSFET
XP162A12A6P
1
10
100
Output Current 1 I
OUT1
(mA)
1000
VOUT1:3.3V
Tr2:Pch MOSFET
XP162A12A6P
L2:22µH
CDRH5D28
VOUT2:1.8V
SD2
:MA2Q737
SD1
:MA2Q737
RFB11
:200kΩ
CFB1
:62pF
VIN
=5.0V
CIN
:47µF
CFB2
:62pF
1 EXT1/
EXT2/ 10
GND 9
FB2 8
PWM2 7
EN2 6
VPWM2
VEN2
RFB21
:220kΩ
CL2:
47µFX2
CL1:
47µFX2
VPWM1
2 VDD
3 FB1
4 PWM1
5 EN1
RFB12
:75kΩ
VEN1
RFB22
:220kΩ
1