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XC9511E146SRL PDF预览

XC9511E146SRL

更新时间： 2022-04-23 23:00:11
品牌 Logo 应用领域
特瑞仕 - TOREX 转换器稳压器
页数 文件大小 规格书
13页 171K
描述
Synchronous Step-Down DC/DC Converter with built-in LDO Regulator in parallel plus Voltage Detector

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XC9511E146SRL 数据手册

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February 2, 2004 V5  
XC9511 Series  
Synchronous Step-Down DC/DC Converter with built-in LDO Regulator in parallel plus Voltage Detector  
Preliminary  
! Synchronous step-down DC/DC converter  
with built-in LDO regulator plus voltage detector  
! Step-down DC/DC converter's output connected in parallel  
with LDO regulator  
! APPLICATIONS  
" CD-R / RW, DVD  
" HDD  
" PDAs, portable communication modem  
" Cellular phones  
! SOP-8 package for high current  
! Small-footprint  
" Palmtop computers  
" Cameras, video recorders  
! Output Current (DC/DC : 800mA, VR : 400mA)  
! Ceramic capacitor compatible (Low ESR capacitors)  
! GENERAL DESCRIPTION  
! FEATURES  
Input Voltage Range : 2.4V ~ 6.0V  
The XC9511 series consists of a step-down DC/DC converter and a  
high-speed LDO regulator connected in parallel with the DC/DC  
converter's output. A voltage detector is also built-in. Since the input  
for the LDO voltage regulator block comes from the input power  
supply, it is suited for use with various applications.  
The DC/DC converter block incorporates a P-Channel driver transistor  
and a synchronous N-Channel switching transistor. With an external  
coil, diode and two capacitors, the XC9511 can deliver output currents  
up to 800mA at efficiencies over 90%. The XC9511 is designed for  
use with small ceramic capacitors.  
Load Capacitors :  
VD Function :  
Ceramic Capacitor Compatible  
(Low ESR Capacitors)  
Detects output voltage from the VDOUT pin  
while sensing either VDD, DCOUT,  
or VROUT internally.  
Nch Open Drain Output  
<DC/DC Converter>  
A choice of three switching frequencies are available, 300 kHz,  
600 kHz, and 1.2 MHz.  
Output voltage settings for the DC/DC and VR are set-up internally in  
100mV steps within the range of 0.9V to 4.0V (± 2.0%). For the VD,  
the range is of 0.9V to 5.0V (± 2.0%).  
Output Voltage Range : 0.9V ~ 4.0V (Accuracy ±2%)  
Output Current :  
Controls :  
800mA  
PWM Control  
The soft start time of the series is internally set to 5ms. With the built-  
in U.V.L.O. (Under Voltage Lock Out) function, the internal P-channel  
driver transistor is forced OFF when input voltage becomes 1.4 V or  
lower.  
PWM, PWM / PFM Automatic  
Switching External  
Oscillation Frequency : 300kHz, 600kHz, 1.2MHz  
<Regulator>  
Output Voltage Range : 0.9V ~ 4.0V (Accuracy ±2%)  
Current Limit  
600mA  
Dropout Voltage :  
160mV @ IOUT=200mA (VOUT=2.8V)  
High Ripple Rejection 60dB @1kHz (VOUT=2.8V)  
! TYPICAL APPLICATION CIRCUIT  
! TYPICAL PERFORMANCE CHARACTERISTICS  
XC9511Axxxx  
O
VIN=5.0V, Topr=25 C, L:4.7uH(CDRH4D28C)  
CIN:4.7uF(ceramic), CL1:10uF(ceramic), CL2:1uF(ceramic)  
100  
L
DCOUT  
1
2
3
4
LX  
DCOUT  
VROUT  
8
7
6
5
PGND  
PVDD  
90  
80  
70  
60  
50  
40  
VROUT  
AVDD  
+
+
CIN1  
VDOUT  
CL2  
+
+
AGND  
CIN2  
CL1  
( )  
SD  
30  
SOP-8 (TOP VIEW)  
DC/DC Efficiency  
20  
10  
0
(DCOUT:3.3V, 1.2MHz)  
0.1  
1
10  
100  
1000  
DC/DC Output Current IDOUT  
Semiconductor Ltd.  
Data Sheet  
1
1234567...13

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