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LT1470

更新时间： 2024-09-16 22:51:51
品牌 Logo 应用领域
凌特 - Linear 开关PC
页数 文件大小 规格书
12页 230K
描述
Single and Dual PCMCIA Protected 3.3V/5V VCC Switches

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中文翻译

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LT1470 数据手册

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LTC1470/LTC1471  
Single and Dual  
PCMCIA Protected  
3.3V/5V VCC Switches  
U
DESCRIPTION  
FEATURES  
The LTC®1470 switches the VCC pins of a Personal Com-  
puter Memory Card International Association (PCMCIA)  
card slot between three operating states: OFF, 3.3V and  
5V. Two low RDS(ON) N-channel power MOSFETs are  
driven by a built-in charge pump which generates a  
voltage higher than the supply voltage to fully enhance  
each switch when selected by the input control logic.  
■
Single 3.3V/5V Switch in 8-Pin SO Package  
■
Dual 3.3V/5V Switch in 16-Pin SO Package  
■
Built-In Current Limit and Thermal Shutdown  
■
Built-In Charge Pumps (No 12V Required)  
■
Extremely Low RDS(ON) MOSFET Switches  
■
Output Current Capability: 1A  
Inrush Current Limited (Drives 150µF Loads)  
Quiescent Current in Standby: 1µA  
No Parasitic Body Diodes  
Built-In XOR Function Eliminates “Glue” Logic  
Break-Before-Make Switching  
■
■
The LTC1470 inputs are compatible with industry stan-  
dardPCMCIAcontrollers.Abuilt-inXORensuresthatboth  
switches are never on at the same time. This function also  
makes the LTC1470 compatible with both active-low and  
active-high controllers (see Applications Information sec-  
tion). The switch rise times are controlled to eliminate  
power supply glitching.  
The LTC1470 features built-in SafeSlotTM current limit and  
thermalshutdown.Theoutputislimitedto1Aduringshort  
circuit to ground but 2A of peak operating current is  
allowed.  
■
■
■
■
Controlled Rise and Fall Times  
U
APPLICATIONS  
■
Notebook Computers  
■
Palmtop Computers  
■
Pen-Based Computers  
■
Handi-Terminals  
■
PC Card Reader/Writers  
3.3V/5V Power Supply Switch  
The LTC1471 is a dual version of the LTC1470 and is  
available in a 16-pin SO package.  
■
, LTC and LT are registered trademarks of Linear Technology Corporation.  
SafeSlot is a trademark of Linear Technology Corporation.  
U
TYPICAL APPLICATION  
Dual Slot PCMCIA 3.3V/5V VCC Switch  
Linear Technology PCMCIA Product Family  
5V  
3.3V  
0.1µF  
DEVICE  
LT®1312 Single PCMCIA VPP Driver/Regulator  
LT1313 Dual PCMCIA VPP Driver/Regulator  
DESCRIPTION  
PACKAGE  
8-Pin SO  
0.1µF  
V
V
CC  
CC  
5V  
IN  
3V  
PCMCIA  
IN  
16-Pin SO*  
14-Pin SO  
24-Pin SSOP  
8-Pin SO  
(Hi-Z/3.3V/5V)  
CARD SLOT  
AOUT  
LTC1314 Single PCMCIA Switch Matrix  
LTC1315 Dual PCMCIA Switch Matrix  
+
10k  
10k  
1µF  
LTC1471  
AEN1  
V
V
LTC1470 Single Protected V 3.3V/5V Switch Matrix  
CC  
CC  
CC  
PCMCIA  
CARD SLOT  
CONTROLLER  
AEN0  
BEN1  
BEN0  
PCMCIA  
CARD SLOT  
LTC1471 Dual Protected V 3.3V/5V Switch Matrix  
16-Pin SO*  
16-Pin SO*  
CC  
(Hi-Z/3.3V/5V)  
BOUT  
GND  
LTC1472 Protected V and VPP Switch Matrix  
CC  
+
1µF  
*Narrow Body  
1470/71 TA01  
1
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