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LT1312

更新时间： 2024-09-14 22:55:51
品牌 Logo 应用领域
凌特 - Linear 驱动器稳压器PC
页数 文件大小 规格书
12页 260K
描述
Single PCMCIA VPP Driver/Regulator

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中文翻译

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LT1312 数据手册

 浏览型号LT1312的Datasheet PDF文件第2页浏览型号LT1312的Datasheet PDF文件第3页浏览型号LT1312的Datasheet PDF文件第4页浏览型号LT1312的Datasheet PDF文件第5页浏览型号LT1312的Datasheet PDF文件第6页浏览型号LT1312的Datasheet PDF文件第7页 
LT1312  
Single PCMCIA  
VPP Driver/Regulator  
U
FEATURES  
DESCRIPTION  
The LT®1312 is a member of Linear Technology  
Corporation’s family of PCMCIA drivers/regulators. The  
LT1312 provides 0V, 3.3V, 5V, 12V and Hi-Z regulated  
power to the VPP pin of a PCMCIA card slot from a single  
unregulated13Vto20Vsupply. Whenusedinconjunction  
with a PC card interface controller, the LT1312 forms a  
complete minimum component-count interface for palm-  
top, pen-basedandnotebookcomputers. TheVPPoutput  
voltage is selected by two logic compatible digital inputs  
which interface directly with industry standard PC card  
interface controllers.  
■
Digital Selection of 0V, VCC, 12V or Hi-Z  
■
120mA Output Current Capability  
■
Internal Current Limiting and Thermal Shutdown  
■
Automatic Switching from 3.3V to 5V  
■
Powered from Unregulated 13V to 20V Supply  
■
Logic Compatible with Standard PCMCIA Controllers  
■
1µF Output Capacitor  
■
30µA Quiescent Current in Hi-Z or 0V Mode  
VPP Valid Status Feedback Signal  
No VPP Overshoot  
■
■
■
8-Pin SO Packaging  
Automatic 3.3V to 5V switching is provided by an internal  
comparator which continuously monitors the PC card VCC  
supply and automatically adjusts the regulated VPP out-  
put to match VCC when the VPP = VCC mode is selected.  
U
APPLICATIONS  
■
Notebook Computers  
Palmtop Computers  
Pen-Based Computers  
■
An open-collector VPP VALID output is driven low when  
VPP is in regulation at 12V.  
■
■
Handi-Terminals  
■
Bar-Code Readers  
Flash Memory Programming  
The LT1312 is available in an 8-pin SO package.  
■
, LTC and LT are registered trademarks of Linear Technology Corporation.  
U
TYPICAL APPLICATION  
Typical PCMCIA Single Slot VPP Driver  
13V TO 20V  
V
S
Linear Technology PCMCIA Product Family  
VPP1  
VPP2  
EN0  
EN1 LT1312  
VALID SENSE  
GND  
VPP  
OUT  
PCMCIA  
CARD SLOT  
CONTROLLER  
DEVICE  
LT1312  
LT1313  
DESCRIPTION  
PACKAGE  
PCMCIA  
CARD SLOT  
SINGLE PCMCIA VPP DRIVER/REGULATOR 8-PIN SO  
V
CC  
DUAL PCMCIA VPP DRIVER/REGULATOR  
LTC®1314 SINGLE PCMCIA SWITCH MATRIX  
16-PIN SO*  
14-PIN SO  
24-PIN SSOP  
8-PIN SO  
3.3V OR 5V  
OUT  
LT1312 TA1  
+
C
1µF  
LTC1315 DUAL PCMCIA SWITCH MATRIX  
TANTALUM  
LTC1470 PROTECTED V 5V/3.3V SWITCH MATRIX  
CC  
LT1312 TRUTH TABLE  
LTC1472 PROTECTED V AND VPP SWITCH MATRIX 16-PIN SO*  
CC  
EN0  
EN1  
SENSE  
X
X
3.0V TO 3.6V  
4.5V TO 5.5V  
X
VPPOUT  
0V  
12V  
3.3V  
5V  
VALID  
0
1
0
0
0
0
1
1
1
1
0
1
1
1
*NARROW BODY  
1
Hi-Z  
X = DON’T CARE  
1
1234567...12

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