LT1312CS8 Linear Technology, LT1312CS8 Datasheet

IC DRVR/REG PCMCIA VPP SNGL8SOIC

LT1312CS8

Manufacturer Part Number
LT1312CS8
Description
IC DRVR/REG PCMCIA VPP SNGL8SOIC
Manufacturer
Linear Technology
Datasheet

Specifications of LT1312CS8

Applications
PCMCIA Driver/Regulator, PCMCIA Card Slot
Voltage - Input
13 ~ 20 V
Number Of Outputs
1
Voltage - Output
3.3V, 5V, 12V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LT1312CS8
Manufacturer:
LT
Quantity:
10 000
Part Number:
LT1312CS8#PBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Part Number:
LT1312CS8#TRPBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
APPLICATIONS
FEATURES
I
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I
I
I
I
I
I
I
I
I
I
I
I
I
I
TYPICAL
CONTROLLER
CARD SLOT
Contact Linear Technology for Potential Replacement
Digital Selection of 0V, V
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
Notebook Computers
Palmtop Computers
Pen-Based Computers
Handi-Terminals
Bar-Code Readers
Flash Memory Programming
PCMCIA
LT1312 TRUTH TABLE
X = DON’T CARE
FOR INFORMATION PURPOSES ONLY
EN0
0
1
0
0
1
Typical PCMCIA Single Slot VPP Driver
APPLICATION
EN1
0
0
1
1
1
OBSOLETE:
VALID
EN0
EN1
13V TO 20V
U
LT1312
GND
V
S
VPP
SENSE
3.0V TO 3.6V
4.5V TO 5.5V
OUT
SENSE
X
X
X
CC
+
, 12V or Hi-Z
U
C
1µF
TANTALUM
OUT
3.3V OR 5V
VPP
3.3V
12V
Hi-Z
0V
5V
OUT
VPP1
VPP2
V
VALID
CC
CARD SLOT
1
0
1
1
1
PCMCIA
LT1312 TA1
DESCRIPTION
DEVICE
LT1312
LT1313
LTC
LTC1315
LTC1470
LTC1472
*NARROW BODY
The LT
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
unregulated 13V to 20V supply. When used in conjunction
with a PC card interface controller, the LT1312 forms a
complete minimum component-count interface for palm-
top, pen-based and notebook computers. The VPP output
voltage is selected by two logic compatible digital inputs
which interface directly with industry standard PC card
interface controllers.
Automatic 3.3V to 5V switching is provided by an internal
comparator which continuously monitors the PC card V
supply and automatically adjusts the regulated VPP out-
put to match V
An open-collector VPP VALID output is driven low when
VPP is in regulation at 12V.
The LT1312 is available in an 8-pin SO package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
®
1314 SINGLE PCMCIA SWITCH MATRIX
®
1312 is a member of Linear Technology
DESCRIPTION
SINGLE PCMCIA VPP DRIVER/REGULATOR
DUAL PCMCIA VPP DRIVER/REGULATOR
DUAL PCMCIA SWITCH MATRIX
PROTECTED V
PROTECTED V
Linear Technology PCMCIA Product Family
CC
VPP Driver/Regulator
when the VPP = V
U
CC
CC
5V/3.3V SWITCH MATRIX
AND VPP SWITCH MATRIX 16-PIN SO*
Single PCMCIA
CC
mode is selected.
LT1312
PACKAGE
8-PIN SO
16-PIN SO*
14-PIN SO
24-PIN SSOP
8-PIN SO
1
CC

Related parts for LT1312CS8

LT1312CS8 Summary of contents

Page 1

... VPP out- put to match V An open-collector VPP VALID output is driven low when VPP is in regulation at 12V. The LT1312 is available in an 8-pin SO package. , LTC and LT are registered trademarks of Linear Technology Corporation. VPP1 VPP2 DEVICE PCMCIA CARD SLOT ...

Page 2

... VALID Program to 0V 12V VALID Note 1: For junction temperatures greater than 110 C, a minimum load of 1mA is recommended INFORMATION ORDER PART TOP VIEW NUMBER 8 VPP OUT 7 N.C. LT1312CS8 SENSE 5 S8 PART MARKING S8 PACKAGE 1312 = 125 C, = 150 MIN TYP MAX 11.52 12.00 12.48 4 ...

Page 3

W U TYPICAL PERFORMANCE CHARACTERISTICS Quiescent Current (0V or Hi-Z Mode 25°C J EN0 = EN1 EN0 = EN1 SUPPLY VOLTAGE (V) LT1312 ...

Page 4

LT1312 W U TYPICAL PERFORMANCE CHARACTERISTICS Enable Input Threshold Voltage 3 15V S 2.5 2.0 1.5 1.0 0 100 125 JUNCTION TEMPERATURE (°C) LT1312 G10 V Sense Input Current ...

Page 5

PIN FUNCTIONS Supply Pin: Power is supplied to the device through the supply pin. The supply pin should be bypassed to ground if the device is more than 6 inches away from the main supply capacitor. A ...

Page 6

... Burst Mode and the LTC1142HV is forced into continuous mode operation. (See the LTC1142HV data sheet for further detail). In this mode, the 14V auxiliary supply can be Burst Mode is a trademark of Linear Technology Corporation. CC mode is selected, CC supply pin. The threshold CC – ...

Page 7

U U APPLICATIONS INFORMATION V IN 6.5V TO 18V PDRIVE Q1 1/2 LTC1142HV 20 D3 NDRIVE Q2 5V REG MBRS130T3 15 SENSE C2 1000pF 14 – SENSE R3 18k Q3 VN7002 EN0 EN1 VALID *LPE-6562-A026 DALE ...

Page 8

LT1312 APPLICATIONS INFORMATION inductor as shown in Figure 3. MOSFET Q4 and diode D4 have been added and diode longer used. In the previous circuit, power is drawn directly from the batteries through D1, ...

Page 9

U U APPLICATIONS INFORMATION GND Figure 4. Local 5V to 15V Boost Regulator for Line Operated Applications 12V + 100 LIM LT1111CS8 GND Figure 5. Local 12V to 15V Boost Regulator for ...

Page 10

LT1312 APPLICATIONS INFORMATION Transient and Switching Performance The LT1312 is designed to produce minimal overshoot with capacitors in the range Larger capacitor values can be used with a slowing of rise ...

Page 11

... CC Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. Single Slot Interface to CL-PD6710 13V TO 20V ...

Page 12

... TYP 0.014 – 0.019 (0.355 – 0.483) : 499-3977 0.189 – 0.197* (4.801 – 5.004 0.150 – 0.157* (3.810 – 3.988 0.004 – 0.010 (0.101 – 0.254) 0.050 (1.270) BSC SO8 0294 LT/GP 0894 10K • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1994 ...

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