LTC1472CS Linear Technology, LTC1472CS Datasheet

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LTC1472CS

Manufacturer Part Number
LTC1472CS
Description
IC SWITCHNG MATRIX PCMCIA 16SOIC
Manufacturer
Linear Technology
Type
PCMCIA/Cardbus Switchr
Datasheet

Specifications of LTC1472CS

Number Of Outputs
1
Rds (on)
180 mOhm
Internal Switch(s)
Yes
Current Limit
1A
Voltage - Input
3.3V, 5V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
16-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

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FEATURES
TYPICAL APPLICATIO
APPLICATIO S
3.3V
CONTROLLER
5V
CARD SLOT
PCMCIA
Both V
Built-In Current Limit and Thermal Shutdown
16-Pin (Narrow) SOIC Package
Inrush Current Limited (Drives 150µF Loads)
Continuous 12V Power Not Required
Extremely Low R
Guaranteed 1A V
1µA Quiescent Current in Standby
No External Components Required
Compatible with Industry Standard Controllers
Break-Before-Make Switching
Controlled Rise and Fall Times
OpenCable Set Top Box
Notebook Computers
Palmtop Computers
Pen-Based Computers
Bar-Code Readers
0.1µF
0.1µF
Protected PCMCIA V
CC
and VPP Switching in a Single Package
5V
V
VPP EN0
VPP EN1
V
V
DD
CC
CC
IN
3V
EN0
EN1
IN
LTC1472
U
CC
DS(ON)
GND
Current and 120mA VPP Current
V
VPP
VPP
CC(OUT)
V
SHDN
CC(IN)
IN
OUT
NMOS Switches
CC
and VPP Card Driver
OV, V
TO 12V REGULATOR
U
OFF, 3.3V, 5V
CC
10k
, 12V, Hi-Z
0.1µF
0.1µF
+
12V
1µF
VPP1
VPP2
CARD SLOT
V
V
CC
CC
PCMCIA
LTC1472-TA01
DESCRIPTIO
DEVICE
LT
LT1313
LTC1314
LTC1315
LTC1470
LTC1471
LTC1472
*Narrow Body
The LTC
V
card socket. The V
between three operating states: OFF, 3.3V, and 5V. The
VPP output is switched between four operating states: 0V,
V
two sets of digital inputs which are compatible with
industry standard PC Card controllers (see Truth Tables).
The V
current and the VPP output up to 120mA. Both switches
have built-in SafeSlot
down to protect the card, socket and power supply against
accidental short-circuit conditions.
The LTC1472 is designed to conserve power by automati-
cally dropping to 1µA standby current when the two
outputs are switched OFF. A shutdown pin is provided
which holds the external 12V regulator in standby mode
except when required for VPP power.
The LTC1472 is available in 16-pin SO package.
SafeSlot is a trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Protected PCMCIA V
CC
CC
®
, LTC and LT are registered trademarks of Linear Technology Corporation.
1312
, 12V, and Hi-Z. The output voltages are selected by
and VPP power supply pins of the PCMCIA compatible
CC
®
output of the LTC1472 can supply up to 1A of
1472 switching matrix routes power to both the
DESCRIPTION
Single PCMCIA VPP Driver/Regulator
Dual PCMCIA VPP Driver/Regulator
Single PCMCIA Switch Matrix
Dual PCMCIA Switch Matrix
Protected V
Dual Protected V
Protected V
Linear Technology PCMCIA Product Family
VPP Switching Matrix
CC
CC
CC
U
5V/3.3V Switch Matrix
and VPP Switch Matrix
TM
output of the LTC1472 is switched
CC
current limiting and thermal shut-
5V/3.3V Switch Matrix
LTC1472
CC
PACKAGE
8-Pin SO
16-Pin SO*
14-Pin SO
24-Pin SSOP
8-Pin SO
16-Pin SO*
16-Pin SO*
and
1472fa
1

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LTC1472CS Summary of contents

Page 1

... VPP power. The LTC1472 is available in 16-pin SO package. , LTC and LT are registered trademarks of Linear Technology Corporation. SafeSlot is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. ...

Page 2

... From 3. 100Ω 1µF (Note 6) LOAD LOAD From 100Ω 1µF (Note 6) LOAD LOAD U W INFORMATION ORDER PART TOP VIEW NUMBER 16 V CC(OUT LTC1472CS GND 12 V CC(IN) 11 VPP OUT 10 GND PACKAGE = 100°C, θ = 100°C/W JA http://www.linear.com/leadfree/ ...

Page 3

ELECTRICAL CHARACTERISTICS (VPP Switch Section) The ● denotes specifications which apply over the full operating temperature range, otherwise specifications are 25° 5V 5V, VPP A DD CC(IN) SYMBOL PARAMETER V V Input Voltage ...

Page 4

LTC1472 W U TYPICAL PERFORMANCE CHARACTERISTICS 5V Supply Current (OFF 25° CC(OUT) PROGRAMMED TO OFF – SUPPLY VOLTAGE (V) IN LTC1472 TPC01 ...

Page 5

W U TYPICAL PERFORMANCE CHARACTERISTICS V Supply Current (No Load) CC(IN) 100 T = 25° VPP PROGRAMMED OUT TO VPP CC(IN VPP PROGRAMMED OUT Hi-Z – ...

Page 6

LTC1472 PIN FUNCTIONS Enable Input (Pins 3,4,7,8) The two V and two VPP Enable inputs are designed to CC interface directly with industry standard PCMCIA control- lers. They are high impedance CMOS gates with ESD protection diodes ...

Page 7

W BLOCK DIAGRAM TTL-TO-CMOS V EN0 CC CONVERTER TTL-TO-CMOS V EN1 CC CONVERTER V DD SHDN TTL-TO-CMOS VPP EN0 CONVERTER TTL-TO-CMOS VPP EN1 CONVERTER VPP IN + – 10V U OPERATION The LTC1472 protected switch matrix is designed to be ...

Page 8

LTC1472 U OPERATION V XOR Input Circuitry CC The LTC1472 ensures that the 3.3V and 5V switches are never turned on at the same time by employing an XOR function which locks out the 3.3V switch when the 5V switch ...

Page 9

U OPERATION VPP Gate Charge and Discharge Control The VPP switches are designed to ramp slowly (typically tens of µs) between output modes to reduce supply glitching when powering large capacitive loads. VPP Switch Protection Both VPP power switches are ...

Page 10

LTC1472 U U APPLICATIONS INFORMATION Interfacing to “365” Type Controllers The LTC1472 also interfaces directly with “365” type controllers as shown in Figure 2. The V are connected differently than to the CL-PD6710 control- ler because the “365” type controllers ...

Page 11

U U APPLICATIONS INFORMATION Output Capacitors The V pin is designed to ramp on slowly, typically CC(OUT) 400µs rise time. Therefore, capacitors as large as 150µF can be driven without producing voltage spikes on the supply pins ...

Page 12

LTC1472 U TYPICAL APPLICATIONS 3. 3.3V 5V A_VPP_PGM A_VPP_V CC A_V _3 CC A_V _5 CC 3.3V CL-PD6720 5V B_VPP_PGM B_VPP_V CC B_V _3 CC B_V _5 CC *FOR 5V TO 12V CONVERSION USE 10µH, COILCRAFT DO1608-103. ...

Page 13

U TYPICAL APPLICATIONS 3. 100µF 10V 3.3V 0.1µF 5V 0.1µF CL-PD6710 VPP_PGM VPP_V *FOR 5V TO 12V CONVERSION USE 10µH, COILCRAFT D01608-103. SEE LT1301 DATA SHEET FOR MORE DETAILED INFORMATION ...

Page 14

LTC1472 U TYPICAL APPLICATIONS Using the LT1121 Powered from an Auxiliary Winding for 12V VPP Power *13V TO 20V (MAY BE FROM AUXILIARY + WINDING) 10µF 10V 5V 2N7002 3.3V 0.1µF 5V 0.1µF CL-PD6710 VPP_PGM VPP_V ...

Page 15

... 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 circuits as described herein will not infringe on existing patent rights. Dual Protected PCMCIA Power Management System Powered by System 12V Supply 0.1µ ...

Page 16

... IN OUT Q = 2.5V to 5.5V 0.8V 60µA IN OUT Q = 2.5V to 5.5V 0.8V 60µA IN OUT Q = 2.25V to 5.5V 280µA IN OUT REF 5.5V to 60V 1.20V 2.5mA IN OUT Q = 2.5V to 5.5V 2.5V 25µA IN OUT Q LT/LT 0705 REV A • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 1995 1472fa ...

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