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LTC1470/LTC1471

Single and Dual

PCMCIA Protected

FEATURES

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Single 3.3V/5V Switch in 8-Pin SO Package

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Dual 3.3V/5V Switch in 16-Pin SO Package

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Built-In Current Limit and Thermal Shutdown

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Built-In Charge Pumps (No 12V Required)

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Output Current Capability: 1A

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Inrush Current Limited (Drives 150

µF Loads)

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Quiescent Current in Standby: 1

µA

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No Parasitic Body Diodes

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Built-In XOR Function Eliminates “Glue” Logic

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Break-Before-Make Switching

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Controlled Rise and Fall Times

LTC1471

AEN1

AEN0

BEN1

BEN0

BOUT

AOUT

PCMCIA

CARD SLOT

CONTROLLER

GND

0.1

µF

5V

3.3V

0.1

µF

1470/71 TA01

PCMCIA

CARD SLOT

+

1

µF

10k

(Hi-Z/3.3V/5V)

PCMCIA

CARD SLOT

+

1

µF

10k

(Hi-Z/3.3V/5V)

The LTC

puter Memory Card International Association (PCMCIA)

card slot between three operating states: OFF, 3.3V and

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.

The LTC1470 inputs are compatible with industry stan-

dard PCMCIA controllers. A built-in XOR ensures that both

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 SafeSlot

thermal shutdown. The output is limited to 1A during short

circuit to ground but 2A of peak operating current is

allowed.

The LTC1471 is a dual version of the LTC1470 and is

available in a 16-pin SO package.

SafeSlot is a trademark of Linear Technology Corporation.

Linear Technology PCMCIA Product Family

, LTC and LT are registered trademarks of Linear Technology Corporation.

DEVICE

DESCRIPTION

PACKAGE

LT

Single PCMCIA VPP Driver/Regulator

8-Pin SO

LT1313

Dual PCMCIA VPP Driver/Regulator

16-Pin SO*

LTC1314

Single PCMCIA Switch Matrix

14-Pin SO

LTC1315

Dual PCMCIA Switch Matrix

24-Pin SSOP

LTC1470

8-Pin SO

LTC1471

16-Pin SO*

LTC1472

16-Pin SO*

*Narrow Body

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Notebook Computers

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Palmtop Computers

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Pen-Based Computers

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Handi-Terminals

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PC Card Reader/Writers

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3.3V/5V Power Supply Switch