Single-Channel CardBus and PCMCIA VCC/VPP

Power-Switching Network

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Maxim Integrated Products

1

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800

19-1125; Rev 0; 9/96

PART

MAX1602EEE

-40°C to +85°C

TEMP. RANGE

PIN-PACKAGE

16 QSOP

_______________General Description

The MAX1602 DC power-switching IC contains a net-

work of low-resistance MOSFET switches that deliver

selectable VCC and VPP voltages to a single CardBus

or PC Card host socket. Key features include low-

resistance switches, small packaging, soft-switching

action, and compliance with PCMCIA specifications for

3V/5V switching. 3.3V-only power switching for fast,

32-bit CardBus applications is supported in two ways:

low-resistance 3.3V switches allow high 3.3V load cur-

rents (up to 1A); and completely independent internal

charge pumps let the 3.3V switch operate normally,

even if the +5V and +12V supplies are disconnected or

turned off to conserve power. The internal charge

pumps are regulating types that draw reduced input

current when the VCC switches are static. Power con-

sumption is automatically reduced to 11µA max when

the outputs are high-Z or GND.

Other key features include guaranteed specifications

for output current limit level, and guaranteed specifi-

cations for output rise/fall times (in compliance with

PCMCIA specifications). Reliability is enhanced by

thermal-overload protection, accurate current limiting,

an overcurrent-fault flag output, and undervoltage lock-

outs. The CMOS/TTL-logic interface is flexible, and can

tolerate logic input levels in excess of the positive sup-

ply rail.

The MAX1602 fits a complete CardBus/PCMCIA switch

into a space-saving, 16-pin QSOP package.

________________________Applications

Data Loggers

Handy-Terminals

Docking Stations

PCMCIA Read/Write Drives

____________________________Features

o Supports a Single PC Card/CardBus Socket

o 1A, 0.25

Ω Max 3.3V VCC Switch

1A, 0.25

Ω Max 5V VCC Switch

o Soft Switching for Low Inrush Surge Current

o Overcurrent Protection

o Overcurrent/Thermal-Fault Flag Output

o Independent Internal Charge Pumps

o Break-Before-Make Switching Action

o 11µA Max Standby Supply Current

3.3V Switching

o Complies with PCMCIA 3V/5V Switching

Specifications

o Super-Small 16-Pin QSOP Package

o Code Compatible with:

Cirrus CL-PD67XX Family

Databook DB86184

Intel 82365SL (industry-standard coding)

DECODE

LOGIC

VX

12IN

VY

VY

OVERCURRENT

AND

THERMAL

SHUTDOWN

MAX1602

VDD

CODE

SELECT

GND

VPP

VCC

VCC

VCC

VCC

FAULT

CODE

CONTROL

INPUTS

__________Simplified Block Diagram

______________Ordering Information

Pin Configuration appears on last page.