MAX1602 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – Single-Channel CardBus and PCMCIA VCC/VPP Power-Switching Network

19-1125; Rev 0; 9/96
Single-Channel CardBus and PCMCIA VCC/VPP
Power-Switching Network
_______________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.
____________________________Features
o Supports a Single PC Card/CardBus Socket
o 1A, 0.25Ω Max 3.3V VCC Switch
1A, 0.25Ω Max 5V VCC Switch
o Soft Switching for Low Inrush Surge Current
o Overcurrent Protection
o Overcurrent/Thermal-Fault Flag Output
o Thermal Shutdown at T_j = +150°C
o Independent Internal Charge Pumps
o Break-Before-Make Switching Action
o 11µA Max Standby Supply Current
o 5V and 12V Not Required for Low-R_DS(ON)
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)
__________Simplified Block Diagram
________________________Applications
Data Loggers
Handy-Terminals
Docking Stations
PCMCIA Read/Write Drives
______________Ordering Information
PART
MAX1602EEE
TEMP. RANGE
-40°C to +85°C
PIN-PACKAGE
16 QSOP
Pin Configuration appears on last page.
12IN
VX
VY
VY
CONTROL
INPUTS
GND
MAX1602
VDD
DECODE
LOGIC
CODE
SELECT
OVERCURRENT
AND
THERMAL
SHUTDOWN
VPP
VCC
VCC
VCC
VCC
FAULT
CODE
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