19-4752; Rev 3; 5/98
Dual-Channel CardBus and PCMCIA VCC/VPP
Power-Switching Networks
Other key features include guaranteed specifications
for output current limit level, and guaranteed specifications 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 lockout. The CMOS/TTL-logic interface is flexible, and can
tolerate logic input levels in excess of the positive supply rail.
The MAX1600 and MAX1603 are identical, except for
the MAX1603’s VY switch on-resistance (typically
140mΩ). The MAX1600/MAX1603 fit two complete
CardBus/ PCMCIA switches into a space-saving, narrow
(0.2in. or 5mm wide) SSOP package.
____________________________Features
o Supports Two PC Card/CardBus Sockets
o 1A, 0.08Ω Max 3.3V VCC Switch (MAX1600 only)
1A, 0.14Ω 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 Tj = +150°C
o Independent Internal Charge Pumps
o Break-Before-Make Switching Action
o 10µA Max Standby Supply Current
o 5V and 12V Not Required for Low-RDS(ON)
3.3V Switching
o Complies with PCMCIA 3V/5V Switching
Specifications
o Super-Small 28-Pin SSOP Package
(0.2in. or 5mm wide)
o Code Compatible with:
Cirrus CL-PD67XX Family
Databook DB86184
Intel 82365SL (industry-standard coding)
Simplified Block Diagram
VPPA
12IN
MAX1600/MAX1603
VY
VCCA
VY
VX
________________________Applications
Desktop Computers
Data Loggers
Notebook Computers
Docking Stations
Handy-Terminals
PCMCIA Read/Write Drives
Ordering Information
PART
TEMP. RANGE
PIN-PACKAGE
MAX1600EAI
-40°C to +85°C
28 SSOP
MAX1603EAI
-40°C to +85°C
VCCA
VX
VL
VCCA
VDD
DECODE
LOGIC
CONTROL
INPUTS
CODE
SELECT
GND
OVERCURRENT
AND
THERMAL
SHUTDOWN
FAULT
CODE
VPPB
12IN
28 SSOP
VY
VCCB
VCCB
VX
VCCB
Pin Configuration appears on last page.
________________________________________________________________ Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.
MAX1600/MAX1603
General Description
The MAX1600/MAX1603 DC power-switching ICs contain a network of low-resistance MOSFET switches that
deliver selectable VCC and VPP voltages to two
CardBus or PC Card host sockets. Key features include
ultra-low-resistance switches, small packaging, softswitching 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: stiff, low-resistance 3.3V switches allow high 3.3V
load currents (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. Also,
power consumption is automatically reduced to 10µA
max when the control logic inputs are programmed to
high-Z or GND states, unlike other solutions that may
require a separate shutdown-control input.
