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)
MAX1602
__________Simplified Block Diagram
12IN
VPP
________________________Applications
Data Loggers
Handy-Terminals
Docking Stations
PCMCIA Read/Write Drives
CONTROL
INPUTS
VX
VY
VY
MAX1602
VCC
VCC
VCC
VCC
VDD
DECODE
LOGIC
CODE
SELECT
OVERCURRENT
AND
THERMAL
SHUTDOWN
FAULT
CODE
______________Ordering Information
PART
MAX1602EEE
TEMP. RANGE
-40°C to +85°C
PIN-PACKAGE
16 QSOP
GND
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
Single-Channel CardBus and PCMCIA VCC/VPP
Power-Switching Network
MAX1602
ABSOLUTE MAXIMUM RATINGS
Inputs/Outputs to GND
(VX, VY, VCC) (Note 1) ..........................................-0.3V, +6V
VPP Input/Output to GND
(12IN, VPP) (Note 1) ............................................-0.3V, +15V
Logic Inputs to GND (A0VCC, A1VCC,
A0VPP, A1VPP) (Note 1)........................................-0.3V, +6V
CODE Input to GND ........................................-0.3V, (VY + 0.3V)
VCC Output Current (Note 2)...................................................4A
VPP Output Current (Note 2).............................................260mA
VCC Short Circuit to GND ..........................................Continuous
VPP Short Circuit to GND ...........................................Continuous
Continuous Power Dissipation (T
A
= +70°C)
QSOP (derate 8.3mW/°C above +70°C) ....................667mW
Operating Temperature Range
MAX1602EEE .................................................-40°C to +85°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C
Note 1:
There are no parasitic diodes between any of these pins, so there are no power-up sequencing restrictions (for example,
logic input signals can be applied even if all of the supply voltage inputs are grounded).
Note 2:
VCC and VPP outputs are internally current limited. See the
Electrical Characteristics.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VY = 3.3V, VX = 5V, 12IN = 12V, T
A
= 0°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
POWER-SUPPLY SECTION
Input Voltage Range
VX, VY
12IN
VY falling edge
12IN falling edge
12IN rising edge
VX falling edge
VY Standby Supply Current
VX Standby Supply Current
12IN Standby Supply Current
VY Quiescent Supply Current
VX Quiescent Supply Current
12IN Quiescent Supply Current
VCC SWITCHES
Operating Output Current Range
On-Resistance, VY Switches
On-Resistance, VX Switches
Output Current Limit
VCC, VX = VY = 3V to 5.5V
12IN = 0V to 13V, VY = 3V, VX = 0V to 5.5V,
I
SWITCH
= 1A, T
A
= +25°C
12IN = 0V to 13V, VX = 4.5V, VY = 0V to 5.5V,
I
SWITCH
= 1A, T
A
= +25°C
VCC
1.2
0
0.09
0.09
1
0.25
0.25
4
A
Ω
Ω
A
All switches 0V or high-Z,
control inputs = 0V or VY, T
A
= +25°C
VX all switches 0V or high-Z,
control inputs = 0V or VY, T
A
= +25°C
All switches 0V or high-Z,
control inputs = 0V or VY, T
A
= +25°C
Any combination of VY switches on,
control inputs = 0V or VY, no VCC loads
Control inputs = 0V or VY, no VCC loads
VPP 12V switches on,
control inputs = 0V or VY, no VPP loads
20
10
5
3.0
11
2.4
1.8
5.0
1.4
5.5
13
2.8
10.0
2.8
11
1
1
200
50
100
µA
µA
µA
µA
µA
µA
V
CONDITIONS
MIN
TYP
MAX
UNITS
2.6
3.0
8.0
1.9
3
Undervoltage Lockout Threshold
V
2
_______________________________________________________________________________________
Single-Channel CardBus and PCMCIA VCC/VPP
Power-Switching Network
ELECTRICAL CHARACTERISTICS (continued)
(VY = 3.3V, VX = 5V, 12IN = 12V, T
A
= 0°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER
Output Sink Current
Output Leakage Current
Output Propagation Delay
Plus Rise Time
Output Rise Time
Output Propagation Delay
Plus Fall Time
Output Fall Time
VPP SWITCHES
Operating Output Current Range
On-Resistance, 12V Switches
On-Resistance, VPP = VCC Switches
Output Current Limit
Output Sink Current
Output Leakage Current
Output Propagation Delay
Plus Rise Time
Output Rise Time
Output Propagation Delay
Plus Fall Time
Output Fall Time
INTERFACE AND LOGIC SECTION
FAULT
Signal Propagation Delay
FAULT
Output Low Voltage
FAULT
Output Leakage Current
Thermal Shutdown Threshold
Logic Input Low Voltage
Logic Input High Voltage
Code Input Low Voltage
Code Input High Voltage
Code Input Mid-Level Voltage
Logic Input Bias Current
VCC or VPP, load step to
FAULT
output,
50% point to 50% point (Note 3)
I
SINK
= 1mA, low state
V
FAULT
= 5.5V, high state
Hysteresis = 20°C (Note 4)
__VCC, __VPP
__VCC, __VPP
“Intel” code
“Cirrus” code
“Databook” code
__VCC, __VPP, code
1.5
0
VY - 0.4
1.2
-1
0.4
VY
VY - 1.2
1
-0.5
150
0.6
1
0.4
0.5
µs
V
µA
°C
V
V
V
V
V
µA
VPP
12IN = 11.6V, I
SWITCH
= 100mA, T
A
= +25°C
Programmed to VX (5V) or VY (3.3V), T
A
= +25°C
VPP programmed to 12V
VPP < 0.4V, programmed to 0V state
VPP forced to 0V, high-Z state, T
A
= +25°C
VPP, 0V to 12IN, C
L
= 0.1µF,
50% of input to 90% of output, T
A
= +25°C
VPP, 0V to 12IN, C
L
= 0.1µF,
10% to 90% points, T
A
= +25°C
VPP, 12IN to 0V, C
L
= 0.1µF,
50% of input to 10% of output, T
A
= +25°C
VPP, 12IN to 0V, C
L
= 0.1µF, R
L
= 100Ω
90% to 10% points
100
130
10
0.1
1.2
600
9
6
60
10
30
0
0.70
3
200
120
1
6
260
mA
Ω
Ω
mA
mA
µA
ms
µs
ms
ms
CONDITIONS
VCC < 0.4V, programmed to 0V state
VCC forced to 0V, high-Z state, T
A
= +25°C
VCC, 0V to VX or VY, C
L
= 30µF, R
L
= 25Ω,
50% of input to 90% of output, T
A
= +25°C
VCC, 0V to VX or VY, C
L
= 1µF, R
L
= open circuit,
10% to 90% points, T
A
= +25°C
VCC, VX or VY to 0V, C
L
= 30µF, R
L
= open circuit,
50% of input to 10% of output, T
A
= +25°C
VCC, VX or VY to 0V, C
L
= 1µF, R
L
= 25Ω,
90% to 10% points
100
MIN
10
1
2
1200
90
6
150
10
10
TYP
MAX
UNITS
mA
µA
ms
µs
ms
ms
MAX1602
3
_______________________________________________________________________________________
Single-Channel CardBus and PCMCIA VCC/VPP
Power-Switching Network
MAX1602
ELECTRICAL CHARACTERISTICS
(VY = 3.3V, VX = 5V, 12IN = 12V, T
A
= -40°C to +85°C, unless otherwise noted.)
PARAMETER
POWER-SUPPLY SECTION
Input Voltage Range
VX, VY
12IN
VY falling edge, hysteresis = 1%
12IN falling edge
12IN rising edge
VX, VY falling edge
VY Standby Supply Current
VX Standby Supply Current
12IN Standby Supply Current
VY Quiescent Supply Current
VX Quiescent Supply Current
12IN Quiescent Supply Current
FAULT
Output Low Voltage
Logic Input Low Voltage
Logic Input High Voltage
All switches 0V or high-Z, control inputs = 0V or VY
VX, all switches 0V or high-Z,
control inputs = 0V or VY, T
A
= T
MIN
to T
MAX
All switches 0V or high-Z, control inputs = 0V or VY
Any combination of VY switches on,
control inputs = 0V or VY, no VCC loads
Any combination of VX switches on,
control inputs = 0V or high-Z, no VCC loads
12V switches on, control inputs = 0V or VY, no VPP loads
I
SINK
= 1mA, low state
__VCC, __VPP
__VCC, __VPP
1.6
3.0
11
2.3
1.8
5
1.4
10
2.9
30
15
15
200
50
100
0.4
0.6
µA
µA
µA
µA
µA
µA
V
V
V
5.5
13
2.9
V
CONDITIONS
MIN
TYP
MAX
UNITS
Undervoltage Lockout Threshold
V
Note 3:
Not production tested.
Note 4:
Thermal limit not active in standby state (all switches programmed to GND or high-Z state).
4
_______________________________________________________________________________________
Single-Channel CardBus and PCMCIA VCC/VPP
Power-Switching Network
__________________________________________Typical Operating Characteristics
(VY = 3.3V, VX = 5V, 12IN = 12V, T
A
= +25°C, unless otherwise noted.)
VCC SWITCHING (RISE)
MAX1602 TOC-01
MAX1602
VCC SWITCHING (RISE)
3
VCC
(V)
2
1
0
CONTROL 5
INPUT
0
(V)
MAX1602 TOC-02
6
VCC
(V)
4
2
0
CONTROL
INPUT 5
(V)
0
500µs/div
C
L
= 30µF, R
L
= 25Ω
C
L
= 1µF, R
L
=
∞
500µs/div
VCC SWITCHING (FALL)
MAX1602 TOC-03
VCC SWITCHING (FALL)
6
VCC
(V)
4
2
0
CONTROL 5
INPUT
0
(V)
MAX1602 TOC-04
6
VCC
(V)
4
2
0
CONTROL 5
INPUT
0
(V)
C
L
= 33µF, R
L
=
∞
10ms/div
C
L
= 1µF, R
L
= 25
Ω
20ms/div
VPP SWITCHING (RISE)
MAX1602 TOC-05
VPP SWITCHING (FALL)
15
10
VPP
(V)
5
0
CONTROL 5
INPUT
0
(V)
MAX1602 TOC-06
15
10
VPP
(V)
5
0
CONTROL 5
INPUT
0
(V)
C
L
= 0.1µF, R
L
=
∞
200µs/div
C
L
= 0.1µF, R
L
=
∞
2ms/div
_______________________________________________________________________________________
5
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