Maxim MAX1601EAI, MAX1604EAI Datasheet

19-1085; Rev 1; 10/96

Dual-Channel CardBus and PCMCIA

Power Switches with SMBus™ Serial Interface

________________General Description

The MAX1601/MAX1604 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 switches are programmed to high-Z or
GND states over the serial interface, unlike other solu­tions that may require a separate shutdown-control
input.

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, undervoltage lockout, and extra
ESD protection at the VCC/VPP outputs. The SMBus ser­ial interface is flexible, and can tolerate logic input levels
in excess of the positive supply rail.

The MAX1604 and MAX1601 are identical, except
for the MAX1604’s VY switch, which has roughly three­times the on-resistance (typically 140mΩ).The
MAX1601/MAX1604 fit two complete CardBus/PCMCIA
switches into a space-saving, narrow (0.2in. or 5mm
wide) SSOP package.

________________________Applications

Desktop Computers Data Loggers
Notebook Computers Digital Cameras
Docking Stations Printers
Handy-Terminals PCMCIA Read/Write Drives

____________________________Features

♦ Supports Two CardBus Sockets
♦ 1A, 0.08Ω Max VY VCC Switch (MAX1601 only)

1A, 0.14Ω Max VX VCC Switch

♦ Soft Switching for Low Inrush Surge Current
♦ Overcurrent Protection
♦ Overcurrent/Thermal-Fault Flag Output
♦ Thermal Shutdown at T

= +150°C

j

♦ Independent Internal Charge Pumps
♦ Break-Before-Make Switching Action
♦ 10µA Max Standby Supply Current
♦ 5V and 12V Not Required for Low-R

DS(ON)

3.3V

Switching

♦ Complies with PCMCIA 3V/5V Switching

Specifications

♦ Super-Small, 28-Pin SSOP Package

(0.2in. or 5mm wide)

♦ System Management Bus (SMBus) Serial

Interface

_______________Ordering Information

PART

MAX1601EAI
MAX1604EAI

TEMP. RANGE PIN-PACKAGE

-40°C to +85°C

-40°C to +85°C

28 SSOP
28 SSOP

__________Simplified Block Diagram

12IN

SMBCLK

SMBDATA

SMBSUS

GND

12IN

VY
VY

VX
VX

VL

MAX1601/MAX1604

VDD

DECODE

LOGIC

ADDRESS

SELECT

OVERCURRENT

AND 

THERMAL

SHUTDOWN

VPPA

VCCA
VCCA

VCCA

SMBALERT

ADR
VPPB

MAX1601/MAX1604

Pin Configuration appears on last page.

SMBus is a trademark of Intel Corp.

________________________________________________________________

VY

VX

Maxim Integrated Products

VCCB
VCCB
VCCB

1

For free samples & the latest literature: http://www.maxim-ic.com, or phone [phone]

Dual-Channel CardBus and PCMCIA
Power Switches with SMBus™ Serial Interface

ABSOLUTE MAXIMUM RATINGS

Inputs/Outputs to GND

(VL, VX, VY, VCCA, VCCB) (Note 1)........................-0.3V, +6V

VPP Inputs/Outputs to GND

(12INA, 12INB, VPPA, VPPB) (Note 1)..................-0.3V, +15V

Inputs and Outputs to GND (SMBCLK, SMBDATA,

SMBSUS, SMBALERT) (Note 1)..............................-0.3V, +6V

ADR Input to GND ...........................................-0.3V, (VL + 0.3V)

VCCA, VCCB Output Current (Note 2).....................................4A

VPPA, VPPB Output Current (Note 2)...............................250mA

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 to safe values. See the

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

MAX1601/MAX1604

(VL = VY = 3.3V, VX = 5V, 12INA = 12INB = 12V, TA= 0°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.)

CONDITIONS

POWER-SUPPLY SECTION

Input Voltage Range

Undervoltage Lockout Threshold

VCC SWITCHES

On-Resistance, VY Switches

VX, VY or VL
12INA, 12INB
VL falling edge
12IN falling edge
12IN rising edge
VX, VY falling edge

VX or VY, all switches 0V or high-Z,
control inputs = 0V or VL, TA= +25°C

Any combination of VY switches on,
control inputs = 0V or VL, no VCC loads

Any combination of VX switches on,
control inputs = 0V or high-Z, no VCC loads

12INA tied to 12INB, all switches 0V or high-Z,
control inputs = 0V or VL, TA= +25°C

12INA tied to 12INB, VPPA and VPPB 12V switches on,
control inputs = 0V or VL, no VPP loads

All switches 0V or high-Z, control inputs = 0V or VL,
TA= +25°C

Any combination of switches on
When using VL as shutdown pin (Note 3)

VCCA or VCCB, VX = VY = 3V to 5.5V
12INA = 12INB = 0V to 13V,

VY = 3V, VX = 0V to 5.5V,
I

12INA = 12INB = 0V to 13V, VX = 4.5V, VY = 0V to 5.5V,
I

SWITCH

SWITCH

= 1A, TA= +25°C

= 1A, TA= +25°C

VCCA, VCCB Short Circuit to GND............................Continuous

VPPA, VPPB Short Circuit to GND..............................Continuous

Continuous Power Dissipation (T

SSOP (derate 9.52mW/°C above +70°C) ....................762mW

Operating Temperature Range

MAX1601EAI/MAX1604EAI .............................-40°C to +85°C

Storage Temperature Range.............................-65°C to +160°C

Lead Temperature (soldering, 10sec).............................+300°C

Electrical Characteristics

MAX1601
MAX1604

= +70°C)

A

table.

3.0 5.5
11 13

2.4 2.5 2.8

1.8 3.0

5810

1.4 2.5 2.8

1 µA12IN_ Standby Supply Current

0.06 0.08

0.14 0.24

UNITSMIN TYP MAXPARAMETER

V

V

µA1Standby Supply Current

µA20 100VY Quiescent Supply Current

µA20 100VX Quiescent Supply Current

µA15 10012IN_ Quiescent Supply Current

µA410VL Standby Supply Current
µA25 150VL Quiescent Supply Current

V/µs0.05VL Fall Rate

A01Operating Output Current Range

Ω

Ω0.10 0.14On-Resistance, VX Switches

2 _______________________________________________________________________________________

Dual-Channel CardBus and PCMCIA

Power Switches with SMBus™ Serial Interface

ELECTRICAL CHARACTERISTICS (continued)

(VL = VY = 3.3V, VX = 5V, 12INA = 12INB = 12V, TA= 0°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.)

Output Propagation Delay
Plus Rise Time

Output Propagation Delay
Plus Fall Time

VPP SWITCHES

Output Propagation Delay
Plus Rise Time

Output Propagation Delay
Plus Fall Time

INTERFACE AND LOGIC SECTION

SMBALERT Signal Propagation
Delay

SMBALERT Output Low Voltage
SMBALERT Output Leakage Current

CONDITIONS

VCCA or VCCB A1.2 4.0Output Current Limit
VCCA or VCCB < 0.4V, programmed to 0V state mA20Output Sink Current

VCCA or VCCB forced to 0V, high-Z state,
TA= +25°C

VCCA or VCCB, 0V to VX or VY, CL= 30µF,
RL= 25Ω, 50% of input to 90% of output, TA= +25°C

VCCA or VCCB, 0V to VX or VY, CL= 1µF,
RL= open circuit, 10% to 90% points, TA= +25°C

VCCA or VCCB, VX or VY to 0V, CL= 30µF,
RL= open circuit, 50% of input to 10% of output,
TA= +25°C

VCCA or VCCB, VX or VY to 0V, CL= 1µF,
RL= 25Ω, 90% to 10% points

VPPA or VPPB
12IN = 11.6V, I
Programmed to VX (5V) or VY (3.3V), TA= +25°C
VPPA or VPPB, programmed to 12V
VPPA or VPPB < 0.4V, programmed to 0V state

VPPA or VPPB forced to 0V, high-Z state,
TA= +25°C

VPPA or VPPB, 0V to 12IN_, CL= 0.1µF,
50% of input to 90% of output, TA= +25°C

VPPA or VPPB, 0V to 12IN_, CL= 0.1µF,
10% to 90% points, TA= +25°C

VPPA or VPPB, 12IN_ to 0V, CL= 0.1µF,
50% of input to 10% of output, TA= +25°C

VPPA or VPPB, 12IN_ to 0V, CL= 0.1µF,
90% to 10% points

VCC_ or VPP_, load step to SMBALERT output,
50% point to 50% point (Note 3)

I

= 1mA, low state

SINK

V

SMBALERT

Hysteresis = +20°C (Note 4)

SMBSUS, SMBCLK, SMBDATA
SMBSUS, SMBCLK, SMBDATA

SMBDATA, I

= 5.5V, high state

SINK

= 100mA, TA= +25°C

SWITCH

= 4mA

100 800Output Rise Time

2.2

UNITSMIN TYP MAXPARAMETER

MAX1601/MAX1604

µA10Output Leakage Current

ms210

µs100 1200Output Rise Time

ms60 100

ms6Output Fall Time

mA0 120Operating Output Current Range

Ω0.70 1On-Resistance, 12V Switches
Ω13On-Resistance, VPP = VCC Switches

mA130 200 260Output Current Limit
mA10Output Sink Current

µA10Output Leakage Current

ms1.2 30

µs

ms960

ms1Output Fall Time

µs3

V0.4

µA-0.1 0.1
°C150Thermal Shutdown Threshold

V0.8Logic Input Low Voltage
VLogic Input High Voltage

V0.4Logic Output Low Voltage

_______________________________________________________________________________________ 3

Dual-Channel CardBus and PCMCIA
Power Switches with SMBus™ Serial Interface

ELECTRICAL CHARACTERISTICS (continued)

(VL = VY = 3.3V, VX = 5V, 12INA = 12INB = 12V, TA= 0°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.)

PARAMETER MIN TYP MAX UNITS

SMB Input Capacitance 5 pF
SMBCLK Clock Frequency DC 100 kHz
SMBCLK Clock Low Time 4.7 µs
SMBCLK Clock High Time 4 µst

SMB Repeated Start-Condition
Setup Time

SMB Start-Condition Hold Time 4 µs
SMB Stop-Condition Setup Time 4 µs

SMB Data Valid to SMBCLK Rising­Edge Time

SMB Data Hold Time 0
Bus Free Time 4.7 µs

MAX1601/MAX1604

ADR Input Low Voltage 0.6 V
ADR Input High Voltage 1.5 V
Logic Input Bias Current -1 1 µA

SCL Fall to SDA Valid
(Master Clocking-In Data)

Start-Condition Setup

SMBSUS, SMBCLK, SMBDATA
SMBus spec = 10kHz min
t

10% to 10% points

LOW

90% to 90% points

HIGH

t

90% to 90% points

SU:STA

t
t

t
10% of SMBCLK

t
t

ADR, SMBSUS, SMBCLK, SMBDATA

10% of SMBDATA to 90% of SMBCLK

HD:STA

90% of SMBCLK to 10% of SMBDATA

SU:STO

10% or 90% of SMBDATA to

SU:DAT

(Note 5)

HD:DAT

between start and stop conditions

BUF

CONDITIONS

250 ns

500 ns

100 1000 ns

4.7 µs

ns

Note 3: Not production tested.
Note 4: Thermal limit not active in standby state (all switches programmed to GND or high-Z state).
Note 5: A transition must internally provide at least a hold time in order to bridge the undefined region (300ns max) of the falling

edge of SMBCLK.

4 _______________________________________________________________________________________

Dual-Channel CardBus and PCMCIA

Power Switches with SMBus™ Serial Interface

ELECTRICAL CHARACTERISTICS

(VL = VY = 3.3V, VX = 5V, 12INA = 12INB = 12V, TA= -40°C to +85°C, unless otherwise noted.)

CONDITIONS

POWER-SUPPLY SECTION

Input Voltage Range

Undervoltage Lockout Threshold

VX Quiescent Supply Current

INTERFACE AND LOGIC SECTION

SMBALERT Output Low Voltage

Logic Input High Voltage
Logic Output Low Voltage
ADR Input Low Voltage
ADR Input High Voltage

VX, VY or VL
12INA, 12INB
VL falling edge, hysteresis = 1%
12IN falling edge
12IN rising edge
VX, VY falling edge

VX or VY, all switches 0V or high-Z,
control inputs = 0V or VL

Any combination of VY switches on,
control inputs = 0V or VL, no VCC loads

Any combination of VX switches on,
control inputs = 0V or high-Z, no VCC loads

12INA tied to 12INB, all switches 0V or high-Z,
control inputs = 0V or VL

12INA tied to 12INB, VPPA and VPPB 12V switches on,
control inputs = 0V or VL, no VPP loads

All switches 0V or high-Z, control inputs = 0V or VL
Any combination of switches on

I

= 1mA, low state

SINK

SMBCLK, SMBDATA, SMBSUS
SMBCLK, SMBDATA, SMBSUS
SMBDATA, I

SINK

= 4mA

UNITSMIN TYP MAXPARAMETER

3.0 5.5
11 13

2.3 2.9

1.8

510

1.4 2.9

15

2.2

0.4

0.6

1.5

V

V

µA15Standby Supply Current

µA100VY Quiescent Supply Current

µA100

µA12IN_ Standby Supply Current

µA10012IN_ Quiescent Supply Current

µA15VL Standby Supply Current
µA150VL Quiescent Supply Current

V0.4
V0.8Logic Input Low Voltage

V
V
V
V

MAX1601/MAX1604

_______________________________________________________________________________________ 5