Datasheet MAX1600EAI, MAX1603EAI Datasheet (Maxim)

MAX1600/MAX1603

Dual-Channel CardBus and PCMCIA VCC/VPP

Power-Switching Networks

________________________________________________________________

Maxim Integrated Products

1

For free samples & the latest literature: http://www.maxim-ic.com, or phone [phone].
For small orders, phone [phone] ext. 3468.

19-4752; Rev 3; 5/98

PART

MAX1600EAI
MAX1603EAI

-40°C to +85°C

-40°C to +85°C

TEMP. RANGE PIN-PACKAGE

28 SSOP
28 SSOP

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.

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.

________________________Applications

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

Ordering Information

____________________________Features

♦ Supports Two PC Card/CardBus Sockets
♦ 1A, 0.08Ω Max 3.3V VCC Switch (MAX1600 only)

1A, 0.14Ω Max 5V VCC Switch

♦ Soft Switching for Low Inrush Surge Current
♦ Overcurrent Protection
♦ Overcurrent/Thermal-Fault Flag Output
♦ Thermal Shutdown at Tj= +150°C
♦ 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)

♦ Code Compatible with:

Cirrus CL-PD67XX Family
Databook DB86184
Intel 82365SL (industry-standard coding)

DECODE

LOGIC

VY

12IN

VY
VX

VX

OVERCURRENT

AND

THERMAL

SHUTDOWN

MAX1600/MAX1603

VDD

CODE

SELECT

GND

12IN

VY

VX

VL

VPPA

VCCA
VCCA
VCCA

FAULT

CODE
VPPB

VCCB
VCCB
VCCB

CONTROL

INPUTS

Simplified Block Diagram

Pin Configuration appears on last page.

MAX1600/MAX1603

Dual-Channel CardBus and PCMCIA VCC/VPP
Power-Switching Networks

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(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.)

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.

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

Logic Inputs to GND (A0VCC, A1VCC, B0VCC, B1VCC,

A0VPP, A1VPP, B0VPP, B1VPP) (Note 1) ...............-0.3V, +6V

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

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

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

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

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

Continuous Power Dissipation (T

A

= +70°C)

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

Operating Temperature Range

MAX160_EAI/MAX1603EAI..............................-40°C to +85°C

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

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

2.4 2.5 2.8

V

11 13

Input Voltage Range

µA25 150VL Quiescent Supply Current

µA1Standby Supply Current

µA15 10012IN_ Quiescent Supply Current

µA4 10VL Standby Supply Current

UNITSMIN TYP MAXPARAMETER

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

1 µA12IN_ Standby Supply Current

3.0 5.5

Ω

0.06 0.08

A0 1Operating Output Current Range

Ω0.10 0.14On-Resistance, VX Switches

µA20 100VY Quiescent Supply Current

µA20 100VX Quiescent Supply Current

V/µs0.05VL Fall Rate

1.8 3.0
V

1.4 2.5 2.8

Undervoltage Lockout Threshold

5.0 8.0 10.0

VL falling edge

When using VL as shutdown pin (Note 3)

VX, VY or VL
12INA, 12INB

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

MAX1600

VCCA or VCCB, VX = VY = 3V to 5.5V

Any combination of switches on

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

CONDITIONS

12IN falling edge

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

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

SWITCH

= 1A, TA= +25°C

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

12IN rising edge
VX, VY falling edge

12INA = 12INB = 0V to 13V,
VY = 3V, VX = 0V to 5.5V,
I

SWITCH

= 1A, TA= +25°C

0.14 0.24

On-Resistance, VY Switches

MAX1603

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

A1.2 4Output Current Limit VCCA or VCCB

POWER-SUPPLY SECTION

VCC SWITCHES

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

.

MAX1600/MAX1603

Dual-Channel CardBus and PCMCIA VCC/VPP

Power-Switching Networks

_______________________________________________________________________________________ 3

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.)

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

Hysteresis = 20°C (Note 4)

V

FAULT

= 5.5V, high state

I

SINK

= 1mA, low state

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

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

VPPA or VPPB < 0.4V, programmed to 0V state

VPPA or VPPB, programmed to 12V

VPPA or VPPB
12IN = 11.6V, I

SWITCH

= 100mA, TA= +25°C

Programmed to VX (5V) or VY (3.3V), TA= +25°C

VPPA or VPPB, 0V to 12IN_, CL= 0.1µF,
50% of input to 90% of output, T

A

= +25°C

CONDITIONS

°C150Thermal Shutdown Threshold

µA-0.5 0.5

FAULT Output Leakage Current

V0.4

FAULT Output Low Voltage

µs1

FAULT Signal Propagation Delay

ms1.2 30

Output Propagation Delay
Plus Rise Time

ms2 10

Output Propagation Delay
Plus Rise Time

µA10Output Leakage Current

mA10Output Sink Current

mA130 200 260Output Current Limit

mA0 120Operating Output Current Range

Ω0.70 1On-Resistance, 12V Switches
Ω1 3On-Resistance, VPP = VCC Switches

UNITSMIN TYP MAXPARAMETER

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

ms60 100

Output Propagation Delay
Plus Fall Time

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

ms6Output Fall Time

“Databook” code

“Cirrus” code

“Intel” code

__VCC, __VPP

__VCC, __VPP

V1.2 VL - 1.2Code Input Mid-Level Voltage

VVL - 0.4 VLCode Input High Voltage

V0 0.4Code Input Low Voltage

V1.5Logic Input High Voltage

V0.6Logic Input Low Voltage

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

µs100 800Output Rise Time

__VCC, __VPP, code µA-1 1Logic Input Bias Current

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

µs100 1200Output Rise Time

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

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

ms1Output Fall Time

ms9 60

Output Propagation Delay
Plus Fall Time

VCCA or VCCB forced to 0V, high-Z state, TA= +25°C µA10Output Leakage Current

VCCA or VCCB < 0.4V, programmed to 0V state mA20Output Sink Current

VPP SWITCHES

INTERFACE AND LOGIC SECTION

MAX1600/MAX1603

Dual-Channel CardBus and PCMCIA VCC/VPP
Power-Switching Networks

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS

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

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

MIN

to T

MAX

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

All switches 0V or high-Z, control inputs = 0V or VL

V

3.0 5.5

0.6

µA100VY Quiescent Supply Current

VL falling edge, hysteresis = 1%

Logic Input Low Voltage __VCC, __VPP

VX, VY or VL

15

12INA, 12INB

µA12IN_ Standby Supply Current

1.8

µA100

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

VX Quiescent Supply Current

V

1.4 2.9

Undervoltage Lockout Threshold

5 10

Any combination of switches on

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

CONDITIONS

12IN falling edge

2.3 2.9

V

11 13

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

12IN rising edge

Input Voltage Range

VX, VY falling edge

µA150VL Quiescent Supply Current

µA15Standby Supply Current

µA10012IN_ Quiescent Supply Current
µA15VL Standby Supply Current

UNITSMIN TYP MAXPARAMETER

V1.6Logic Input High Voltage __VCC, __VPP

__________________________________________Typical Operating Characteristics

(VL = VY = 3.3V, VX = 5V = 12IN, TA = +25°C, unless otherwise noted.)

CL = 30µF, RL = 25Ω

VCC_ SWITCHING (RISE)

6
4
2

0
5
0

200µs/div

VCC_

(V)

CONTROL

INPUT

(V)

MAX1600/3 TOC-01

CL = 1µF, RL = ∞

VCC_ SWITCHING (RISE)

3
2
1

0
5
0

500µs/div

VCC_

(V)

CONTROL

INPUT

(V)

MAX1600/3 TOC-02

V0.4

FAULT Output Low Voltage

I

SINK

= 1mA, low state

POWER-SUPPLY SECTION

Note 3: Not production tested.
Note 4: Thermal limit not active in standby state (all switches programmed to GND or high-Z state).

MAX1600/MAX1603

Dual-Channel CardBus and PCMCIA VCC/VPP

Power-Switching Networks

_______________________________________________________________________________________

5

_____________________________Typical Operating Characteristics (continued)

(VL = VY = 3.3V, VX = 5V = 12IN, TA = +25°C, unless otherwise noted.)

CL = 33µF, RL = ∞

VCC_ SWITCHING (FALL)

6
4
2

0
5
0

10ms/div

VCC_

(V)

CONTROL

INPUT

(V)

MAX1600/3 TOC-03

CL = 0.1µF, RL = ∞

VPP_ SWITCHING (RISE)

15
10

5
0

5
0

200µs/div

VPP_

(V)

CONTROL

INPUT

(V)

MAX1600/3 TOC-05

CL = 1µF, RL = 25

Ω

VCC_ SWITCHING (FALL)

6
4
2

0
5
0

10ms/div

VCC_

(V)

CONTROL

INPUT

(V)

MAX1600/3 TOC-04

VPP_ SWITCHING (FALL)

15
10

5
0

5
0

2ms/div

VPP_

(V)

CONTROL

INPUT

(V)

MAX1600/3 TOC-06

CL = 0.1µF, RL = ∞

CL = 1µF, RESISTIVE OVERLOAD, RL = 1Ω

VCC_ CURRENT LIMITING

4
2
0

2ms/div

VCC_

(V)

MAX1600/3 TOC-08

INPUT CURRENT (VCC OUTPUT SHORTED)

1.5

2.0

1.0

0.5
0

1ms/div

I

VY

(A)

MAX1600/3 TOC-09

MAX1600/MAX1603

Dual-Channel CardBus and PCMCIA VCC/VPP
Power-Switching Networks

6 _______________________________________________________________________________________

_____________________________Typical Operating Characteristics (continued)

(VL = VY = 3.3V, VX = 5V = 12IN, TA = +25°C, unless otherwise noted.)

0

0 10 12

12IN SUPPLY CURRENT

vs. INPUT VOLTAGE

3

MAX1600/3 TOC-18

INPUT VOLTAGE (V)

12IN SUPPLY CURRENT (µA)

2 4 6 8

7

5

1

2

4

6

0

0 5 6

VL SUPPLY CURRENT

vs. VL INPUT VOLTAGE

30

MAX1600/3 TOC-19

INPUT VOLTAGE (V)

VL SUPPLY CURRENT (µA)

1 2 3 4

70

50

10

20

40

60

VX = VY = 0V
12IN

NORMAL
OPERATION

SHUTDOWN

CL = 1µF, RL = 50Ω

VPP_ CURRENT LIMITING

10

5
0

2ms/div

VPP_

(V)

MAX1600/3 TOC-10

RL = 0.1Ω

INPUT CURRENT (VPP OUTPUT SHORTED)

10

5
0

200

300

100

0

100µs/div

VPP_

(V)

I

12IN_

(mA)

MAX1600/3 TOC-11

CIRCUIT OF FIGURE 2

VCC_ SHUTDOWN RESPONSE

4
2
0

4
2
0

100µs/div

VL

(V)

VCC_

(V)

MAX1600/3 TOC-12

MAX1600/MAX1603

Dual-Channel CardBus and PCMCIA VCC/VPP

Power-Switching Networks

_______________________________________________________________________________________

7

_____________________________Typical Operating Characteristics (continued)

(VL = VY = 3.3V, VX = 5V = 12IN, TA = +25°C, unless otherwise noted.)

80

30

0 1000

MAX1600

VY ON-RESISTANCE vs. CURRENT

40

70

MAX1600/3 TOC-14

CURRENT (mA)

VY R

ON

(mΩ)

200 400 600 800

60

50

35

45

75

65

55

TA = +85°C

TA = +25°C

TA = -40°C

165

115

0 1000

MAX1603

VY ON-RESISTANCE vs. CURRENT

125

155

MAX1600/3 TOC-20

CURRENT (mA)

VY R

ON

(mΩ)

200 400 600 800

145

135

120

130

160

150

140

TA = +85°C

TA = +25°C

TA = -40°C

685

0 100 120 140

12IN_ ON-RESISTANCE vs. CURRENT

700

MAX1600/3 TOC-15

CURRENT (mA)

12IN R

ON

(mΩ)

20 40 60 80

720

710

690

695

705

725

715

VPPA

VPPB

550

-40 60 80 100

12IN_ ON-RESISTANCE vs. TEMPERATURE

700

MAX1600/3 TOC-16

TEMPERATURE (°C)

12IN R

ON

(mΩ)

-20 0 20 40

900

800

600

650

750

950

850

0

0 5 6

VX, VY SUPPLY CURRENT

vs. INPUT VOLTAGE

0.3

MAX1600/3 TOC-17

INPUT VOLTAGE (V)

VX, VY SUPPLY CURRENT (µA)

1 2 3 4

0.7

0.5

0.1

0.2

0.4

0.8

0.9

0.6

VX

VY

Channel A VPP Control Input. See

Logic Truth Tables

.A1VPP2

Channel B VCC OutputsVCCB9, 18, 20
Channel B VPP OutputVPPB11
+12V Supply Voltage Input, internally connects to channel B VPP switch. Tie to VPPB if not used.12INB12

Channel A VPP OutputVPPA5

Channel A VCC OutputsVCCA7, 22, 24

+12V Supply Voltage Input, internally connects to channel A VPP switch. Tie to VPPA if not used.12INA4

PIN

GroundGND1

NAME FUNCTION

Channel A VPP Control Input. See

Logic Truth Tables

.A0VPP3

Pin Description

110

60

0 1000

VX ON-RESISTANCE

vs. VCC_ LOAD CURRENT

70

100

MAX1600/3 TOC-13

VCC_ LOAD CURRENT (mA)

VX R

ON

(mΩ)

200

400 600 800

90

80

65

75

105

95

85

TA = +85°C

TA = +25°C

TA = -40°C

VX Supply Voltage Inputs. VX pins must be connected to one another. Input range is +3V to
+5.5V. VX is normally connected to 5V.

VX6, 8, 10

MAX1600/MAX1603

Dual-Channel CardBus and PCMCIA VCC/VPP
Power-Switching Networks

8 _______________________________________________________________________________________

Table 1. Standard “Intel” Code (82365SL),
CODE = GND

Table 2. “Cirrus” Code,
CODE = High (VL)

STBY = Standby Mode STBY = Standby Mode

MODE

ACTIVE

ACTIVE

ACTIVE

STBY

ACTIVE
ACTIVE
ACTIVE
ACTIVE

STBY
STBY
STBY

ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE

_0VPP VPP_

0 12IN

1 VCC_

0 GND

1 GND

1 High-Z
0 GND
1 VCC_
0 12IN

1

0 GND

GND

0 GND

1 High-Z
0 GND
1 VCC_
0 12IN
1 High-Z

VCC_

VX

VY

VY

VY

VY

GND

VY
VX

VY
VY

VX
VX

VY

GND
GND
GND

_1VCC _1VPP

0 1

0 0

0 0

0 1

0 1
1 0
1 0
1 1

0

0 0

0

0 1

1 1
1 0
1 0
1 1
1 1

_0VCC

0

1

1

1

1

0

1
0

1
1

0
0

1

0
0
0

Pin Description (continued)

Channel B VCC Control Input. See

Logic Truth Tables.

B1VCC16

Channel B VPP Control Input. See

Logic Truth Tables.

B1VPP14

Channel A VCC Control Input. See

Logic Truth Tables.

A1VCC26

Three-Level Code-Select Input. See

Logic Truth Tables

.
Low = Standard “Intel” code
High = “Cirrus” code
Mid-supply = “Databook” code (Figure 6)

CODE25

Logic Supply-Voltage Input. Connect to the +3.3V or +5V host system supply. VL can be supplied
via the output of a CMOS-logic gate to produce an overriding shutdown. When used as a
shutdown input, VL should have a 1kΩ series resistor with a 0.1µF capacitor to ground (Figure 2).
Note that VL must be greater than undervoltage lockout for any switches to be turned on.

VL28

VY Supply Voltage Inputs. VY pins must be connected to one another. Input range is +3V to +5.5V.
VY is normally connected to 3.3V.

VY19, 21, 23

Fault-Detection Output. FAULT goes low during current limit, undervoltage lockout, or thermal
limit. FAULT is an open-drain output that requires an external pull-up resistor.

FAULT

17

Channel B VCC Control Input. See

Logic Truth Tables.

B0VCC15

Channel B VPP Control Input. See

Logic Truth Tables.

B0VPP13

PIN NAME FUNCTION

Channel A VCC Control Input. See

Logic Truth Tables.

A0VCC27

Logic Truth Tables

MODE

ACTIVE

ACTIVE

ACTIVE

STBY

ACTIVE
ACTIVE
ACTIVE

_1VCC

ACTIVE

STBY

_1VPP

0

STBY
STBY

1

0

ACTIVE

STBY

0

0

STBY
STBY

0

0

STBY

1

0

_0VPP

1

1

VPP_

0

0

1

12IN

1

0

1

VCC_

0

1

0

0

GND

1

0

High-Z

1

0

0

High-Z

0

1

1

GND

1

1

1

VCC_

0

0

1

12IN

1

0

1

0 High-Z

1

1

High-Z

0

1

High-Z

1 High-Z
0 GND
1 GND
0 GND
1 GND

VCC_

VY

VX

GND

VX

VX

High-Z

VX
VY

GND
GND

VY
VY

_0VCC

0

1

1

1

1

0

1
0

1
1

0
0

1

0

GND

0
0

High-Z
High-Z
High-Z

MAX1600/MAX1603

Dual-Channel CardBus and PCMCIA VCC/VPP

Power-Switching Networks

_______________________________________________________________________________________ 9

Logic Truth Tables (cont.)

Table 3. “Databook” Code,
CODE = Mid-Supply (VL/2)

STBY = Standby Mode X = Don’t Care

MODE

ACTIVE

ACTIVE

ACTIVE

ACTIVE

ACTIVE

_1VCC

STBY

_1VPP

1

ACTIVE

STBY

0

1 1

1 0

0 1

1

_0VPP

1

VPP_

X VCC_

X GND

X

0

0

VCC_

X

0

12IN

X

1

0

GND

0

X

X High-Z

12IN

X GND

VCC_

VX

VY

VY

VX

VX

_0VCC

1

0

0

1

1

0
0
1

GND

VY

GND

Figure 1. Detailed Block Diagram (one channel of two)

Detailed Description

The MAX1600/MAX1603 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. The MAX1600/MAX1603 differ
only in the VY switch on-resistance. Figure 1 is the
detailed block diagram.

The power-input pins (VY, VX, 12IN_) are completely
independent. Low inrush current is guaranteed by con­trolled switch rise times. VCC’s 100µs minimum output
rise time is 100% tested with a 1µF capacitive load, and
VPP’s 1ms minimum rise time is guaranteed with a 0.1µF
load. These respective capacitive loads are chosen as
worst-case card-insertion parameters. The internal
switching control allows VCC and VPP rise times to be

1/2 MAX1600
1/2 MAX1603

VY

VB12

CHARGE

PUMP

VB3

0.08Ω*

CURRENT

LIMIT

VPPA12IN

3Ω

40Ω

VY

CHARGE

PUMP

VX

VX

CONTROL

INPUTS

VB5

CHARGE

PUMP

DECODE

LOGIC

AND UVLO

VDD

VL

0.14Ω

SHDN

CURRENT

LIMIT

CURRENT

LIMIT

THERMAL

SHUTDOWN

VCCA

VCCA

VCCA

20Ω

FAULT

GND

* 0.24Ω FOR THE MAX1603

MAX1600/MAX1603

Dual-Channel CardBus and PCMCIA VCC/VPP
Power-Switching Networks

10 ______________________________________________________________________________________

controlled, and makes them nearly independent of resis­tive and capacitive loads (see rise-time photos in the

Typical Operating Characteristics

). Fall times are a
function of loading, and are compensated by internal
circuitry.

Power savings is automatic: internal charge pumps draw
very low current when the VCC switches are static.
Standby mode reduces switch supply current to 1µA.
Driving the VL pin low with an external logic gate (master
shutdown) reduces total supply current to1µA (Figure 2).

Operating Modes

The MAX1600/MAX1603 are compatible with the Cirrus
CL-PD67XX, Databook DB86184, and Intel 82365SL PC
Card Interface Controllers (PCIC). Eight control inputs
select the internal switches’ positions and the operating
modes according to the input code. Select the proper
code format for the chosen controller with the CODE
input pin (see

Pin Description

and Tables 1, 2, and 3).
CODE reconfigures the logic decoder to one of three
interface controllers:

Low = Standard “Intel” code (Figure 5)
High = “Cirrus” code (Figure 4)
Midsupply = “Databook” code (Figure 6)

An additional 1µA (3µA max) of VL supply current will
flow if CODE = midsupply (VL / 2).

The MAX1600/MAX1603 have three operating modes:
normal, standby, and shutdown. Normal mode supplies
the selected outputs with their appropriate supply volt­ages. Standby mode places all switches at ground,
high impedance, or a combination of the two. Shutdown
mode turns all switches off, and puts the VCC and VPP
outputs into a high-impedance state. Pull VL low to
enter shutdown mode. To ensure a 0.05V/µs fall rate on
VL, use a 1kΩ series resistor and a 0.1µF capacitor to
ground (Figure 2).

Overcurrent Protection

Peak detecting circuitry protects both the VCC and VPP
switches against overcurrent conditions. When current
through any switch exceeds the internal current limit
(4A for VCC switches and 200mA for VPP switches) the
switch turns off briefly, then turns on again at the con­trolled rise rate. If the overcurrent condition lasts more
than 2µs, the FAULT output goes low. FAULT is not
latched. A continuous short-circuit condition results in a
pulsed output current and a pulsed FAULT output until
thermal shutdown is reached. FAULT is open-drain and
requires an external pull-up resistor.

Thermal Shutdown

If the IC junction temperature rises above +150°C, the
thermal shutdown circuitry opens all switches, including
the GND switches, and FAULT is pulled low. When the
temperature falls below +130°C, the switches turn on
again at the controlled rise rate. If the overcurrent con­dition remains, the part cycles between thermal shut­down and overcurrent.

Undervoltage Lockout

If the VX or VY switch input voltage drops below 1.5V,
the associated switch turns off and FAULT goes low.
For example, if VY is 3.3V and VX is 0V, and if the inter­face controller selects VY, the VCCA output will be

3.3V. If VX is selected, VCCA changes to a high-imped­ance output and FAULT goes low.

When a voltage is initially applied to 12IN_, it must be
greater than 8V to allow the switch to operate.
Operation continues until the voltage falls below 2V (the
VPP output is high impedance).

When VL drops to less than 2.3V, all switches are
turned off and the VCC and VPP outputs are high
impedance.

MAX1600
MAX1603

1k

0.1µF

74HC04

VL

VY

VCCA

VPPA

3.3V

VPPB

VCCB

TO
SOCKETS
A AND B

Figure 2. Master Shutdown Circuit

MAX1600
MAX1603

VL

VX+5V

VY

Figure 3. Applying Power to the VL Input

MAX1600/MAX1603

Dual-Channel CardBus and PCMCIA VCC/VPP

Power-Switching Networks

______________________________________________________________________________________ 11

A0VCC

A1VCC

A1VPP

A0VPP

B0VCC

B0VPP

B1VPP

B1VCC

5IN

12IN

3IN

0.1µF0.1µF

0.1µF

MAX1600
MAX1603

MAIN

POWER

SUPPLY

+3.3V

+5V

+12V

VPPA
VCCA

VPPB
VCCB

GND

VPP2

VPP1

VCC1
VCC2

INTERFACE
CARD DETECT

3V CARD
DETECT

SOCKET

A

CIRRUS LOGIC

CL-PD6720
CL-PD6722
CL-PD6729

A_SLOT_VCC

PCMCIA A

INTERFACE

PCMCIA B

INTERFACE

A_-CD [2:1]

B_-CD [2:1]

B_5V_DET

A_5V_DET

B_SLOT_VCC

VPP2

VPP1

VCC1
VCC2

INTERFACE
CARD DETECT
3V CARD

DETECT

SOCKET

B

A_-VCC_3

A_-VCC_5

A_VPP_PGM

A_VPP_VCC

B_-VCC_3

B_-VCC_5

B_VPP_PGM

B_VPP_VCC

HOST I/O

CONTROLLER

VIDEO

CONTROLLER

A_VPP_VALID B_VPP_VALID GND

N.C. N.C.

ISA_VCC

+5V
VDD
VDD

ISA/PCI
INTERFACE

ISA/PCI IBUS

VL CODE FAULT

N.C.

0.1µF 0.1µF

0.1µF0.1µF

17
51

17
51

43

(2)

(

~ 60)

(

~ 60)

(2)

43

Figure 4. Application with Cirrus Logic Interface

B: VPP_ENO
B: VPP_EN1
B: VCC_ENO
B: VCC_EN1
A: VPP_ENO
A: VPP_EN1
A: VCC_ENO
A: VCC_EN1

VL
VY

VX

12IN
CODE

B0VPP

B1VPP
B0VCC
B1VCC

A0VPP

A1VPP
A0VCC
A1VCC

VPPA VCCA SOCKET

INTERFACE

GND

VPPB VCCB

V

CC

MAX1600
MAX1603

82365SL DF

+3.3V

+5V

+12V

TO

SOCKETS

A AND B

TO SOCKETS A AND B

ISA

BUS

SOCKET B

Figure 5. Application with Intel Interface

Applications Information

Supply Bypassing

Bypass the VY, VX, and 12IN_ inputs with ceramic 0.1µF
capacitors. Bypass the VCC_ and VPP_ outputs with a

0.1µF capacitor for noise reduction and ESD protection.

Power-Up

Apply power to the VL input before any of the switch
inputs. If VX, VY, or 12IN receive power before VL rises
above 2.8V, the supply current may be artificially high
(about 5mA). When the voltage on VL is greater than

2.8V, the part consumes its specified 24µA. To avoid
power sequencing, diode-OR VX and VY to VL through
a 1kΩ resistor (Figure 3). Take care not to allow VL to
drop below the 2.8V maximum undervoltage lockout
threshold.

MAX1600/MAX1603

Dual-Channel CardBus and PCMCIA VCC/VPP
Power-Switching Networks

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

12

____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600

© 1998 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

__________________Pin Configuration

28

27
26
25
24
23
22
21
20
19
18
17
16
15

1
2
3
4
5
6
7
8

9
10
11
12
13
14

VL
A0VCC
A1VCC
CODE
VCCA
VY
VCCA
VY
VCCB
VY
VCCB
FAULT
B1VCC
B0VCC

GND
A1VPP
A0VPP

12INA

VPPA

VX

VCCA

VX

VCCB

VX

VPPB

12INB
B0VPP
B1VPP

SSOP

TOP VIEW

MAX1600
MAX1603

___________________Chip Information

TRANSISTOR COUNT: 4372

________________________________________________________Package Information

B:_VCTL1
B:_VCTL2
B:_VCTL0

A:_VCTL1
A:_VCTL2
A:_VCTL0

VL
VY

VX

12IN
CODE

B0VPP

B1VPP
B0VCC
B1VCC

A0VPP

A1VPP
A0VCC
A1VCC

VPPA VCCA SOCKET

INTERFACE

GND

VPPB VCCB

V

CC

MAX1600
MAX1603

DB87144

+3.3V

+5V

+12V

TO

SOCKETS

A AND B

TO SOCKETS A AND B

NOTE: A0VPP AND B0VPP, PINS 3 AND 13
ON THE MAX1600, ARE TIED TO GND.

1M

1M

Figure 6. Block Diagram of the Databook DB87144 PCI to
CardBus Controller Interface to the MAX1600.

SSOP.EPS