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19-4752; Rev 3; 5/98
Dual-Channel CardBus and PCMCIA VCC/VPP Power-Switching Networks
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 10A 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 140m). 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, 0.08 Max 3.3V VCC Switch (MAX1600 only) 1A, 0.14 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 = +150C o Independent Internal Charge Pumps o Break-Before-Make Switching Action o 10A 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)
MAX1600/MAX1603
Simplified Block Diagram
12IN VPPA
MAX1600/MAX1603
VY VY VX VCCA VCCA VCCA VDD CONTROL INPUTS DECODE LOGIC CODE SELECT GND 12IN VY VX VCCB VCCB VCCB OVERCURRENT AND THERMAL SHUTDOWN FAULT CODE VPPB
________________________Applications
Desktop Computers Notebook Computers Handy-Terminals Data Loggers Docking Stations PCMCIA Read/Write Drives
VX VL
Ordering Information
PART MAX1600EAI MAX1603EAI TEMP. RANGE -40C to +85C -40C to +85C PIN-PACKAGE 28 SSOP 28 SSOP
Pin Configuration appears on last page.
________________________________________________________________ Maxim Integrated Products
1
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Dual-Channel CardBus and PCMCIA VCC/VPP Power-Switching Networks MAX1600/MAX1603
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 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 (TA = +70C) SSOP (derate 9.52mW/C above +70C) ....................762mW Operating Temperature Range MAX160_EAI/MAX1603EAI..............................-40C to +85C Storage Temperature Range .............................-65C to +160C Lead Temperature (soldering, 10sec) .............................+300C
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
(VL = VY = 3.3V, VX = 5V, 12INA = 12INB = 12V, TA = 0C to +85C, unless otherwise noted. Typical values are at TA = +25C.) PARAMETER POWER-SUPPLY SECTION Input Voltage Range VX, VY or VL 12INA, 12INB VL falling edge 12IN falling edge 12IN rising edge VX, VY falling edge Standby Supply Current VY Quiescent Supply Current VX Quiescent Supply Current 12IN_ Standby Supply Current 12IN_ Quiescent Supply Current VL Standby Supply Current VL Quiescent Supply Current VL Fall Rate VCC SWITCHES Operating Output Current Range On-Resistance, VY Switches VCCA or VCCB, VX = VY = 3V to 5.5V 12INA = 12INB = 0V to 13V, VY = 3V, VX = 0V to 5.5V, ISWITCH = 1A, TA = +25C MAX1600 MAX1603 0 0.06 0.14 0.10 1.2 1 0.08 0.24 0.14 4 A A VX or VY, all switches 0V or high-Z, control inputs = 0V or VL, TA = +25C 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 = +25C 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 = +25C Any combination of switches on When using VL as shutdown pin (Note 3) 15 4 25 20 20 3.0 11 2.4 1.8 5.0 1.4 5.5 13 2.8 10.0 2.8 1 100 100 1 100 10 150 0.05 A A A A A A A V/s V CONDITIONS MIN TYP MAX UNITS
2.5 3.0 8.0 2.5
Undervoltage Lockout Threshold
V
On-Resistance, VX Switches Output Current Limit 2
12INA = 12INB = 0V to 13V, VX = 4.5V, VY = 0V to 5.5V, ISWITCH = 1A, TA = +25C VCCA or VCCB
_______________________________________________________________________________________
Dual-Channel CardBus and PCMCIA VCC/VPP Power-Switching Networks
ELECTRICAL CHARACTERISTICS (continued)
(VL = VY = 3.3V, VX = 5V, 12INA = 12INB = 12V, TA = 0C to +85C, unless otherwise noted. Typical values are at TA = +25C.) 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) ISINK = 1mA, low state V FAULT = 5.5V, high state Hysteresis = 20C (Note 4) __VCC, __VPP __VCC, __VPP "Intel" code "Cirrus" code "Databook" code __VCC, __VPP, code 1.5 0 VL - 0.4 1.2 -1 0.4 VL VL - 1.2 1 -0.5 150 0.6 1 0.4 0.5 s V A C V V V V V A VPPA or VPPB 12IN = 11.6V, ISWITCH = 100mA, TA = +25C Programmed to VX (5V) or VY (3.3V), TA = +25C 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 = +25C VPPA or VPPB, 0V to 12IN_, CL = 0.1F, 50% of input to 90% of output, TA = +25C VPPA or VPPB, 0V to 12IN_, CL = 0.1F, 10% to 90% points, TA = +25C VPPA or VPPB, 12IN_ to 0V, CL = 0.1F, 50% of input to 10% of output, TA = +25C VPPA or VPPB, 12IN_ to 0V, CL = 0.1F, 90% to 10% points 100 1.2 800 9 1 60 130 10 10 30 0 0.70 1 200 120 1 3 260 mA mA mA A ms s ms ms CONDITIONS VCCA or VCCB < 0.4V, programmed to 0V state VCCA or VCCB forced to 0V, high-Z state, TA = +25C VCCA or VCCB, 0V to VX or VY, CL = 30F, RL = 25, 50% of input to 90% of output, TA = +25C VCCA or VCCB, 0V to VX or VY, CL = 1F, RL = open circuit, 10% to 90% points, TA = +25C VCCA or VCCB, VX or VY to 0V, CL = 30F, RL = open circuit, 50% of input to 10% of output, TA = +25C VCCA or VCCB, VX or VY to 0V, CL = 1F, RL = 25, 90% to 10% points 100 2 1200 MIN 20 10 10 TYP MAX UNITS mA A ms s
MAX1600/MAX1603
60
100
ms
6
ms
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3
Dual-Channel CardBus and PCMCIA VCC/VPP Power-Switching Networks MAX1600/MAX1603
ELECTRICAL CHARACTERISTICS
(VL = VY = 3.3V, VX = 5V, 12INA = 12INB = 12V, TA = -40C to +85C, unless otherwise noted.) PARAMETER POWER-SUPPLY SECTION Input Voltage Range VX, VY or VL 12INA, 12INB VL falling edge, hysteresis = 1% 12IN falling edge 12IN rising edge VX, VY falling edge Standby Supply Current VY Quiescent Supply Current VX Quiescent Supply Current 12IN_ Standby Supply Current 12IN_ Quiescent Supply Current VL Standby Supply Current VL Quiescent Supply Current FAULT Output Low Voltage Logic Input Low Voltage Logic Input High Voltage VX or VY, all switches 0V or high-Z, control inputs = 0V or VL, TA = TMIN to TMAX 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 VPB 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 ISINK = 1mA, low state __VCC, __VPP __VCC, __VPP 1.6 3.0 11 2.3 1.8 5 1.4 10 2.9 15 100 100 15 100 15 150 0.4 0.6 A A A A A A A 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).
__________________________________________Typical Operating Characteristics
(VL = VY = 3.3V, VX = 5V = 12IN, TA = +25C, unless otherwise noted.) VCC_ SWITCHING (RISE)
MAX1600/3 TOC-01
VCC_ SWITCHING (RISE)
3 VCC_ (V) 2 1 0 CONTROL 5 INPUT 0 (V)
MAX1600/3 TOC-02
6 VCC_ (V) 4 2 0 CONTROL 5 INPUT 0 (V)
200s/div CL = 30F, RL = 25
CL = 1F, RL =
500s/div
4
_______________________________________________________________________________________
Dual-Channel CardBus and PCMCIA VCC/VPP Power-Switching Networks
_____________________________Typical Operating Characteristics (continued)
(VL = VY = 3.3V, VX = 5V = 12IN, TA = +25C, unless otherwise noted.) VCC_ SWITCHING (FALL)
MAX1600/3 TOC-03
MAX1600/MAX1603
VCC_ SWITCHING (FALL)
6 4 VCC_ (V) 2 0
MAX1600/3 TOC-04
6 VCC_ (V) 4 2 0 CONTROL 5 INPUT 0 (V)
CONTROL 5 INPUT 0 (V)
CL = 33F, RL =
10ms/div CL = 1F, RL = 25
10ms/div
VPP_ SWITCHING (RISE)
MAX1600/3 TOC-05
VPP_ SWITCHING (FALL)
15 10 VPP_ (V) 5 0 CONTROL 5 INPUT 0 (V)
MAX1600/3 TOC-06
15 10 VPP_ (V) 5 0 CONTROL 5 INPUT 0 (V)
CL = 0.1F, RL =
200s/div
CL = 0.1F, RL =
2ms/div
VCC_ CURRENT LIMITING
MAX1600/3 TOC-08
INPUT CURRENT (VCC OUTPUT SHORTED)
2.0 1.5 IVY (A) 1.0 0.5 0
MAX1600/3 TOC-09
4 VCC_ (V) 2 0
2ms/div CL = 1F, RESISTIVE OVERLOAD, RL = 1
1ms/div
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5
Dual-Channel CardBus and PCMCIA VCC/VPP Power-Switching Networks MAX1600/MAX1603
_____________________________Typical Operating Characteristics (continued)
(VL = VY = 3.3V, VX = 5V = 12IN, TA = +25C, unless otherwise noted.)
VPP_ CURRENT LIMITING
MAX1600/3 TOC-10
INPUT CURRENT (VPP OUTPUT SHORTED)
10 5 VPP_ (V) 0 300 I12IN_ (mA) 200 100 0
MAX1600/3 TOC-11
10 VPP_ (V) 5 0
2ms/div CL = 1F, RL = 50 RL = 0.1
100s/div
VCC_ SHUTDOWN RESPONSE
4 VL (V) 2 0
MAX1600/3 TOC-12
4 VCC_ (V) 2 0 100s/div CIRCUIT OF FIGURE 2
12IN SUPPLY CURRENT vs. INPUT VOLTAGE
MAX1600/3 TOC-18
VL SUPPLY CURRENT vs. VL INPUT VOLTAGE
VX = VY = 0V 12IN
MAX1600/3 TOC-19
7 6 12IN SUPPLY CURRENT (A) 5 4 3 2 1 0 0 2 4 6 8 10
70 60 VL SUPPLY CURRENT (A) 50 40 30 20 10 0 SHUTDOWN NORMAL OPERATION
12
0
1
2
3
4
5
6
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
6
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Dual-Channel CardBus and PCMCIA VCC/VPP Power-Switching Networks
_____________________________Typical Operating Characteristics (continued)
(VL = VY = 3.3V, VX = 5V = 12IN, TA = +25C, unless otherwise noted.)
12IN_ ON-RESISTANCE vs. CURRENT
MAX1600/3 TOC-15
MAX1600/MAX1603
12IN_ ON-RESISTANCE vs. TEMPERATURE
MAX1600/3 TOC-16
VX, VY SUPPLY CURRENT vs. INPUT VOLTAGE
0.8 VX, VY SUPPLY CURRENT (A) VX 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 VY
MAX1600/3 TOC-17
725 720 715 12IN RON (m) VPPA
950 900 850 12IN RON (m) 800 750 700 650 600 550
0.9
710 705 700 695 690 685 0 20 40 60 80 100 120 140 CURRENT (mA) VPPB
-40
-20
0
20
40
60
80
100
0
1
2
3
4
5
6
TEMPERATURE (C)
INPUT VOLTAGE (V)
VX ON-RESISTANCE vs. VCC_ LOAD CURRENT
MAX1600/3 TOC-13
MAX1600 VY ON-RESISTANCE vs. CURRENT
MAX1600/3 TOC-14
MAX1603 VY ON-RESISTANCE vs. CURRENT
160 155 150 VY RON (m) 145 140 135 130 TA = +25C TA = +85C
MAX1600/3 TOC-20
110 105 100 95 VX RON (m) 90 85 80 75 70 65 60 0 200 400 600 TA = -40C 800 TA = +25C TA = +85C
80 75 70 65 VY RON (m) 60 55 50 45 40 35 30 TA = -40C TA = +25C TA = +85C
165
125 120 115 TA = -40C 0 200 400 600 800 1000
1000
0
200
400
600
800
1000
VCC_ LOAD CURRENT (mA)
CURRENT (mA)
CURRENT (mA)
Pin Description
PIN 1 2 3 4 5 6, 8, 10 7, 22, 24 9, 18, 20 11 12 NAME GND A1VPP A0VPP 12INA VPPA VX VCCA VCCB VPPB 12INB Ground Channel A VPP Control Input. See Logic Truth Tables. Channel A VPP Control Input. See Logic Truth Tables. +12V Supply Voltage Input, internally connects to channel A VPP switch. Tie to VPPA if not used. Channel A VPP Output 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. Channel A VCC Outputs Channel B VCC Outputs Channel B VPP Output +12V Supply Voltage Input, internally connects to channel B VPP switch. Tie to VPPB if not used. 7 FUNCTION
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Dual-Channel CardBus and PCMCIA VCC/VPP Power-Switching Networks MAX1600/MAX1603
Pin Description (continued)
PIN 13 14 15 16 17 19, 21, 23 NAME B0VPP B1VPP B0VCC B1VCC FAULT VY FUNCTION Channel B VPP Control Input. See Logic Truth Tables. Channel B VPP Control Input. See Logic Truth Tables. Channel B VCC Control Input. See Logic Truth Tables. Channel B VCC Control Input. See Logic Truth Tables. 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. 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. Three-Level Code-Select Input. See Logic Truth Tables. Low = Standard "Intel" code High = "Cirrus" code Mid-supply = "Databook" code (Figure 6) Channel A VCC Control Input. See Logic Truth Tables. Channel A VCC Control Input. See Logic Truth Tables. 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 1k series resistor with a 0.1F capacitor to ground (Figure 2). Note that VL must be greater than undervoltage lockout for any switches to be turned on.
25
CODE
26 27
A1VCC A0VCC
28
VL
Logic Truth Tables
Table 1. Standard "Intel" Code (82365SL), CODE = GND
_1VCC _0VCC _1VPP 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 _0VPP 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 VCC_ GND GND GND GND VY VY VY VY VX VX VX VX VY VY VY VY VPP_ GND GND GND GND GND VCC_ 12IN GND VCC_ 12IN GND VCC_ 12IN MODE STBY STBY STBY STBY ACTIVE ACTIVE ACTIVE ACTIVE ACTIVE ACTIVE ACTIVE ACTIVE ACTIVE
Table 2. "Cirrus" Code, CODE = High (VL)
_1VCC _0VCC _1VPP 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 _0VPP 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 VCC_ High-Z High-Z High-Z High-Z VX VX VX VX VY VY VY VY GND GND GND GND VPP_ High-Z High-Z High-Z High-Z GND VCC_ 12IN GND VCC_ 12IN GND GND GND GND MODE STBY STBY STBY STBY ACTIVE ACTIVE ACTIVE ACTIVE ACTIVE ACTIVE STBY STBY STBY STBY
High-Z ACTIVE
High-Z ACTIVE
High-Z ACTIVE
High-Z ACTIVE
High-Z ACTIVE
STBY = Standby Mode
8
STBY = Standby Mode
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Dual-Channel CardBus and PCMCIA VCC/VPP Power-Switching Networks
Logic Truth Tables (cont.)
Table 3. "Databook" Code, CODE = Mid-Supply (VL/2)
_1VCC _0VCC _1VPP 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 _0VPP X X X X X X X X VCC_ GND VY GND VX VY VY VX VX VPP_ High-Z 12IN GND 12IN VCC_ GND VCC_ GND MODE STBY ACTIVE STBY ACTIVE ACTIVE ACTIVE ACTIVE ACTIVE
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 100s minimum output rise time is 100% tested with a 1F capacitive load, and VPP's 1ms minimum rise time is guaranteed with a 0.1F 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
MAX1600/MAX1603
STBY = Standby Mode
X = Don't Care
VB12
12IN
VPPA
1/2 MAX1600 1/2 MAX1603
CHARGE PUMP CURRENT LIMIT
3
40
VY VY
VB3 0.08*
CHARGE PUMP
CURRENT LIMIT
VCCA VCCA
VX VX
VCCA VB5 0.14 20
CHARGE PUMP
CURRENT LIMIT
FAULT
CONTROL INPUTS
DECODE LOGIC AND UVLO VDD
SHDN THERMAL SHUTDOWN GND
VL
* 0.24 FOR THE MAX1603
Figure 1. Detailed Block Diagram (one channel of two)
_______________________________________________________________________________________ 9
Dual-Channel CardBus and PCMCIA VCC/VPP Power-Switching Networks MAX1600/MAX1603
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 1A. Driving the VL pin low with an external logic gate (master shutdown) reduces total supply current to1A (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 2s, 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.
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 1A (3A 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/s fall rate on VL, use a 1k series resistor and a 0.1F capacitor to ground (Figure 2).
Thermal Shutdown
If the IC junction temperature rises above +150C, the thermal shutdown circuitry opens all switches, including the GND switches, and FAULT is pulled low. When the temperature falls below +130C, 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.
3.3V 1k VL 74HC04 0.1F VY VPPA VCCA TO SOCKETS A AND B VPPB VCCB VY VL
MAX1600 MAX1603
+5V
VX
MAX1600 MAX1603
Figure 2. Master Shutdown Circuit
10
Figure 3. Applying Power to the VL Input
______________________________________________________________________________________
Dual-Channel CardBus and PCMCIA VCC/VPP Power-Switching Networks MAX1600/MAX1603
N.C.
VL MAIN +3.3V +5V POWER SUPPLY +12V 3IN 5IN 12IN
CODE
FAULT VPPA VCCA 0.1F 0.1F 17 51
VPP1 VPP2 VCC1 VCC2 SOCKET A
MAX1600 MAX1603
VPPB 0.1F 0.1F 0.1F B0VPP B1VPP B1VCC B0VCC A0VPP A1VPP A1VCC A0VCC ISA_VCC +5V VDD VDD HOST I/O CONTROLLER ISA/PCI INTERFACE ISA/PCI IBUS VIDEO CONTROLLER A_VPP_VALID N.C. B_VPP_VALID N.C. A_VPP_PGM A_-VCC_5 A_-VCC_3 VCCB 0.1F GND 43 B_VPP_VCC B_VPP_PGM B_-VCC_5 B_-VCC_3 A_VPP_VCC A_SLOT_VCC PCMCIA A INTERFACE A_-CD [2:1] A_5V_DET B_SLOT_VCC PCMCIA B INTERFACE B_-CD [2:1] B_5V_DET GND (~ 60) (2) 17 51 (~ 60) (2) 0.1F
INTERFACE CARD DETECT
3V CARD DETECT
CIRRUS LOGIC CL-PD6720 CL-PD6722 CL-PD6729
VPP1 VPP2 VCC1 VCC2 SOCKET B
INTERFACE CARD DETECT 43 3V CARD DETECT
Figure 4. Application with Cirrus Logic Interface
Applications Information
TO SOCKETS A AND B
Supply Bypassing
Bypass the VY, VX, and 12IN_ inputs with ceramic 0.1F capacitors. Bypass the VCC_ and VPP_ outputs with a 0.1F capacitor for noise reduction and ESD protection.
VPPA VCCA VPPB VCCB SOCKET INTERFACE
VCC
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 24A. To avoid power sequencing, diode-OR VX and VY to VL through a 1k resistor (Figure 3). Take care not to allow VL to drop below the 2.8V maximum undervoltage lockout threshold.
+3.3V
VL VY
MAX1600 MAX1603 B0VPP
B1VPP B0VCC B1VCC A0VPP A1VPP A0VCC A1VCC
82365SL DF
B: VPP_ENO B: VPP_EN1 B: VCC_ENO B: VCC_EN1 A: VPP_ENO A: VPP_EN1 A: VCC_ENO A: VCC_EN1 SOCKET B TO SOCKETS A AND B
+5V +12V
VX 12IN CODE
GND
ISA BUS
Figure 5. Application with Intel Interface
11
______________________________________________________________________________________
Dual-Channel CardBus and PCMCIA VCC/VPP Power-Switching Networks MAX1600/MAX1603
TO SOCKETS A AND B VPPA VCCA VPPB VCCB SOCKET INTERFACE
__________________Pin Configuration
VCC
TOP VIEW
GND 1
TO SOCKETS A AND B
+3.3V
VL VY
MAX1600 MAX1603 B0VPP
B1VPP B0VCC B1VCC A0VPP A1VPP A0VCC A1VCC
DB87144
B:_VCTL1 B:_VCTL2 B:_VCTL0 A:_VCTL1 A:_VCTL2 A:_VCTL0
28 VL 27 A0VCC 26 A1VCC 25 CODE
A1VPP 2 A0VPP 3 12INA 4 VPPA 5 VX 6 VCCA 7 VX 8
+5V 1M +12V
VX 12IN CODE
MAX1600 MAX1603
24 VCCA 23 VY 22 VCCA 21 VY 20 VCCB 19 VY 18 VCCB 17 FAULT 16 B1VCC 15 B0VCC
GND
1M NOTE: A0VPP AND B0VPP, PINS 3 AND 13 ON THE MAX1600, ARE TIED TO GND.
VCCB 9 VX 10 VPPB 11 12INB 12 B0VPP 13 B1VPP 14
Figure 6. Block Diagram of the Databook DB87144 PCI to CardBus Controller Interface to the MAX1600.
___________________Chip Information
TRANSISTOR COUNT: 4372
SSOP
________________________________________________________Package Information
SSOP.EPS
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 (c) 1998 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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