MAX8535EUA-MAX8536EUA+-MAX8536EUA+T-MAX8585EUA+-MAX8585EUA+T Fast Delivery |IC PHOENIX CO.,LIMITED

MAX8536EUA+T ,ORing MOSFET Controllers with Fastest Fault Isolation for Redundant Power SuppliesELECTRICAL CHARACTERISTICS(V = 12V (MAX8535/MAX8535A/MAX8585), V = 5V (MAX8536), V = V - 0.1V, R = ..
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MB81F643242C-10FN ,4 x 512K x 32 bit synchronous dynamic RAMFUJITSU SEMICONDUCTORADVANCED INFO. AE0.1EDATA SHEETMEMORYCMOS4 · 512 K · 32 BITSYNCHRONOUS DYNAMIC ..
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MB8264A-10 , MOS 65536-BIT DYNAMIC RANDOM ACCESS MEMORY
MB8264A-10 , MOS 65536-BIT DYNAMIC RANDOM ACCESS MEMORY
MB8264A-10 , MOS 65536-BIT DYNAMIC RANDOM ACCESS MEMORY

MAX8535EUA-MAX8536EUA+-MAX8536EUA+T-MAX8585EUA+-MAX8585EUA+T
ORing MOSFET Controllers with Fastest Fault Isolation for Redundant Power Supplies
neral DescriptionCritical loads often employ parallel-connected power
supplies with redundancy in order to enhance system
reliability. The MAX8535/MAX8536/MAX8585 are highly
integrated but inexpensive MOSFET controllers that pro-
vide isolation and redundant power capability in high-reli-
ability systems. The MAX8535/MAX8585 are used in 12V
systems, and have an internal charge pump to drive the
gates of the n-channel pass elements to VCC+ 10V. The
MAX8536 is used in 3.3V and 5V systems, with a charge-
pump output of VCC+ 5V.
During startup, the MAX8535/MAX8536/MAX8585 moni-
tor the voltage drop across external MOSFETs. Once
VCCapproaches or exceeds the bus voltage, the
MOSFETs are turned on. The MAX8535/MAX8536/
MAX8585feature a dual-purpose TIMER input. A single
external resistor from TIMER to ground sets the turn-on
speed of the external MOSFETs. Optionally, the TIMER
input can be used as a logic-enable pin. Once the
device is turned on, the MAX8535/MAX8536/MAX8585
monitor the load, protecting against overvoltage, under-
voltage, and reverse-current conditions.
Overvoltage and undervoltage fault thresholds are
adjustable and can be disabled. The current-limit trip
points are set by the external MOSFETs’ RDS(ON),
reducing component count. An open-drain logic-low
fault output indicates if an overvoltage, undervoltage, or
reverse-current fault occurs.
All devices come in a space-saving 8-pin μMAX®
package and are specified over the extended -40°C to
+85°C temperature range.
μMAX is a registered trademark of Maxim Integrated Products, Inc.
Applications
Silver Box Supplies for Servers
On-Board Redundant Power Supplies in Blade
Servers
Network/Telecom Power Supplies
Rectifiers
Redundant Power Supplies in High-Availability
Systems
FeaturesSimple, Integrated, and Inexpensive ORing
MOSFET ControllerORing MOSFET Drive for 12V
(MAX8535/MAX8585) and 3.3V or 5V
(MAX8536) BusEliminates ORing Diode Power Dissipation and
Reverse Leakage CurrentProvides N + 1 Redundant Supply Capability for
Highly Reliable SystemsIsolates Failed Supply from Output Bus in <1μsReverse-Current Flow DetectionProgrammable Soft-StartLogic-Enable InputAdjustable Overvoltage and Undervoltage Trip
PointsFault-Indicator OutputSpace-Saving 8-Pin μMAX Package
ORing MOSFET Controllers with Faste
Fault Isolation for Redundant Power Supplie
MAX8535
MAX8536
MAX8585
GATECS
FAULT
UVP
OVPGNDTIMER
VCC
SILVER BOX
RECTIFIERS
OUT+
OUT-
T O
T B
+VO-VO
N.C.
OUTPUT:
3.3V/5V
(MAX8536),
12V
(MAX8535)
Typical Operating Circuit
Ordering Information
19-2735; Rev 1; 3/04
PARTTEMP RANGEPIN-PACKAGE
MAX8535EUA-40°C to +85°C8 μMAX
MAX8535AEUA-40°C to +85°C8 μMAX
MAX8536EUA-40°C to +85°C8 μMAX
MAX8585EUA-40°C to +85°C8 μMAX
Pin Configuration, Functional Diagrams, and Typical
Application Circuits appear at end of data sheet.
EVALUATION KIT
AVAILABLE
ORing MOSFET Controllers with Fastest ult Isolation for Redundant Power Supplies
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VCC= 12V (MAX8535/MAX8535A/MAX8585), VCC= 5V (MAX8536), VCS= VCC - 0.1V, RTIMER= 25kΩ, UVP = 2V, OVP = 1V, CGATE
= 0.01μF, TA= 0°C to +85°C, unless otherwise noted.)
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.
GATE to GND (MAX8535/MAX8535A/MAX8585)...-0.3V to +28V
VCCto GND (MAX8535/MAX8535A/MAX8585).....-0.3V to +18V
CS, FAULTto GND
(MAX8535/MAX8535A/MAX8585)......................-0.3V to +15V
GATE to GND (MAX8536)............................-0.3V to (VCC + 6V)
VCC, CS, FAULTto GND (MAX8536).......................-0.3V to +6V
OVP, UVP, TIMER to GND........................................-0.3V to +6V
Continuous Power Dissipation (TA= +70°C)
8-Pin μMAX (derate 4.5mW/°C above +70°C).............362mW
Operating Temperature Range...........................-40°C to +85°C
Storage Temperature Range.............................-65°C to +150°C
Junction Temperature.........................................………..+150°C
Lead Temperature (soldering, 10s).................................+300°C
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
VCC SUPPLY
VCC = 14V (MAX8535/
MAX8535A/MAX8585)24.5VCC Supply CurrentTIMER = 2.5V
VCC = 6V (MAX8536)23
VCC = 14V (MAX8535/
MAX8535A/MAX8585)4.5VCC Shutdown CurrentTIMER = 0V
VCC = 6V (MAX8536)3
MAX8535/MAX8535A/
MAX8585, charge pump on814
MAX8536, charge pump on3.05.5VCC Input VoltageTIMER = 2.5V
MAX8535/MAX8535A/
MAX8585, charge pump off17
CS = 14V (MAX8535/
MAX8535A/MAX8585)100CS Input CurrentTIMER = 2.5V
CS = 5.5V (MAX8536)50
CS IsolationC S = m ax op er ati ng vol tag e, V C C = 0V , I( V C C ) -0.05-1μA
MAX8535/MAX8535A/MAX8585, rising
threshold66.57VCC Undervoltage LockoutVCCOK
MAX8536, rising threshold2.52.72.9
Rising threshold1414.515VCC Overvoltage Internal
Threshold
MAX8535/
MAX8535A/
MAX8585Falling threshold13.313.914.5
CHARGE-PUMP VOLTAGE
Measured from VGATE to VCC, VCC = 3.3V
(MAX8536)55.56
VCC = 5V (MAX8536)55.56Gate VoltageVGATEC C = 12V ( M AX 8535/M AX 8535A/M AX 8585) 91112
ORing MOSFET Controllers with Fastest
Fault Isolation for Redundant Power Supplie
ELECTRICAL CHARACTERISTICS (continued)
(VCC= 12V (MAX8535/MAX8535A/MAX8585), VCC= 5V (MAX8536), VCS= VCC - 0.1V, RTIMER= 25kΩ, UVP = 2V, OVP = 1V, CGATE
= 0.01μF, TA= 0°C to +85°C, unless otherwise noted.)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
RTIMER = 20kΩ187
RTIMER = 125kΩ450
RTIMER = open500
Charge-Pump Switching
Frequency
VTIMER = 1.5V550
kHz
TIMER
TIMER Voltage1.2191.251.281V
TIMER Maximum Source CurrentVTIMER = 1V80100120μA
TIMER High-Input CurrentVTIMER = 1.5V1020μA
MAX8535/MAX8535A/MAX85851.53.4TIMER Maximum Frequency
Select Voltage Input RangeMAX85361.5VCC - 0.6V
TIMER Logic HighVIHCharge pump enabled1.0V
TIMER Logic LowVILCharge pump disabled0.5V
FAULT
Fault Output Low VoltageIFAULT = 0.5mA0.8V
Fault Sink CurrentFAULT = 0.8V0.5mA
FAULT = 18V ( MAX 8535 /MAX 8535A/MAX 8585)5Fault Leakage CurrentFAULT = 6V (MAX8536)5μA
GATE
Gate On ThresholdMeasured from VCC to CS0.30.40.5V
ITIMER = 0μA (MAX8535/
MAX8535A/MAX8585)355065
VGATE =
VCC = 12VITIMER = 50μA (MAX8535/
MAX8535A/MAX8585)152536
ITIMER = 0μA (MAX8536)172533
Gate Drive Current
VGATE =
VCC = 5VITIMER = 50μA (MAX8536)81216
Gate Shutdown Delay
From fault sense to the start of gate voltage
falling, or from TIMER to the start of gate
voltage falling
200300ns
GATE = VCC + 5V (MAX8535/MAX8536)100200300Gate Discharge CurrentGATE = VCC + 5V (MAX8535A/MAX8585)200300400mAate vol tag e fal l fr om faul t to V GAT E = V C C ,GAT E = 0.01μF ( 200ns + C V /I = 700ns, typ )
(MAX8535/MAX8536)
0.7Gate Fall Time
MAX8535A/MAX85850.55
CURRENT SENSE
Measured from CS to VCC
(MAX8535/MAX8535A/MAX8536)203040Reverse-Current Threshold
MAX8585-30+3
ORing MOSFET Controllers with Fastest ult Isolation for Redundant Power Supplies
ELECTRICAL CHARACTERISTICS
(VCC= 12V (MAX8535/MAX8535A/MAX8585), VCC= 5V (MAX8536), VCS= VCC - 0.1V, RTIMER= 25kΩ, UVP = 2V, OVP = 1V, CGATE
= 0.01μF, TA= -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
VCC SUPPLY
VCC = 14V (MAX8535/
MAX8535A/MAX8585)4.5VCC Supply CurrentTIMER = 2.5V
VCC = 6V (MAX8536)3
VCC = 14V (MAX8535/
MAX8535A/MAX8585)4.5VCC Shutdown CurrentTIMER = 0V
VCC = 6V (MAX8536)3
MAX8535/MAX8535A/
MAX8585, charge pump on814
MAX8536, charge pump on3.05.5VCC Input VoltageTIMER = 2.5V
MAX8535/MAX8535A/
MAX8585, charge pump off17
CS IsolationC S = m ax op er ati ng vol tag e, V C C = 0V , I( V C C ) -1μA
(MAX8535/MAX8535A/MAX8585) rising
threshold6.07.0VCC Undervoltage LockoutVCCOK
(MAX8536) rising threshold2.52.9
Rising threshold1415VCC Overvoltage Internal
Threshold
(MAX8535/
MAX8535A/
MAX8585)Falling threshold13.314.5
ELECTRICAL CHARACTERISTICS (continued)
(VCC= 12V (MAX8535/MAX8535A/MAX8585), VCC= 5V (MAX8536), VCS= VCC - 0.1V, RTIMER= 25kΩ, UVP = 2V, OVP = 1V, CGATE
= 0.01μF, TA= 0°C to +85°C, unless otherwise noted.)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
TIMER = open (MAX8535/MAX8535A/
MAX8536)524Startup Reverse-Current Blank
Time
MAX858532
Forward-Current ThresholdMeasured from VCC to CS51015mV
OVERVOLTAGE PROTECTION
OVP rising1.219 1.251.281OVP Fault ThresholdVOVPOVP falling 1.2V
OVP Bias Current0.2μA
UNDERVOLTAGE PROTECTION
UVP rising threshold1.2191.25 1.281UVP Fault VoltageVUVPUVP falling threshold1.1191.151.181V
UVP Bias Current0.4μA
ORing MOSFET Controllers with Fastest
Fault Isolation for Redundant Power Supplie
ELECTRICAL CHARACTERISTICS (continued)
(VCC= 12V (MAX8535/MAX8535A/MAX8585), VCC= 5V (MAX8536), VCS= VCC - 0.1V, RTIMER= 25kΩ, UVP = 2V, OVP = 1V, CGATE
= 0.01μF, TA= -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
CHARGE-PUMP VOLTAGE
Measured from VGATE to VCC, VCC = 3.3V
(MAX8536)56
VCC = 5V (MAX8536)56Gate VoltageVGATEC C = 12V ( M AX 8535/M AX 8535A/M AX 8585) 912
TIMER
TIMER Voltage1.2001.281V
TIMER Maximum Source CurrentVTIMER = 1.0V80120μA
TIMER High-Input CurrentVTIMER = 1.5V20μA
MAX8535/MAX8535A/MAX85851.53.4TIMER Maximum Frequency
Select Voltage Input RangeMAX85361.5VCC - 0.6V
TIMER Logic HighVIHCharge pump enabled1.1V
TIMER Logic LowVILCharge pump disabled0.5V
FAULT
Fault Output Low VoltageIFAULT = 0.5mA0.8V
Fault Sink CurrentFAULT = 0.8V0.5mA
FAULT = 18V (MAX8535/
MAX8535A/MAX8585)5Fault Leakage Current
FAULT = 6V (MAX8536)5
GATE
Gate On ThresholdMeasured from VCC to CS0.30.5V
ITIMER = 0μA (MAX8535/
MAX8535A/MAX8585)3565
VGATE =
VCC = 12VITIMER = 50μA (MAX8535/
MAX8535A/MAX8585)1536
ITIMER = 0μA (MAX8536)1733
Gate-Drive Current
VGATE =
VCC = 5VITIMER = 50μA (MAX8536)816
Gate Shutdown Delay
From fault sense to the start of gate voltage
falling, or from TIMER to the start of gate
voltage falling
300ns
GATE = VCC + 5V (MAX8535/MAX8536)100300Gate Discharge CurrentMAX8535A/MAX8585200400mA
CURRENT SENSE
Measured from CS to VCC
(MAX8535/MAX8535A/MAX8586)2040Reverse-Current Threshold
MAX8585-5+5
Forward-Current ThresholdMeasured from VCC to CS515mV
ORing MOSFET Controllers with Fastest ult Isolation for Redundant Power Supplies
ELECTRICAL CHARACTERISTICS (continued)
(VCC= 12V (MAX8535/MAX8535A/MAX8585), VCC= 5V (MAX8536), VCS= VCC - 0.1V, RTIMER= 25kΩ, UVP = 2V, OVP = 1V, CGATE
= 0.01μF, TA= -40°C to +85°C, unless otherwise noted.) (Note 1)
Note 1:Specifications to -40°C are guaranteed by design and not production tested.
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
OVERVOLTAGE PROTECTION
OVP Fault ThresholdVOVPOVP rising1.201.281V
OVP Bias Current0.2μA
UNDERVOLTAGE PROTECTION
UVP rising threshold1.2001.281UVP Fault VoltageVUVPUVP falling threshold1.101.19V
UVP Bias Current0.4μA
ORing MOSFET Controllers with Fastest
Fault Isolation for Redundant Power Supplie
STANDBY:
CPMP: OFF
GATE: LOW
WAIT
FOR
VSHARE
CS - VCC < 0.4V
VSHARE = (CS - VCC) < 0.4V
IFORWARD = (VCC - CS) > 0.01V
IREVERSE = (CS - VCC) > 0.03VCS - VCC > 0.4V
VCC > VCCOK
ON:
SET
VSHARE LATCH,
CHARGE PUMP
UVP FAULT
UVP = OK
VCC
CS - 0.4V
CS + 0.01V
VSHARE LATCH
IREVERSE BLANKING
FAULT
SHUTDOWN GATE:
FAULT LATCHED
FAULT
SHUTDOWN GATE:
FAULT LATCHED
UVP FAULT
SHUTDOWN GATE:
FAULT NOT LATCHED
IREVERSE CONDITION DETECTED AFTER
500ms BLANK TIME
(MAX8535/MAX8535A/MAX8536)
(MAX8585)
IREVERSE AFTER
32ms BLANK TIME
CS - 0.03V
IFORWARD
AND OVP FAULT
IFORWARD
IREVERSE
TIMER >1V
ALL TRANSITIONS ARE ASYNCHRONOUS
VCC OR
TIMER
CYCLED
VCC OR
TIMER
CYCLED
500ms
FAULT
SHUTDOWN GATE:
NOT LATCHED
OVP OK AND
IREVERSE DURING
FIRST 500ms
UVP = OK
State Diagram
AX8535 Typical Operating Characteristics(VCC = 12V, RTIMER= 25kΩ, UVP = 2V, OVP = 1V, CGATE= 0.01μF, BUS = 100μF, TA= +25°C, unless otherwise specified.)
ORing MOSFET Controllers with Fastest ult Isolation for Redundant Power Supplies
GATE-CHARGE CURRENT
vs. TIMER RESISTANCE (RTIMER)
X8535/M
AX8536 toc01
RESISTANCE (kΩ)
(μ
TA = -40°C
TA = +25°C
TA = +85°C
SUPPLY CURRENT
vs. TEMPERATURE
X8535/M
AX8536 toc02
TEMPERATURE (°C)
(m6040200-20
TIMER = GND
TIMER IS UNCONNECTED
MAX8535
REVERSE-CURRENT THRESHOLD
vs. TEMPERATURE
X8535/M
AX8536 toc03
TEMPERATURE (°C)
(m3510-15
UVP AND OVP LEAKAGE CURRENT
vs. TEMPERATURE
X8535/M
AX8536 toc04
TEMPERATURE (°C)
(n6040200-20
UVP
OVP
POWER-UP WAVEFORM (VBUS = 0V)
MAX8535/MAX8536 toc05
IMOSFET
10A/div
VCS
10V/div
VGATE
20V/div
VCC
10V/div
4ms/div
POWER-UP WAVEFORM (VBUS = 12V)
MAX8535/MAX8536 toc06
IMOSFET
2A/div
VCS
10V/div
VGATE
20V/div
VCC
10V/div
4ms/div
MAX8535 Typical Operating Characteristics (continued)
(VCC = 12V, RTIMER= 25kΩ, UVP = 2V, OVP = 1V, CGATE= 0.01μF, BUS = 100μF, TA= +25°C, unless otherwise specified.)
ORing MOSFET Controllers with Fastest
Fault Isolation for Redundant Power Supplie
TIMER-ENABLED STARTUP AND SHUTDOWN
WAVEFORMS (VCC = 12V, VBUS = 12V)
MAX8535/MAX8536 toc07
IMOSFET
50mA/div
VCS
10V/div
VGATE
20V/div
VTIMER
2V/div
4ms/div
TIMER-ENABLED STARTUP AND SHUTDOWN
WAVEFORMS (VCC = 12V, VBUS = 0V)
MAX8535/MAX8536 toc08
IMOSFET
10A/div
VCS
10V/div
VGATE
20V/div
VTIMER
1V/div
4ms/div
REVERSE-CURRENT FAULT WAVEFORM
(R1 = 10Ω)
MAX8535/MAX8536 toc09
IMOSFET
5A/div
VFAULT
10V/div
VGATE
20V/div
VCS
1V/div
12V
400ns/div
UVP FAULT WAVEFORM
(R1 = 100Ω)
MAX8535/MAX8536 toc10
VFAULT
10V/div
VUVP
1V/div
1μs/div
1.25V
VCS
10V/div
VGATE
20V/div
SELECTIVE OVP SHUTDOWN WAVEFORM
(R1 = 10Ω)
MAX8535/MAX8536 toc11
VFAULT
10V/div
VGATE1
(OVP UNIT)
20V/div
VGATE2
(GOOD UNIT)
20V/div
VCS
1V/div
12V
1μs/div
AX8536 Typical Operating Characteristics(VCC = 12V, RTIMER= 25kΩ, UVP = 2V, OVP = 1V, CGATE= 0.01μF, BUS = 100μF, TA= +25°C, unless otherwise specified.)
ORing MOSFET Controllers with Fastest ult Isolation for Redundant Power Supplies
GATE-CHARGE CURRENT
vs. TIMER RESISTANCE (RTIMER)
AX8535/M
8536 toc12
RESISTANCE (kΩ)
(μ
TA = +85°C
TA = +25°C
TA = -40°C
SUPPLY CURRENT
vs. TEMPERATURE
AX8535/M
AX8536 toc13
TEMPERATURE (°C)
(m6040200-20
TIMER IS UNCONNECTED
TIMER = GND
MAX8536
REVERSE-CURRENT THRESHOLD
vs. TEMPERATURE
AX8535/M
8536 toc14
TEMPERATURE (°C)
(m3510-15-4085
UVP AND OVP LEAKAGE CURRENT
vs. TEMPERATURE
AX8535/M
AX8536 toc15
TEMPERATURE (°C)
(n6040200-20
UVP
OVP
POWER-UP WAVEFORM (VBUS = 0V)
MAX8535/MAX8536 toc16
IMOSFET
2A/div
VCS
5V/div
VGATE
10V/div
VCC
5V/div
4ms/div
POWER-UP WAVEFORM (VBUS = 5V)
MAX8535/MAX8536 toc17
IMOSFET
1A/div
VCS
5V/div
VGATE
10V/div
VCC
5V/div
4ms/div

Partno	Mfg	Dc	Qty	Available	Descript
MAX8535EUA	MAXIM	N/a	2480	avai	ORing MOSFET Controllers with Fastest Fault Isolation for Redundant Power Supplies
MAX8535EUA	MAXIM ?	N/a	45	avai	ORing MOSFET Controllers with Fastest Fault Isolation for Redundant Power Supplies
MAX8535EUA	MAX	N/a	28	avai	ORing MOSFET Controllers with Fastest Fault Isolation for Redundant Power Supplies
MAX8536EUA+ \|MAX8536EUA	MAXIM	N/a	10	avai	ORing MOSFET Controllers with Fastest Fault Isolation for Redundant Power Supplies
MAX8536EUA+T \|MAX8536EUAT	Pb-free	N/a	19459	avai	ORing MOSFET Controllers with Fastest Fault Isolation for Redundant Power Supplies
MAX8585EUA+ \|MAX8585EUA	MAXIM	N/a	10920	avai	ORing MOSFET Controllers with Fastest Fault Isolation for Redundant Power Supplies
MAX8585EUA+T \|MAX8585EUAT	Pb-free	N/a	5115	avai	ORing MOSFET Controllers with Fastest Fault Isolation for Redundant Power Supplies