MAX5943AEEE Fast Delivery |IC PHOENIX CO.,LIMITED

MAX5943AEEE ,FireWire Current Limiter and Low-Drop ORing Switch ControllerApplicationsMAX5943BEEE -40°C to +85°C 16 QSOPFireWire Desktop/Notebook PortMAX5943CEEE -40°C to +8 ..
MAX5943AEEE+ ,FireWire Current Limiter and Low-Drop ORing Switch ControllerApplicationsMAX5943DEEE -40°C to +85°C 16 QSOPFireWire Desktop/Notebook PortMAX5943EEEE -40°C to +8 ..
MAX5944ESE ,Dual FireWire Current Limiter and Low-Drop ORing Switch ControllerApplications Ordering InformationFireWire Desktop/Notebook PortPART TEMP RANGE PIN-PACKAGEFireWire ..
MAX5944ESE+ ,Dual FireWire Current Limiter and Low-Drop ORing Switch ControllerELECTRICAL CHARACTERISTICS(V = 7.5V to 37V, GND = 0V, and T = -40°C to +85°C, unless otherwise note ..
MAX5945CAX ,Quad Network Power Controller for Power-Over-LANapplications. The MAX5945 is pin ♦ Wide Digital Power Input, V , Common-ModeDIGand function compati ..
MAX5945EAX ,Quad Network Power Controller for Power-Over-LANApplicationsMIDSPAN 2 35 AUTOINT 3 34 OUT1Power-Sourcing Equipment (PSE)SCL 4 33 GATE1SDAOUT 5 32 S ..
MAZ8150G ,Silicon planar typeFeatures Package Extremely low noise voltage caused from the diode (2.4 V to Code 39V, 1/3 to 1 ..
MAZ8150-H ,Silicon planar typeZener DiodesMAZ8000 SeriesSilicon planar typeUnit : mmFor stabilization of power supplyKA
MAZ8150-L ,Silicon planar typeFeatures•Extremely low noise voltage caused from the diode (2.4V to 39V,1/3 to 1/10 of our conventi ..
MAZ8150-M ,Silicon planar typeAbsolute Maximum Ratings T = 25°CaMarking SymbolParameter Symbol Rating UnitRefer to the list of t ..
MAZ8160-H ,Silicon planar typeElectrical Characteristics T = 25°CaParameter Symbol Conditions Min Typ Max UnitForward voltage V ..
MAZ8160-L ,Silicon planar typeZener DiodesMAZ8000 SeriesSilicon planar typeUnit : mmFor stabilization of power supplyKA

MAX5943AEEE
FireWire Current Limiter and Low-Drop ORing Switch Controller
General Description
The MAX5943 is a fully integrated power-management
IC for FireWire®applications. This device controls two
external power n-channel MOSFETs to regulate current
from the input power supply to the load and performs
low-voltage-drop, power-supply ORing. The MAX5943
operates over a 7.5V to 37V input range and provides
inrush and output current limit in addition to a diode
ORing function suitable for FireWire applications.
The MAX5943 allows the safe insertion and removal of
FireWire peripherals into a live FireWire port by providing
inrush current control and an output current-limiting func-
tion. The ORing feature provides a very efficient way to
protect the FireWire port when connected to another
FireWire peripheral that sources a higher voltage. By turn-
ing off both external MOSFETS, the MAX5943 provides a
true bidirectional load disconnect. A low-current shut-
down mode disables the MAX5943, resulting in less than
10µA supply current. A pin-selectable input allows
latched or autoretry fault management after a fault.
The MAX5943A features a current-limit function that
actively limits the current drawn by the load with a pro-
grammable timeout. The MAX5943B–MAX5943E do not
actively limit the load current but provide a circuit-breaker
function. See the Selector Guidefor the default and pro-
grammable circuit-breaker timeouts.
The MAX5943 operates over the -40°C to +85°C extended
temperature range and is available in a 16-pin QSOP
package.
Applications
FireWire Desktop/Notebook Port
FireWire Peripheral Device Current Limit
FireWire Hub
Hot Swap
FeaturesProvides Safe Hot Swap for 7.5V to 37V Power
SuppliesLow-Drop Power ORing with Ultra-Fast Turn-OffProgrammable Active Current Limit (MAX5943A)Programmable Circuit Breaker
(MAX5943B–MAX5943E)±5% Current-Limit Sensing AccuracyProgrammable Current-Limit/Circuit-Breaker
TimeoutFast Current-Limit Response to Output Short-
Circuit Conditions (MAX5943A)Drives External N-Channel Power MOSFETsOvercurrent Fault Status OutputLatched or Autoretry Overcurrent Fault
Management10µA Shutdown CurrentON/OFF Control Allows Undervoltage Lockout
ProgrammingFast Load Disconnect Control Through ON Input
MAX5943
FireWire Current Limiter and Low-Drop
ORing Switch Controller
Pin Configuration
Ordering Information
19-3378; Rev 0; 8/04
Typical Operating Circuit and Selector Guide appear at end
of data sheet.
FireWire is a registered trademark of Apple Computers, Inc.
MAX5943
FireWire Current Limiter and Low-Drop
ORing Switch Controller
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VIN= 7.5V to 37V, GND = 0V, and TA= -40°C to +85°C, unless otherwise noted. Typical values are at VIN= 12V, 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.
(Voltages referenced to GND, unless otherwise noted.)
IN............................................................................-0.3V to +80V
OUT........................................................................-0.3V to +80V
SENSE to IN..............................................................-1V to +0.3V
GATE1 to SENSE......................................................-0.3V to +8V
GATE2 to OUT (internally clamped).........................-0.3V to +8V
FAULT.....................................................................-0.3V to +85V
ON, TIM, ILIM, LATCH, OR_ADJ, ONQ1..........-0.3V to (IN + 0.3V)
Continuous Power Dissipation (TA= +70°C)
16-Pin QSOP (derate 8.3mW/°C above +70°C)...........667mW
Operating Temperature Range...........................-40°C to +85°C
Maximum Junction Temperature.....................................+150°C
Storage Temperature Range.............................-60°C to +150°C
ESD Rating (Human Body Model)......................................2000V
Lead Temperature (soldering, 10s).................................+300°C
MAX5943
FireWire Current Limiter and Low-Drop
ORing Switch Controller
ELECTRICAL CHARACTERISTICS (continued)
(VIN= 7.5V to 37V, GND = 0V, and TA= -40°C to +85°C, unless otherwise noted. Typical values are at VIN= 12V, TA= +25°C.)
MAX5943
FireWire Current Limiter and Low-Drop
ORing Switch Controller
ELECTRICAL CHARACTERISTICS (continued)
(VIN= 7.5V to 37V, GND = 0V, and TA= -40°C to +85°C, unless otherwise noted. Typical values are at VIN= 12V, TA= +25°C.)
Note 1:All min/max parameters are tested at +25°C and +85°C. Limits at -40°C are guaranteed by design.
Note 2:Measured at both VGATE2= VOUT= 0V and VGATE2= VOUT= VIN.
Note 3:The typical value of parameter VTHFis 1.5 x VTH.
Note 4:Current-Limit/Circuit-Breaker Timeout; IN or ON low.
Note 5:See the Typical Operating Circuit. Measured at VGATE1= VSENSE.
Note 6:The tristate (“floating”) logic condition will be entered if the pin current is within these limits.
Note 7:RTIMis connected from TIM to GND. The maximum timeout period is enforced to prevent arbitrarily long operation in cur-
rent-limit mode. Therefore, the relationship between resistor value and timeout changes for large values of RTIM. See
Current-Limit Timeout vs. RTIM in the Typical Operating Characteristicsfor nominal values.
Note 8:Parameter tOFFis a direct multiple of tILIM(or tCB), so the limits for tOFFtrack the limits for tILIM (or tCB).
Note 9:If the ON voltage goes below VON_REF- Hysteresis, then GATE2 goes low immediately to disconnect power from the load
quickly (within tON_OFF).
MAX5943
FireWire Current Limiter and Low-Drop
ORing Switch Controller
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX5943 toc01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)3020251510
SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX5943 toc02
SUPPLY VOLTAGE (V)
SHUTDOWN SUPPLY CURRENT (3020251510
CURRENT-LIMIT/CIRCUIT-BREAKER
THRESHOLD VOLTAGE vs. TEMPERATURE
MAX5943 toc03
TEMPERATURE (°C)
THRESHOLD VOLTAGE (mV)3510-15
CURRENT-LIMIT/CIRCUIT-BREAKER
THRESHOLD VOLTAGE vs. TEMPERATURE
MAX5943 toc04
TEMPERATURE (°C)
THRESHOLD VOLTAGE (mV)3510-15
CURRENT-LIMIT/CIRCUIT-BREAKER
THRESHOLD VOLTAGE vs. TEMPERATURE
MAX5943 toc05
TEMPERATURE (°C)
THRESHOLD VOLTAGE (mV)3510-15
TIMEOUT PERIOD vs. RTIM
MAX5943 toc06
RTIM (kΩ)
TIMEOUT PERIOD (
ORing THRESHOLD VOLTAGE
vs. TEMPERATURE
MAX5943 toc07
TEMPERATURE (°C)
ORing THRESHOLD VOLTAGE (mV)35-1510
GATE CURRENTS vs. TEMPERATURE
MAX5943 toc08
TEMPERATURE (°C)
GATE CURRENTS (3510-15-4085
GATE1 DRIVE VOLTAGE
vs. TEMPERATURE
MAX5943 toc09
TEMPERATURE (°C)
GATE1 DRIVE VOLTAGE (V)3510-15
Typical Operating Characteristics
(VIN= +12V, TA= +25°C, unless otherwise noted.)

Partno	Mfg	Dc	Qty	Available	Descript
MAX5943AEEE	MAXIM	N/a	42	avai	FireWire Current Limiter and Low-Drop ORing Switch Controller