MAX5946AETX ,Dual PCI Express, Hot-Plug Controllerapplications. The device provides hot-♦ Hot Swaps 12V, 3.3V, and 3.3V Auxiliary for 2 plug control ..
MAX5947AESA+ ,Positive High-Voltage, Hot-Swap ControllersELECTRICAL CHARACTERISTICS(V = +24V (MAX5947A/B/C), V = +48V (MAX5933A–MAX5933F), GND = 0V, T = -40 ..
MAX5947BESA ,Positive High-Voltage, Hot-Swap ControllersELECTRICAL CHARACTERISTICS(V = +24V (MAX5947A/B/C), V = +48V (MAX5933A–MAX5933F), GND = 0V, T = -40 ..
MAX5947BESA+ ,Positive High-Voltage, Hot-Swap Controllersfeatures suchBackplanesas a choice of active-high or active-low power-good out-puts (PWRGD/PWRGD), ..
MAX5947CESA ,Positive High-Voltage, Hot-Swap ControllersELECTRICAL CHARACTERISTICS(V = +24V (MAX5947A/B/C), V = +48V (MAX5933A–MAX5933F), GND = 0V, T = -40 ..
MAX5948AESA ,-48V Hot-Swap Controllers with External RSENSEFeaturesThe MAX5948A/MAX5948B are hot-swap controllers♦ Allow Safe Board Insertion and Removal from ..
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
MAZ8160-M ,Silicon planar typeelectrical characteristicsZ Zwithin part numbersReverse current I V ··············· Specified value ..
MAX5946AETX
Dual PCI Express, Hot-Plug Controller
General DescriptionThe MAX5946 dual hot-plug controller is designed for
PCI Express™ applications. The device provides hot-
plug control for 12V, 3.3V, and 3.3V auxiliary supplies of
two PCI express slots. The MAX5946’s logic inputs/out-
puts allow interfacing directly with the system hot-plug
management controller or through an SMBus™ with an
external I/O expander. An integrated debounced atten-
tion switch and present-detect signals are included to
simplify system design.
The MAX5946 drives four external n-channel MOSFETs
to control the 12V and 3.3V main outputs. The 3.3V aux-
iliary outputs are controlled through internal 0.3Ω
n-channel MOSFETs. Internal charge pumps provide
gate drive for the 12V outputs while the gate drive of
the 3.3V output is driven by the 12V input supply. The
3.3V auxiliary outputs are completely independent from
the main outputs with their own charge pumps.
At power-up, the MAX5946 keeps all of the external
MOSFETs off until the supplies rise above their respec-
tive undervoltage lockout (UVLO) thresholds. The
device keeps the internal MOSFETs off only until the
auxiliary input supply rises above its UVLO threshold.
Upon a turn-on command, the MAX5946 enhances the
external and internal MOSFETs slowly with a constant
gate current to limit the power-supply inrush current.
The MAX5946 actively limits the current of all outputs at
all times and shuts down if an overcurrent condition
persists for longer than a programmable overcurrent
timeout. Thermal-protection circuitry also shuts down all
outputs if the die temperature exceeds +150°C. After an
overcurrent or overtemperature fault condition, the
MAX5946L latches off while the MAX5946A automatical-
ly restarts after a restart time delay. The device is avail-
able in a 36-pin (6mm ×6mm) thin QFN package and
operates over the -40°C to +85°C temperature range.
ApplicationsServers
Desktop Mobile Server Platforms
Workstations
Embedded Devices
FeaturesPCI Express CompliantHot Swaps 12V, 3.3V, and 3.3V Auxiliary for 2
PCI-E SlotsIntegrated Power MOSFET for Auxiliary Supply
RailsControls dI/dt and dV/dtActive Current Limiting Protects Against
Overcurrent/Short-Circuit ConditionsProgrammable Current-Limit TimeoutPWRGD
Signal Outputs with Programmable
Power-On Reset (POR) (160ms Default)Latched FAULTSignal Output after Overcurrent
or Overtemperature FaultAttention Switch Inputs/Outputs with 4ms
DebouncePresent-Detect InputsForced-On Inputs Facilitates TestingThermal ShutdownAllows Control through SMBus with an I/O
Expander
MAX5946
Dual PCI Express, Hot-Plug
Controller
Pin Configuration
Ordering Information
Typical Application Circuit appears at end of data sheet.SMBus is a trademark of Intel Corp.
PCI Express is a trademark of PCI-SIG Corp.
MAX5946
Dual PCI Express, Hot-Plug
Controller
ABSOLUTE MAXIMUM RATINGSStresses 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.
(All voltages referenced to GND, unless otherwise noted.)
12VIN......................................................................-0.3V to +14V
12GA, 12GB..............................................-0.3V to (V12VIN+ 6V)
12SA+, 12SA-, 12SB+, 12SB-,
3.3GA, 3.3GB.....................................-0.3V to (V12VIN+ 0.3V)
3.3VAUXIN, ONA, ONB, FAULTA, FAULTB............-0.3V to +6V
PWRGDA, PWRGDB................................................-0.3V to +6V
PGND....................................................................-0.3V to +0.3V
All Other Pins to GND......................-0.3V to (V3.3VAUXIN+ 0.3V)
Continuous Power Dissipation (TA= +70°C)
36-Pin Thin QFN (derate 26.3mW/°C above +70°C).....2.105W
Operating Temperature Range...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
ELECTRICAL CHARACTERISTICS(V12VIN= V12S_-= V12S_+= 12V, V3.3S_+= V3.3S_-= V3.3VAUXIN= VON_= VAUXON_= VFON__= 3.3V, PWRGD_= FAULT_= PORADJ
= TIM = OUTPUT_ = 12G_ = 3.3G_ = OPEN, INPUT_ = PRES_DET_= PGND = GND, TA= -40°C to +85°C, unless otherwise noted.
MAX5946
Dual PCI Express, Hot-Plug
Controller
ELECTRICAL CHARACTERISTICS (continued)(V12VIN= V12S_-= V12S_+= 12V, V3.3S_+= V3.3S_-= V3.3VAUXIN= VON_= VAUXON_= VFON__= 3.3V, PWRGD_= FAULT_= PORADJ
= TIM = OUTPUT_ = 12G_ = 3.3G_ = OPEN, INPUT_ = PRES_DET_= PGND = GND, TA= -40°C to +85°C, unless otherwise noted.
Typical values are at TA= +25°C.) (Note 1)
MAX5946
Dual PCI Express, Hot-Plug
Controller
ELECTRICAL CHARACTERISTICS (continued)(V12VIN= V12S_-= V12S_+= 12V, V3.3S_+= V3.3S_-= V3.3VAUXIN= VON_= VAUXON_= VFON__= 3.3V, PWRGD_= FAULT_= PORADJ
= TIM = OUTPUT_ = 12G_ = 3.3G_ = OPEN, INPUT_ = PRES_DET_= PGND = GND, TA= -40°C to +85°C, unless otherwise noted.
Note 1:100% production tested at TA= +25°C. Parameters over temperature are guaranteed by design.
Note 2:PWRGD_asserts a time tPOR_HLafter VPGTH12, VPGTH3.3, and VPGTH3.3AUXconditions are met.
Note 3:The UVLO for the 3.3V supply is sensed at 3.3SA+.
Note 4:This is the time that ON_ or AUXON_ must stay low when resetting a fault condition.
MAX5946
Dual PCI Express, Hot-Plug
Controller
Typical Operating Characteristics(V12VIN= V12SA+= 12V, V3.3VAUXIN= V3.3S_+= VON_= VAUXON_= VINPUT_= 3.3V, PRES-DET_= GND, FON_ = PORADJ = TIM =
float, FAULT_= 10kΩto 3.3VAUXIN, PWRGDA= 10kΩto 3.3VAUXO_, TA= +25°C, unless otherwise noted, see the Typical
Application Circuit.)
