MAX5959LECS+ Maxim Integrated Products, MAX5959LECS+ Datasheet - Page 12

• Manufacturer Part Number: MAX5959LECS+
• Description: IC CTRLR HOT-PLUG QD 80-TQFP
• Manufacturer: Maxim Integrated Products
• Type: Hot-Swap Controllerr

Specifications of MAX5959LECS+

• Applications: General Purpose, PCI Express
• Internal Switch(s): No
• Voltage - Supply: 3.3V, 12V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 80-TQFP, 80-VQFP
• Product: Controllers & Switches
• Supply Voltage (max): 14 V
• Supply Voltage (min): 3.3 V
• Power Dissipation: 1860 mW
• Operating Temperature Range: - 40 C to + 85 C
• Mounting Style: SMD/SMT
• Supply Current: 1 mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Quad PCI Express, Hot-Plug Controllers
12
29, 30, 31,
69, 70, 71
32, 33
34, 66
27,28
PIN
23
24
25
26
35
36
37
38
39
40
41
42
______________________________________________________________________________________
3.3AUXOC
3.3VAUXIN
3.3AUXOD
PWRGDC
PWRGDD
PORADJ
FAULTC
FAULTD
3.3SC-
NAME
3.3GC
PGND
12SD-
12VIN
12GD
GND
TIM
Slot C 3.3V Negative Current-Sense Input. Connect to the negative side of the sense resistor using the
Kelvin-sensing technique to ensure accurate current sensing.
Slot C 3.3V Gate-Drive Output. Connect 3.3GC to the gate of slot C’s 3.3V MOSFET. At power-up,
3.3GC is charged to 5.5V above the 3.3V supply by a constant current derived from V
rise time is determined by the external gate capacitance.
Open-Drain Fault Output Signal. FAULTC latches active-low whenever slot C outputs are shut down due
to a fault. A fault is either of:
• An overcurrent condition lasting longer than the overcurrent timeout.
• A device over temperature condition.
If the fault is detected in the main outputs, FAULTC must be reset by toggling the ONC input. If the fault
is in the auxiliary output, FAULTC must be reset by toggling both ONC and AUXONC. For the
autorestart version, FAULTC is reset when the part initiates the next power-on cycle.
Open-Drain Power-Good Output. PWRGDC goes low 160ms after all outputs of slot C reach their final
value and the power MOSFETs are fully enhanced.
Slot C 3.3V Auxiliary Power-Supply Output
3.3V Auxiliary Supply Input. 3.3VAUXIN is the input to a charge pump that drives the internal MOSFETs
connecting 3.3AUXIN to 3.3AUXO_. V
analog references of the MAX5959/MAX5960 and must always be connected to a supply between 3V
and 3.6V. Bypass 3.3AUXIN with at least a 0.1µF capacitor to GND.
Slot D 3.3V Auxiliary Power-Supply Output
Power Ground. Connect externally to GND.
Open-Drain Power-Good Output. PWRGDD goes low 160ms after all outputs of slot D reach their final
value and the power MOSFETs are fully enhanced.
Open-Drain Fault Output Signal. FAULTD latches active-low whenever slot D outputs are shut down due
to a fault. A fault is either of:
• An overcurrent condition lasting longer than the overcurrent timeout.
• A device over temperature condition.
If the fault is detected in the main outputs, FAULTD must be reset by toggling the OND input. If the fault
is in the auxiliary output, FAULTD must be reset by toggling both OND and AUXOND. For the
autorestart version, FAULTD is reset when the part initiates the next power-on cycle.
Overcurrent Timeout Programming Input. Connect a resistor between 500Ω and 500kΩ from TIM to
GND to program t
Power-On-Reset Programming Input. Connect a resistor between 500Ω and 500kΩ from PORADJ to
GND to program the POR timing. Leave unconnected for a default value of 160ms. Connect PORADJ to
GND to completely skip the POR time delay for PWRGD_ assertion.
Ground
12V Supply Input. V
internal charge pump that drives the gates of the MOSFETs connected to 12G_. Bypass 12VIN with a
1µF capacitor to GND. See the Typical Application Circuit and Input Transients section.
Slot D 12V Gate-Drive Output. Connect 12GD to the gate of slot D’s 12V MOSFET. At power-up, V
is raised to the internal charge-pump voltage level by a constant current.
Slot D 12V Negative Current-Sense Input. Connect 12SD- to the negative side of the current-sense
resistor using the Kelvin-sensing technique to ensure accurate current sensing.
FAULT
12VIN
. Leave TIM unconnected for a default timeout of 11ms.
drives the gates of the MOSFETs connected to 3.3G_. 12VIN powers an
3.3AUXIN
FUNCTION
is also used to power the internal control logic and
Pin Description (continued)
12VIN
. V
3.3GC
12GD
‘s