MAX5916AEUI+ Maxim Integrated Products, MAX5916AEUI+ Datasheet - Page 13

• Manufacturer Part Number: MAX5916AEUI+
• Description: IC HOT-SWAP CTRLR DUAL 28-TSSOP
• Manufacturer: Maxim Integrated Products
• Type: Hot-Swap Controllerr

Specifications of MAX5916AEUI+

• Applications: PCI 2.2 Server
• Internal Switch(s): No
• Voltage - Supply: 10.8 V ~ 13.2 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 1. Startup Waveforms
channel outputs, auxiliary and main. A fault condition
occurs when the output voltage falls below the set
undervoltage threshold or the output current reaches the
overcurrent threshold. When a fault occurs, all supplies
of the affected channel are disabled after a time period
t
time equal to t
All supplies are protected against output overcurrent or
short-circuit conditions. The MAX5915/MAX5915A and
MAX5916/MAX5916A employ a “brickwall” current limit
on the +3.3V and +5V supplies and a current-foldback
scheme on the ±12V and +3.3V auxiliary supplies.
A brickwall current limit protects the +3.3V and +5V
main supplies by limiting the load current. The external
DELAY
. All outputs are automatically restarted after a
TIMING NOT TO SCALE
RESTART
______________________________________________________________________________________
. This reset is built into all devices.
3.3VAUXO_
3.3VAUXIN
AUXON_
PGOOD_
+12VO_
-12VO_
3.3VO_
+12VIN
3.3VAUX UVLO THRESHOLD
5VO_
ON_
Dual PCI 2.2 Hot-Swap Controllers
+12V
UVLO THRESHOLD
Current Limits
Brickwall
sense resistors and the current-limit threshold set the
brickwall current limits. A fault occurs when the load
current reaches the brickwall limit. The main outputs
shut down after t
wall feature limits inrush current caused by positive
supply voltage steps.
The ±12V and +3.3V auxiliary supplies employ an
internal current-foldback scheme. The MAX5915/
MAX5915A/MAX5916/MAX5916A gradually limit the load
current once the current-foldback threshold is reached. If
the overcurrent condition lasts longer than a fast tran-
sient, the output current is reduced to the foldback cur-
rent limit and remains at that level for t
overcurrent condition is cleared. See the Typical
Operating Characteristics.
t
START
DELAY
if the fault remains. The brick-
DELAY
unless the
Foldback
13