MAX5915 Datasheet, PDF (1/25 Pages) Maxim Integrated Products – Dual PCI 2.2 Hot-Swap Controllers

19-2420; Rev 0; 4/02
Dual PCI 2.2 Hot-Swap Controllers
General Description
The MAX5915/MAX5916 dual PCI 2.2 hot-swap con-
trollers allow for safe insertion and removal of two PCI
cards into live PCI slots or backplanes by limiting the
inrush current at startup. After startup, the
MAX5915/MAX5916 provide protection against short-
circuit, overcurrent, and undervoltage conditions.
The MAX5915/MAX5916 provide independent power
controls for +3.3V, +5V, ±12V, and +3.3V auxiliary sup-
plies of two PCI cards. The MAX5915/MAX5916 provide
intelligent selective thermal shutdown control that shuts
down the channel with an overcurrent fault. Both the
MAX5915 and MAX5916 include internal power
MOSFETs for the +12V, -12V, and +3.3V auxiliary out-
puts. The MAX5915/MAX5916 use internal charge
pumps to activate the gates of the internal FETs control-
ling the +3.3V auxiliary supply. Internal FETs and current-
sense circuitry regulate the ±12V and the +3.3V auxiliary
supplies. Channels A and B operate independently,
allowing a single MAX5915/MAX5916 to monitor two PCI
card slots.
The MAX5915 offers latched fault protection and the
MAX5916 offers autorestart fault protection. The
devices are available in the low-profile 28-pin TSSOP
package and are specified over the -40°C to +85°C
extended temperature range.
PCI 2.2 Server
PCI Server
RAID
Applications
Features
o PCI 2.2 Compliant
o Independent Power Controls for +3.3V, +5V, ±12V,
and +3.3V Auxiliary Supplies of Two PCI Cards
o Internal MOSFET Switches for ±12V and +3.3V
Auxiliary Outputs
o Separate ON/OFF Control Input for Each Channel
o Independent +3.3V Auxiliary Output ON/OFF
Control
o Overcurrent Foldback with Timeout and Shutdown
Protection for ±12V and +3.3V Auxiliary Rails with
Status Report
o Brick Wall with Timeout and Shutdown Protection
for +5V and +3.3V Rails with Status Report
o Output Undervoltage Monitoring for +3.3V, +5V,
+12V, and +3.3V Auxiliary Rails with Status Report
o +3.3V Auxiliary Autorestart
o Intelligent Selective Thermal Shutdown Control
Shuts Down Only the Channel with an Overcurrent
Fault
o 28-Pin TSSOP Package
Ordering Information
PART
FAULT
MANAGEMENT
TEMP
RANGE
PIN-
PACKAGE
MAX5915EUI
Latched
-40°C to +85°C 28 TSSOP
MAX5916EUI Autorestart -40°C to +85°C 28 TSSOP
Pin Configuration, Functional Diagram, and Typical Operating
Circuit appear at end of data sheet.
Typical Application Circuit
+12V
4.7µF 0.1µF
-12V
4.7µF 0.1µF
ON
OFF
10kΩ
+3.3VAUX
4.7µF 0.1µF
ON
OFF
10kΩ
FAIRCHILD
+3.3V FDS6670A
+5V
0.005Ω
FAIRCHILD
FDS6670A
470µF
0.005Ω
470µF
+12VIN ^{3.3VGATE_ 3.3VSEN_ 3.3VO_ 5VGATE_ 5VSEN_}
5VO_
+12VO_
-12VIN
-12VO_
3.3VAUXIN
3.3VAUXO_
47µF
MAX5915
47µF
47µF
MAX5916
5V
ON_
AUXON_
GND
PGOOD_
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