MAX5916A Datasheet, PDF (1/25 Pages) Maxim Integrated Products – Dual PCI 2.2 Hot-Swap Controllers

19-2420; Rev 1; 4/04
Dual PCI 2.2 Hot-Swap Controllers
General Description
The MAX5915/MAX5915A/MAX5916/MAX5916A dual
PCI 2.2 hot-swap controllers allow for safe insertion and
removal of two PCI cards into live PCI slots or back-
planes by limiting the inrush current at startup. After
startup, these devices provide protection against short-
circuit, overcurrent, and undervoltage conditions.
The MAX5915/MAX5915A/MAX5916/MAX5916A pro-
vide independent power controls for +3.3V, +5V, ±12V,
and +3.3V auxiliary supplies of two PCI cards. These
devices provide intelligent selective thermal shutdown
control that shuts down the channel with an overcurrent
fault. All devices include internal power MOSFETs for the
+12V, -12V, and +3.3V auxiliary outputs. These devices
use internal charge pumps to activate the gates of the
internal FETs controlling 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 device to moni-
tor two PCI card slots.
The MAX5915/MAX5915A offer latched fault protection
and the MAX5916/MAX5916A offer autorestart fault pro-
tection. 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
TEMP RANGE PIN-PACKAGE
MAX5915EUI
-40°C to +85°C 28 TSSOP
MAX5915AEUI
-40°C to +85°C 28 TSSOP
MAX5916EUI
-40°C to +85°C 28 TSSOP
MAX5916AEUI
-40°C to +85°C 28 TSSOP
Selector Guide, Pin Configuration, Functional Diagram, and
Typical Operating Circuit appear at end of data sheet.
+12V
4.7µF 0.1µF
-12V
4.7µF 0.1µF
ON
OFF
10kΩ
+3.3VAUX
4.7µF 0.1µF
ON
OFF
10kΩ
Typical Application Circuit
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
3.3VAUXIN
MAX5915
-12VO_
3.3VAUXO_
47µF
47µF
47µF
MAX5915A
5V
ON_
MAX5916
MAX5916A
AUXON_
GND
PGOOD_
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