TPS2343 Datasheet, PDF (1/39 Pages) Texas Instruments – DUAL SLOT PCI-X 2.0 HOT-PLUG POWER CONTROLLER

TPS2343
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SLUS644B − FEBRUARY 2005 − MAY 2005
DUAL SLOT PCIĆX 2.0 HOTĆPLUG POWER CONTROLLER
FEATURES
D Supports PCI, PCI−X 1.0 and PCI−X 2.0 Slots
D Internal Power Switches for −12 V, 12 V, 3.3 V
Aux
D Control for Power FETs for 5 V, 3.3 V, and
VIO
D Overload Protection on All Supplies
D Current Regulation on 3.3 V, 5 V and VIO
Supplies
D Soft Start to Minimize Inrush Current
D Programmable Slew Rate for 3.3 V, 5 V, 12 V,
VIO and Vaux Supplies
D Direct Control of All Functions
D VIO Selection Based on Card Type
D 80-Lead PowerPadt HTSSOP Package
D Narrow Package that Fits Between PCI Slots
APPLICATIONS
D Hot Plug Slots in Servers
SIMPLIFIED APPLICATION DIAGRAM
PCI-X 2.0 SLOT
VIO
DESCRIPTION
Each TPS2343 contains main supply power
control, auxiliary supply power control, power
FETs for 12-V, −12-V and auxiliary 3.3-V supplies,
VIO control, and digital control for two slots.
The main power control circuits start with all
supplies off and all outputs are held off until
PGOOD is asserted, indicating that system
supplies are valid. Then, when power enable is
asserted, the control circuit applies constant
current to the gates of the power FETs, allowing
each FET to ramp load voltage linearly. Each
supply can be programmed for a desired ramp
rate by selecting the appropriate gate capacitor.
The TPS2343 monitors load current and regulates
peak current to prevent disturbances to the
system power rails. If load current remains
regulated for longer than 5 ms, that slot is latched
off.
Logic inputs to the TPS2343 access all functions
of the TPS2343. All status information from the
TPS2343 is available on logic outputs.
PCI-X 2.0 SLOT
VIO
CONTROL
LOGIC
1.5 V 3.3 V 5 V
3.3VAUX 12V −12V CONTROL −12V 12V 3.3VAUX
5 V 3.3 V 1.5 V
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PowerPadt is a trademark of Texas Instruments Incorporated.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright  2005, Texas Instruments Incorporated
www.ti.com
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