TPS2459
www.ti.com ............................................................................................................................................................................................ SLUS917–FEBRUARY 2009
12-V/3.3-V Hot Swap and ORing Controller with I2C™
and Load Current Monitor for AdvancedMC™
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FEATURES
APPLICATIONS
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ATCA Carrier Boards
MicroTCA™Power Modules
AdvancedMC™ Slots
Systems Using 12-V and 3.3-V Channels
Base Stations
23
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ATCA AdvancedMC™ Compliant
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Full Power Control for an AdvancedMC™
Module
Independently Programmable 12-V Current
Limit and Fast Trip
3.3-V and 12-V FET ORing Control for
MicroTCA™
DESCRIPTION
12-V Output Shuts Off If 3.3-V Output Shuts
Off
The TPS2459 hot-plug controller performs all
necessary power interface functions for an
AdvancedMC™ (Advanced Mezzanine Card). A fully
integrated 3.3-V channel provides inrush control,
over-current protection, and FET ORing. A 12-V
channel provides the same functions using external
FETs and sense resistors. The 3.3-V current limit is
factory set to AdvancedMC™ compliant levels while
the 12-V current limit is programmed using external
sense resistors. The accurate current sense
comparators of the TPS2459 satisfy the narrow
ATCA™ AdvancedMC™ current limit requirements.
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Internal 3.3-V Current Limit and ORing
I2C™ Power Good and Fault Reporting
I2C™ Programmable Fault Times and Limits
FET Status Bits for 3.3-V and 12-V Channels
Load Current Monitors for 12-V and 3.3-V
32-Pin QFN Package
TYPICAL APPLICATION
0.005 W
12 V
12 V
V
IN
422 W
AdvancedMCTM
15
14
13
12
11
6
8
3.3 V
IN12 SENP SET
SENM PASS BLK OUT12 OUT3 17
3.3 V
16 IN3
22
V
IN
PG12
4
7
VDD3
FLT12
28 EN12
26 EN3
Status Outputs
PG3 20
FLT3 19
Enable
{
{
TPS2459
10 OREN
6810 W
3320 W
2
3
SDA
SCL
2
SUM12
5
I C Interface
SUM3 21
1
VINT
A0 A1 A2
30 18 25
GND
UDG-09031
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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.
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AdvancedMC, MicroTCA are trademarks of PCI Industrial Computer Manufacturers Group.
I2C is a trademark of Phillips.
PRODUCT PREVIEW information concerns products in the
formative or design phase of development. Characteristic data and
other specifications are design goals. Texas Instruments reserves
the right to change or discontinue these products without notice.
Copyright © 2009, Texas Instruments Incorporated