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SLUS503B – MARCH 2002 – REVISED AUGUST 2002
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ꢁꢐ ꢑ ꢓꢔ ꢕ ꢒꢖꢒꢗ ꢓꢔ
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DESCRIPTION
FEATURES
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The TPS2345 CompactPCI Hot Swap Power
Manager (HSPM) provides highly-integrated
supply control of three positive (3.3-V, 5-V, and
12-V) and one negative (–12-V) supply rails with
a minimum number of external components. A
linear current amplifier (LCA) in each of the four
device channels provides closed-loop control of
load current during insertion and extraction
events. This allows the designer to configure the
plug-in card’s maximum inrush slew rate and
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Enables Hot Swap in CompactPCI High
Availability Systems
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Programmable Current Slew Rate
Power Supply Sequencing
Sense Resistors Set Peak Current (IMAX)
Overcurrent Circuit Breaker at 2× IMAX
Precharge Output
HEALTHY# Signal of Board Power Good
BD_SEL# Signal for Peripheral Enable
On-Chip Charge Pump
magnitude according to the requirements of the
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CompactPCI
PICMG 2.1.
Hot
Swap
Specification
Low Sleep Mode Current
Undervoltage Lockout (UVLO)
Minimal External Parts Count
24-pin TSSOP Package
TYPICAL APPLICATION
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CompactPCI PLUG-IN MODULE
R1
Q1
12V
5V
12 V
5 V
0.025 Ω
R2
Q2
EARLY
VIO
3 mΩ
D1
MAZ3140
C2
0.1 µF
C1
0.1 µF
CS1 GATE1 VS1
VIN2
CS2
R6
10 kΩ
R7
1.2 kΩ
VIN1
GATE2
C6
0.1 µF
BD_SEL#
VS2
BD_SEL#
HEALTHY#
HEALTHY#
RGND
CPUMP
AGND
CPGND
VS3
TPS2345
GND
IRAMP
C3
0.1 µF
C5
0.33 µF
PRECHG
VIN4
D2
GATE3
CS3
CS4 GATE4 VS4
VIN3
3.3 V
3.3 V
MAZ3140
Q3
R3
Q4
R5
10 kΩ
2.5 mΩ
R4
0.25 Ω
C4
0.1 µF
–12 V
–12 V
R8
10 Ω
R
PCI DEVICE
AD[00]
P
EXAMPLE SIGNAL LINE
UDG–01128
AD[00]
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AD[XX:01]
CompactPCI
Bus
AD[XX:01]
PICMGꢀ , CompactPCIꢀ , and the PICMGꢀ and CompactPCIꢀ logos are registered trademarks of the PCI Industrial Computer Manufacturers Group.
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Copyright 2002, Texas Instruments Incorporated
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ꢍ ꢠ ꢞ ꢍꢚ ꢛꢩ ꢈꢜ ꢋ ꢢꢢ ꢊꢋ ꢝ ꢋ ꢉ ꢠ ꢍ ꢠ ꢝ ꢞ ꢤ
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1
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