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MIC2590B-5BTQ TR

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P23
MIC2590B
Dual-Slot PCI Hot Plug Controller
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
September 2008
M9999-091808
General Description
The MIC2590B is a power controller supporting power
distribution requirements for Peripheral Component Inter-
connect (PCI) hot plug compliant systems incorporating
the Intelligent Platform Management Interface (IPMI). The
MIC2590B provides complete power control support for
two PCI slots including the 3.3V
AUX
defined by the PCI 2.2
specification.
Support for +5V, +3.3V, +12V and –12V supplies is
provided including programmable constant-current inrush
limiting, voltage supervision, programmable current limit,
fault reporting and circuit breaker functions which provide
fault isolation.
The MIC2590B also incorporates a SMBus interface in
which complete status and control of power within each
slot is provided. Data such as voltage and current from
each supply of each slot can be obtained for IPMI sensor
records in addition to power status of each slot.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Features
• Supports two independent PCI 2.2 slots
• SMBus interface for slot power control and status
• +5V, +3.3V, +12V, –12V, +3.3VAUX supplies supported
per PCI specification 2.2
• Programmable inrush current-limiting
• Active current regulation controls inrush current
• Electronic circuit breaker
• Dual level fault detection for quick fault response
without nuisance tripping
• Thermal isolation between circuitry for slot A and slot B
Applications
• PCI hot-plug power distribution
___________________________________________________________________________________________________________
Ordering Information
Part Number
Standard Pb-Free
5V & 3V Fast-trip
Threshold
+12V & –12V Fast-trip
Threshold
Operating
Temp. Range
Package
MIC2590B-2BTQ MIC2590B-2YTQ 100mV 1.5A/0.4A 0° to +70°C 48-Pin TQFP
MIC2590B-5BTQ* MIC2590B-5YTQ* Disabled 1.5A/0.4A 0° to +70°C 48-Pin TQFP
Note:
* Contact factory for availability.
Micrel, Inc. MIC2590B
September 2008
2
M9999-091808
Typical Application
VAUXA
5VINA
12VIN1 12VIN2 12MVIN1 12MVIN2
5VSENA
5VGATEA
5VOUTA
VSTBY1
VSTBY2
12SLEWA
12SLEWB
CFILTERA
3.3VAUXA
PCI Bus
5V, 5A
3VINA
3VSENSEA
3VGATEA
3VOUTA
12VOUTA
12MVOUTA
5VINB
3.3V, 7.6A
12V, 0.5A
12V, 0.1A
5VSENSEB
5VGATEB
5VOUTB
3VINB
3VSENSEB
3VGATEB
3VOUTB
12VOUTB
12MVOUTB
VAUXB
5V, 5A
3.3V, 7.6A
12V, 0.5A
12V, 0.1A
3.3VAUXB
R
SENSE
R
5VGATEA
R
3VGATEA
R
5VGATEB
R
3VGATEB
R
SENSE
R
SENSE
C
GATE
C
GATE
R
SENSE
PCI Bus
4.7µF
4.7µF
4.7µF
4.7µF
MIC2590B
IREF
CFILTERB
GND
AUXENA/AUXENB
/FAULTA, /FAULTB
A0
A1
A2
/INT
SCL
SDA
PCI
Connector
Power
Supply
+12V
12V
+5.0V
+3.3V
VSTBY
1A Schotty Diode
(Clamp)
/INT
SCL
SDA
SMBus I/O
Management
Controller
2
SDA
SCL
/INT
20k
1%
Hot-Plug
Controller
ONA/ONB
AUXENA/AUXENB
/FAULTA, /FAULTB
ONA/ONB
2
2
C
GATE
C
GATE
A
Bus Switch
B
/OE
Micrel, Inc. MIC2590B
September 2008
3
M9999-091808
Pin Configuration
48-Pin TQFP (TQ)
Pin Description
Pin Number Pin Name Pin Function
6, 31 5VINA, 5VINB
5V Supply Power and Sense Inputs [A/B]: Two pins are provided for Kelvin
connection (one for each slot). Pin 6 is the Kelvin sense connection to the
supply side of the sense resistor for 5V Slot A. Pin 31 is the Kelvin sense
connection to the supply side of the sense resistor for 5V Slot B. These two pins
must ultimately connect to each other within 10cm. An undervoltage lockout
circuit (UVLO) prevents the switches from turning on while this input is less than
its lockout threshold.
12, 25 3VINA, 3VINB
3.3V Supply Power and Sense Inputs [A/B]: Two pins are provided for Kelvin
connection (one for each slot). Pin 12 is the Kelvin sense connection to the
supply side of the sense resistor for 3V Slot A. Pin 25 is the Kelvin sense
connection to the supply side of the sense resistor for 3V Slot B. These two pins
must ultimately connect to each other within 10cm. An undervoltage lockout
circuit (UVLO) prevents the switches from turning on while this input is less than
its lockout threshold.
5, 32 12VIN – 2 pins
+12V Supply Input: An undervoltage lockout circuit prevents the switches from
turning on while this input is less than its lockout threshold. Both pins must be
tied together at the chip.
17, 18 12VMIN – 2 pins
–12V Supply Input: An undervoltage lockout circuit prevents the switches from
turning on while this input is less than its lockout threshold. Both pins must be
tied together at the chip.
10, 27 12VOUTA, 12VOUTB 12V output [A/B]
19, 20 12MVOUTA, 12MVOUTB –12V output [A/B]
3, 34 12VSLEWA, 12VSLEWB
12V Slew Rate Control [A/B]: Connect capacitors between these pins and
ground to set output slew rates of the +12V and -12V supplies.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P23

MIC2590B-5BTQ TR

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Description:
IC PCI HOT PLUG CTLR DUAL 48TQFP
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