MIC2592B-2BTQ Micrel Inc, MIC2592B-2BTQ Datasheet - Page 4

• Manufacturer Part Number: MIC2592B-2BTQ
• Description: IC CTRLR HOTPLUG PCI DUAL 48TQFP
• Manufacturer: Micrel Inc
• Type: Hot-Swap Controllerr

Specifications of MIC2592B-2BTQ

• Applications: General Purpose, PCI Express
• Internal Switch(s): No
• Voltage - Supply: 3.3V, 12V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 48-TQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Pin Description
March 2005
Pin Number
Pin Number
Pin Number
Pin Number
32
32
32
32
12
12
12
12
25
25
25
25
16
16
16
16
21
21
21
21
10
10
10
10
27
27
27
27
29
29
29
29
13
13
13
13
24
24
24
24
34
34
34
34
14
14
14
14
23
23
23
23
5
5
5
8
8
8
8
3
3
3
3
12VSENSEB
12VSENSEB
12VSENSEB
12VSENSEB
12VSENSEA
12VSENSEA
12VSENSEA
12VSENSEA
3VSENSEB
3VSENSEB
3VSENSEB
3VSENSEB
3VSENSEA
3VSENSEA
3VSENSEA
3VSENSEA
12VGATEA
12VGATEA
12VGATEA
12VGATEA
12VGATEB
12VGATEB
12VGATEB
12VGATEB
Pin Name
Pin Name
Pin Name
Pin Name
12VOUTB
12VOUTB
12VOUTB
12VOUTB
3VGATEA
3VGATEA
3VGATEA
3VGATEA
3VGATEB
3VGATEB
3VGATEB
3VGATEB
12VOUTA
12VOUTA
12VOUTA
12VOUTA
3VOUTB
3VOUTB
3VOUTB
3VOUTB
3VOUTA
3VOUTA
3VOUTA
3VOUTA
12VINA
12VINA
12VINA
12VINB
12VINB
12VINB
12VINB
3VINB
3VINB
3VINB
3VINB
3VINA
3VINA
3VINA
3VINA
Pin Function
Pin Function
Pin Function
Pin Function
12V Supply Power and Sense Inputs [A/B]: Two pins are provided for Kelvin.
12V Supply Power and Sense Inputs [A/B]: Two pins are provided for Kelvin.
12V Supply Power and Sense Inputs [A/B]: Two pins are provided for Kelvin.
connection (one for each slot). Pin 5 is the (+) Kelvin-sense connection to
connection (one for each slot). Pin 5 is the (+) Kelvin-sense connection to
connection (one for each slot). Pin 5 is the (+) Kelvin-sense connection to
connection (one for each slot). Pin 5 is the (+) Kelvin-sense connection to
the supply side of the sense resistor for 12V Slot A. Pin 32 is the (+) Kelvin
the supply side of the sense resistor for 12V Slot A. Pin 32 is the (+) Kelvin
the supply side of the sense resistor for 12V Slot A. Pin 32 is the (+) Kelvin
the supply side of the sense resistor for 12V Slot A. Pin 32 is the (+) Kelvin
sense connection to the supply side of the sense resistor for 12V Slot B.
sense connection to the supply side of the sense resistor for 12V Slot B.
sense connection to the supply side of the sense resistor for 12V Slot B.
sense connection to the supply side of the sense resistor for 12V Slot B.
These two pins must ultimately connect to each other as close as possible at
These two pins must ultimately connect to each other as close as possible at
These two pins must ultimately connect to each other as close as possible at
These two pins must ultimately connect to each other as close as possible at
the MIC2592B controller in order to eliminate any IR drop between these
the MIC2592B controller in order to eliminate any IR drop between these
the MIC2592B controller in order to eliminate any IR drop between these
the MIC2592B controller in order to eliminate any IR drop between these
pins. An undervoltage lockout circuit (UVLO) prevents the switches from
pins. An undervoltage lockout circuit (UVLO) prevents the switches from
pins. An undervoltage lockout circuit (UVLO) prevents the switches from
pins. An undervoltage lockout circuit (UVLO) prevents the switches from
turning on while this input is less than its lockout threshold.
turning on while this input is less than its lockout threshold.
turning on while this input is less than its lockout threshold.
turning on while this input is less than its lockout threshold.
3.3V Supply Power and Sense Inputs [A/B]: Two pins are provided for
3.3V Supply Power and Sense Inputs [A/B]: Two pins are provided for
3.3V Supply Power and Sense Inputs [A/B]: Two pins are provided for
3.3V Supply Power and Sense Inputs [A/B]: Two pins are provided for
connection (one for each slot). Pin 12 is the (+) Kelvin-sense connection to
connection (one for each slot). Pin 12 is the (+) Kelvin-sense connection to
connection (one for each slot). Pin 12 is the (+) Kelvin-sense connection to
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
the supply side of the sense resistor for 3V Slot A. Pin 25 is the (+) Kelvin
the supply side of the sense resistor for 3V Slot A. Pin 25 is the (+) Kelvin
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.
sense connection to the supply side of the sense resistor for 3V Slot B.
sense connection to the supply side of the sense resistor for 3V Slot B.
sense connection to the supply side of the sense resistor for 3V Slot B.
These two pins must ultimately connect to each other as close as possible at
These two pins must ultimately connect to each other as close as possible at
These two pins must ultimately connect to each other as close as possible at
These two pins must ultimately connect to each other as close as possible at
the MIC2592B controller in order to eliminate any IR drop between these
the MIC2592B controller in order to eliminate any IR drop between these
the MIC2592B controller in order to eliminate any IR drop between these
the MIC2592B controller in order to eliminate any IR drop between these
pins. An undervoltage lockout circuit (UVLO) prevents the switches from
pins. An undervoltage lockout circuit (UVLO) prevents the switches from
pins. An undervoltage lockout circuit (UVLO) prevents the switches from
pins. An undervoltage lockout circuit (UVLO) prevents the switches from
turning on while this input is less than its lockout threshold.
turning on while this input is less than its lockout threshold.
turning on while this input is less than its lockout threshold.
turning on while this input is less than its lockout threshold.
3.3V Power-Good Sense Inputs: Connect to 3.3V[A/B] outputs. Used to
3.3V Power-Good Sense Inputs: Connect to 3.3V[A/B] outputs. Used to
3.3V Power-Good Sense Inputs: Connect to 3.3V[A/B] outputs. Used to
3.3V Power-Good Sense Inputs: Connect to 3.3V[A/B] outputs. Used to
monitor the 3.3V output voltages for Power-is-Good status.
monitor the 3.3V output voltages for Power-is-Good status.
monitor the 3.3V output voltages for Power-is-Good status.
monitor the 3.3V output voltages for Power-is-Good status.
12V Power-Good Sense Inputs: Connect to 12V[A/B] outputs. Used to
12V Power-Good Sense Inputs: Connect to 12V[A/B] outputs. Used to
12V Power-Good Sense Inputs: Connect to 12V[A/B] outputs. Used to
12V Power-Good Sense Inputs: Connect to 12V[A/B] outputs. Used to
monitor the 12V output voltages for Power-is-Good status.
monitor the 12V output voltages for Power-is-Good status.
monitor the 12V output voltages for Power-is-Good status.
monitor the 12V output voltages for Power-is-Good status.
12V Circuit Breaker Sense Inputs: The current limit thresholds are set
12V Circuit Breaker Sense Inputs: The current limit thresholds are set
12V Circuit Breaker Sense Inputs: The current limit thresholds are set
12V Circuit Breaker Sense Inputs: The current limit thresholds are set
by connecting sense resistors between these pins and 12VIN[A/B]. When
by connecting sense resistors between these pins and 12VIN[A/B]. When
by connecting sense resistors between these pins and 12VIN[A/B]. When
by connecting sense resistors between these pins and 12VIN[A/B]. When
the current limit threshold of IR = 50mV is reached, the 12VGATE[A/B] pin
the current limit threshold of IR = 50mV is reached, the 12VGATE[A/B] pin
the current limit threshold of IR = 50mV is reached, the 12VGATE[A/B] pin
the current limit threshold of IR = 50mV is reached, the 12VGATE[A/B] pin
is modulated to maintain a constant voltage across the sense resistor and
is modulated to maintain a constant voltage across the sense resistor and
is modulated to maintain a constant voltage across the sense resistor and
is modulated to maintain a constant voltage across the sense resistor and
therefore a constant current into the load. If the 50mV threshold is exceeded
therefore a constant current into the load. If the 50mV threshold is exceeded
therefore a constant current into the load. If the 50mV threshold is exceeded
therefore a constant current into the load. If the 50mV threshold is exceeded
for t
for t
for t
for t
supply’s external MOSFET is immediately pulled high.
supply’s external MOSFET is immediately pulled high.
supply’s external MOSFET is immediately pulled high.
supply’s external MOSFET is immediately pulled high.
3V Circuit Breaker Sense Inputs: The current limit thresholds are set by
3V Circuit Breaker Sense Inputs: The current limit thresholds are set by
3V Circuit Breaker Sense Inputs: The current limit thresholds are set by
3V Circuit Breaker Sense Inputs: The current limit thresholds are set by
connecting sense resistors between these pins and 3VIN[A/B]. When the
connecting sense resistors between these pins and 3VIN[A/B]. When the
connecting sense resistors between these pins and 3VIN[A/B]. When the
connecting sense resistors between these pins and 3VIN[A/B]. When the
current limit threshold of IR = 50mV is reached, the 3VGATE[A/B] pin is
current limit threshold of IR = 50mV is reached, the 3VGATE[A/B] pin is
current limit threshold of IR = 50mV is reached, the 3VGATE[A/B] pin is
current limit threshold of IR = 50mV is reached, the 3VGATE[A/B] pin is
modulated to maintain a constant voltage across the sense resistor and
modulated to maintain a constant voltage across the sense resistor and
modulated to maintain a constant voltage across the sense resistor and
modulated to maintain a constant voltage across the sense resistor and
therefore a constant current into the load. If the 50mV threshold is exceeded
therefore a constant current into the load. If the 50mV threshold is exceeded
therefore a constant current into the load. If the 50mV threshold is exceeded
therefore a constant current into the load. If the 50mV threshold is exceeded
for t
for t
for t
for t
supply’s external MOSFET is immediately pulled low.
supply’s external MOSFET is immediately pulled low.
supply’s external MOSFET is immediately pulled low.
supply’s external MOSFET is immediately pulled low.
12V Gate Drive Outputs: Each pin connects to the gate of an external
12V Gate Drive Outputs: Each pin connects to the gate of an external
12V Gate Drive Outputs: Each pin connects to the gate of an external
12V Gate Drive Outputs: Each pin connects to the gate of an external
P-Channel MOSFET. During power-up, the C
P-Channel MOSFET. During power-up, the C
P-Channel MOSFET. During power-up, the C
P-Channel MOSFET. During power-up, the C
MOSFETs are connected to a 25µA current sink. This controls the value of
MOSFETs are connected to a 25µA current sink. This controls the value of
MOSFETs are connected to a 25µA current sink. This controls the value of
MOSFETs are connected to a 25µA current sink. This controls the value of
dv/dt seen at the source of the MOSFETs.
dv/dt seen at the source of the MOSFETs.
dv/dt seen at the source of the MOSFETs.
dv/dt seen at the source of the MOSFETs.
During current limit events, the voltage at this pin is adjusted to maintain
During current limit events, the voltage at this pin is adjusted to maintain
During current limit events, the voltage at this pin is adjusted to maintain
During current limit events, the voltage at this pin is adjusted to maintain
constant current through the switch for a period of t
constant current through the switch for a period of t
constant current through the switch for a period of t
constant current through the switch for a period of t
overcurrent, thermal shutdown, or input undervoltage fault condition occurs,
overcurrent, thermal shutdown, or input undervoltage fault condition occurs,
overcurrent, thermal shutdown, or input undervoltage fault condition occurs,
overcurrent, thermal shutdown, or input undervoltage fault condition occurs,
the GATE pin for the affected slot is immediately brought high. These pins
the GATE pin for the affected slot is immediately brought high. These pins
the GATE pin for the affected slot is immediately brought high. These pins
the GATE pin for the affected slot is immediately brought high. These pins
are charged by an internal current source during power-down. Also, the 3V
are charged by an internal current source during power-down. Also, the 3V
are charged by an internal current source during power-down. Also, the 3V
are charged by an internal current source during power-down. Also, the 3V
supply for the affected slot is shut-down.
supply for the affected slot is shut-down.
supply for the affected slot is shut-down.
supply for the affected slot is shut-down.
3V Gate Drive Outputs: Each pin connects to the gate of an external
3V Gate Drive Outputs: Each pin connects to the gate of an external
3V Gate Drive Outputs: Each pin connects to the gate of an external
3V Gate Drive Outputs: Each pin connects to the gate of an external
N-Channel MOSFET. During power-up, the C
N-Channel MOSFET. During power-up, the C
N-Channel MOSFET. During power-up, the C
N-Channel MOSFET. During power-up, the C
MOSFETs are connected to a 25µA current source. This controls the value
MOSFETs are connected to a 25µA current source. This controls the value
MOSFETs are connected to a 25µA current source. This controls the value
MOSFETs are connected to a 25µA current source. This controls the value
of dv/dt seen at the source of the MOSFETs, and hence the current fl owing
of dv/dt seen at the source of the MOSFETs, and hence the current fl owing
of dv/dt seen at the source of the MOSFETs, and hence the current fl owing
of dv/dt seen at the source of the MOSFETs, and hence the current fl owing
into the load capacitance.
into the load capacitance.
into the load capacitance.
into the load capacitance.
During current limit events, the voltage at this pin is adjusted to maintain
During current limit events, the voltage at this pin is adjusted to maintain
During current limit events, the voltage at this pin is adjusted to maintain
During current limit events, the voltage at this pin is adjusted to maintain
constant current through the switch for a period of t
constant current through the switch for a period of t
constant current through the switch for a period of t
constant current through the switch for a period of t
overcurrent, thermal shutdown, or input undervoltage fault condition occurs,
overcurrent, thermal shutdown, or input undervoltage fault condition occurs,
overcurrent, thermal shutdown, or input undervoltage fault condition occurs,
overcurrent, thermal shutdown, or input undervoltage fault condition occurs,
the GATE pin for the affected slot is immediately brought low. During power-
the GATE pin for the affected slot is immediately brought low. During power-
the GATE pin for the affected slot is immediately brought low. During power-
the GATE pin for the affected slot is immediately brought low. During power-
down, these pins are discharged by an internal current source. Also, the 12V
down, these pins are discharged by an internal current source. Also, the 12V
down, these pins are discharged by an internal current source. Also, the 12V
down, these pins are discharged by an internal current source. Also, the 12V
supply for the affected slot is shut down.
supply for the affected slot is shut down.
supply for the affected slot is shut down.
supply for the affected slot is shut down.
FLT
FLT
FLT
FLT
FLT
FLT
, the circuit breaker is tripped and the GATE pin for the affected 12V
, the circuit breaker is tripped and the GATE pin for the affected 12V
, the circuit breaker is tripped and the GATE pin for the affected 3V
, the circuit breaker is tripped and the GATE pin for the affected 3V
4
GATE
GATE
and the C
and the C
FLT
FLT
FLT
FLT
FLT
FLT
. Whenever an
. Whenever an
. Whenever an
. Whenever an
GS
GS
of the
of the
M9999-033105