MIC2591B MICREL [Micrel Semiconductor], MIC2591B Datasheet - Page 16

• Manufacturer Part Number: MIC2591B
• Description: Dual-Slot PCI Express Hot-Plug Controller
• Manufacturer: MICREL [Micrel Semiconductor]

/FORCE_ON[A/B]
Function Block Diagram
March 2005
12VSENSE[A/B]
3VSENSE[A/B]
RFILTER[A&B]
CFILTER[A/B]
GPI_[A0/B0]
12VIN[A/B]
3VIN[A/B]
GND
* MIC2591B-3BTQ fast threshold is 150mV
MIC2591B-5BTQ fast threshold is disabled
Contact factory for availabilty
100mV*
100mV*
50mV
50mV
V
Overcurrent Detection
STBY(REF)
Current Mirror
I
REF
ON/OFF
ON/OFF
V
RFILTER[A&B]
REF
ON[A/B] AUX[A/B]
DETECTOR
OPEN PIN
UVLO
12V
MIC2591B Block Diagram
Power-on
250s
UVLO
Reset
3V
ON/OFF
DIGITAL CORE/SERIAL INTERFACE
SCL
16
Reference
Bandgap
VSTBY
V
UVLO
SDA
REF
12 Channel, 8-bit
A/D Converter
Logic Circuits
MUX &
VSTBY[A/B]
Overcurrent
Shutdown
A2
VAUX
Thermal
A1
PWRGD
VAUX
VAUX Charge
MOSFET
A0
Pump &
ON/OFF
12VIN[A/B]
3VIN[A/B]
12V
FULL-SCALE
REFERENCE
CURRENT
BIAS
VAUX
40k  3
12VPWRGD
3VPWRGD
V
STBY(REF)
V
V
REF
REF
M9999-033105
12VGATE[A/B]
VAUX[A/B]
3VGATE[A/B]
/PWRGD[A/B]
/FAULT[A/B]
3VOUT[A/B]
12VOUT[A/B]
/INT
IREF