MIC2592B Datasheet, PDF (15/31 Pages) Micrel Semiconductor – Dual-Slot PCI Express Hot-Plug Controller

MIC2592B
Functional Block Diagram
Micrel
12VSENSE[A/B]
12VIN[A/B]
3VSENSE[A/B]
3VIN[A/B]
50mV
50mV
ON[A/B] AUX[A/B]
Power-on
Reset
250s
ON/OFF
12V
UVLO
VSTBY
UVLO
Bandgap
Reference
V_REF
VSTBY[A/B]
12VIN[A/B]
VAUX Charge
Pump &
MOSFET
VAUX
Overcurrent
3VIN[A/B]
12V_BIAS
12VGATE[A/B]
VAUX[A/B]
3VGATE[A/B]
CFILTER[A/B]
100mV*
100mV*
ON/OFF
Overcurrent Detection
V_STBY(REF)
I_REF
Current Mirror
3V
UVLO
ON/OFF
ON/OFF
Thermal
Shutdown
Logic Circuits
VAUX
PWRGD
V_REF
DIGITAL CORE/SERIAL INTERFACE
RFILTER[A&B]
/FORCE_ON[A/B]
GPI_[A0/B0]
RFILTER[A&B]
OPEN PIN
DETECTOR
V_STBY(REF)
40k  3
* MIC2592B-3BTQ fast threshold is 150mV
MIC2592B-5BTQ fast threshold is disabled
Contact factory for availabilty
SCL SDA
MIC2592B Block Diagram
A2 A1 A0
/PWRGD[A/B]
/FAULT[A/B]
12VPWRGD
V_REF
3VPWRGD
V_REF
12VOUT[A/B]
3VOUT[A/B]
/INT
GND
March 2005
15
M9999-033105