PC82573V Intel, PC82573V Datasheet - Page 19

• Manufacturer Part Number: PC82573V
• Manufacturer: Intel

Specifications of PC82573V

• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 196
• Lead Free Status / RoHS Status: Compliant

Datasheet—82573
Table 5.
3.3.2
3.3.2.1
Power Sequencing with External Regulators
External LVR Power Up Sequencing and Tracking
1.2V External Supply Voltage Ramp and Sequencing Recommendations
1. Good design practices achieve voltage ramps to within the regulation bands in approximately 20 ms or less.
2. Excessive overshoot can affect long term reliability.
3. Tantalum capacitors must not be used.
The following power-on and power-off sequence should be applied when external power
supplies are in use. Designs must comply with the required power sequence to avoid
risk of either latch-up or forward biased internal diodes.
Generally, the 82573 power sequencing should power up the three power rails in the
following order: 3.3V
there are specific requirements that must be adhered to. These requirements are listed
in the following two subsections.
Sequencing of the external supplies during power up might be necessary to ensure that
the 82573 is not electrically overstressed and does not latch-up. These requirements
are shown in
The 82573 core voltage (1.2V) cannot exceed the 3.3V supply by more than 0.5 V at
any time during the power up. The 82573 core voltage (1.2V) cannot exceed the 2.5V
supply by more than 0.5 V at any time during the power up. The core voltage is not
required to begin ramping before the 3.3V or the 2.5V supply.
The 82573 analog voltage (2.5V) can not exceed the 3.3V supply by more than 0.5 V at
any time during the power up. The analog voltage is not required to begin ramping
before the 3.3V supply.
Rise Time
Monotonicity
Slope
Operational Range
Operational Range
Ripple
Undershoot
Overshoot
Output
Capacitance
Input Capacitance
Capacitance ESR
I
CTRL
Parameter
Figure
Rise time from 10% to 90%
Voltage dip allowed in ramp
Ramp rate at any time between 10% to 90%
Minimum = (0.8 * Vmin) / (Maximum Rise Time)
Maximum = (0.8 * Vmax) / (Minimum Rise Time)
Voltage range for normal operating conditions
Voltage range for normal operating conditions
Maximum voltage ripple at a bandwidth of 50 MHz
Maximum voltage allowed will not exceed 10% of
nominal supply
Maximum voltage allowed
Capacitance range when using a PNP circuit
Capacitance range when using a PNP circuit
Equivalent series resistance of output capacitance
Maximum output current rating with respect to
CTRL_12
2.
2.5V
1.2V. However, if this general guideline is not followed,
Description
2
3
1.5
1.14
Min
4.7
4.7
-5
1
1500
Max
1.26
120
500
+5
60
25
10
20
mV
mV/ms
Unit
mV
mV
mΩ
mA
ms
µF
µF
%
V
pk-pk
19