Voltage Regulator Module (VRM) and Enterprise Voltage Regulator-Down (EVRD) 10.0 Design Guidelines

VRM and EVRD 10.0 Design Guidelines

5 Processor Voltage Output

Protection

These are features built into the VRM/EVRD to help prevent damage to itself, the processor, or

other system components.

5.1 Over-Voltage Protection (OVP) PROPOSED

The OVP circuit monitors the processor core voltage (Vcc) for an over-voltage condition. If the

output is more than 200 mV above the VID level, the VRM/EVRD shuts off the output.

5.2 Over-Current Protection (OCP) PROPOSED

The VRM/EVRD should be capable of withstanding a continuous, abnormally low resistance on

the output without damage or over-stress to the unit. Output current under this condition will be

limited to no more than 120% of the maximum rated output of the voltage regulator at thermal

equilibrium.