KC80526LY400128 Intel, KC80526LY400128 Datasheet - Page 33

• Manufacturer Part Number: KC80526LY400128
• Manufacturer: Intel

Specifications of KC80526LY400128

• Operating Temperature (min): 0C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Not Compliant

Figure 9 shows a SPICE simulation of the circuit in Figure 8.
To increase the reliability of the Tantalum capacitors, use a
slew-rate control circuit as described in Figure 8 and voltage
derate the capacitor about 50 percent. For example, for a
maximum input voltage of 18 volts, use a 35-volt, low ESR
capacitor with high ripple current capability. Place five, 22-
microfarad/35-volt capacitors on the baseboard directly at
the V_DC pins of the connector.The slew-rate control circuit
should also be applied to every input power source to the
4.7.4.2
The circuit shown in Figure 8 provides an undervoltage
protection and locks out the applied voltage to module to
prevent an accidental turn-on at low voltage. The output of
this circuit, pin 1 of the LM339 comparator, is an open-
collector output. It is low when the applied voltage at PWR is
Undervoltage Lockout: Circuit Description
(V_uv_lockout)
Figure 9. Spice Simulation Using In-rush Protection (Example Only)
V_uv_lockout
V_uv_lockout
Vref 1
.
=
4.757 volts
system V_DC to provide the most protection. If all power is
logically “OR’ed” together at the PWR node, there is still a
potential problem. For example, if a 3X3 Li-Ion battery pack
is powering the system (12 volts at PWR), and the AC
Adaptor (18 volts) is plugged into the system, it will
immediately source current to the PWR node and V_DC
rapidly. This is because the slew-rate control is already ON.
Therefore, the slew-rate control must be applied to every
input power source to provide the most protection.
less than 4.75 volts. This voltage can be calculated with the
following equation with the voltage across D7 as 2.5 volts
(D7 is a 2.5-volt reference generator).
Intel Celeron
R18 R25
R18 R25
R17
At 400 MHz, 366 MHz, 333 MHz, and 300 MHz
.
Processor Mobile Module MMC-1
33