LP3971SQ-2G16/NOPB National Semiconductor, LP3971SQ-2G16/NOPB Datasheet - Page 42

• Manufacturer Part Number: LP3971SQ-2G16/NOPB
• Description: IC PMU FOR APPL PROCESSORS 40LLP
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LP3971SQ-2G16/NOPB

• Applications: Processor
• Current - Supply: 60µA
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 40-LLP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LP3971SQ-2G16; LP3971SQ-2G16; LP3971SQ-2G16TR

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THERMAL MANAGEMENT
Application: There is a mode wherein all 6 comparators (flags)
can be turned on via the “enallflags” control register bit. This
mode allows the user to interrogate the device or system
temperature under the set operating conditions. Thus, the
rate of temperature change can also be estimated. The sys-
tem may then negotiate for speed and power trade off, or
deploy cooling maneuvers to optimize system performance.
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The “enallflags” bit needs enabled only when the “bct<2:0>
bits are read to conserve power.
Note: The thermal management flags have been verified
functional. Presently these registers are accessible by factory
only. If there is a demand for this function, the relevant register
controls may be shifted into the user programmable bank; the
temperature range and resolution of these flags, might also
be refined/redefined.