MCP19110 Datasheet, PDF (123/226 Pages) Microchip Technology – Digitally Enhanced Power Analog Controller with Integrated Synchronous Driver

21.0 INTERNAL TEMPERATURE
INDICATOR MODULE
The MCP19110/11 is equipped with a temperature
circuit designed to measure the operating temperature
of the silicon die. The circuit's range of the operating
temperature falls between -40°C and +125°C. The
output is a voltage that is proportional to the device
temperature. The output of the temperature indicator is
internally connected to the device ADC.
21.1 Circuit Operation
The TMPSEN bit in the ABECON register,
Register 6-15, is set to enable the internal temperature
measurement circuit. The MCP19110/11 overtempera-
ture shutdown feature is NOT controlled by this bit.
FIGURE 21-1:
V_DD
TEMPERATURE CIRCUIT
DIAGRAM
TMPSEN
MCP19110/11
21.2 Temperature Output
The output of the circuit is measured using the internal
analog-to-digital converter. Channel 10 is reserved for
the temperature circuit output. Refer to Section 22.0
“Analog-to-Digital Converter (ADC) Module” for
detailed information.
The temperature of the silicon die can be calculated by
the ADC measurement by using Equation 21-1.
EQUATION 21-1: SILICON DIE
TEMPERATURE
TEMP_DIE= -A----D----C------R-1---3-E--.--3A---m-D---V-I---N/---_-G-C-----^–----1---.--7---5-
V_OUT
ADC
MUX
ADC
n
CHS bits
(ADCON0 register)
 2013 Microchip Technology Inc.
DS20002331B-page 123