STPM066S datasheet(23/67 Pages) STMICROELECTRONICS

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In order to provide an advanced on-chip temperature control, power outputs are grouped in 4 clusters with

dedicated thermal sensors. The sensors are suitably located on the device. In case the temperature of a cluster

reaches the thermal shutdown threshold, the outputs assigned to this cluster are shut down (all other outputs

remain active). The central cluster only asserts the FAULT pin. Each output cluster has a dedicated temperature

warning and shutdown flag and the cluster temperature can be read out by SPI.

Next table shows voltages referred to ground and currents are assumed positive when the current flows into the

pin. Tj = -40 °C to 130 °C.

Table 8. Temperature diode characteristics

Symbol

Parameter

Test condition

Min. Typ. Max. Unit

VTROOM1-4 TSENSE output voltage at 25 °C

T = 25 °C

1.335

TCTSENSE1-4 Temperature coefficient for TSENSE output voltage

T = 25 °C; T = 130 °C;

T = -40 °C

-4

mV/K

Figure 12. VTSENSE vs. temperature

1.7

1.6

1.5

1.4

1.3

1.2

1.1

1.0

0.9

Temperature (°C)

0.8

0.7

0.6

-40

-20

100

120

140

160

180

V(TSENSE), MAX.

V(TSENSE), MIN.

V(TSENSE), TYP.

GADG1405181318PS

Cluster temperatures information is available in the SPI registers and can be calculated from the binary coded

Decimal=VTSENSE× 1024

VREFADC −1

(1)

VTSENSE=VTROOM+ Tj−25 ×TCTSENSE

(2)

Starting from the following values:

Decimal= 358.26−Tj

0.488

(3)

Tj=358.26−Decimal×0.488

(4)

We can get this information:

T = -40 °C → decimal code is 816 (0x330, read out from SPI register)

T = 25 °C → decimal code is 683 (0x2AB, read out from SPI register)

Read out SPI register 0x330, means the decimal is 816 → T = -40 °C

Read out SPI register 0x2AB, means the decimal is 683 → T = 25 °C

STPM066S

Voltage regulators and features description

DS12976 - Rev 2

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