L9966 datasheet(11/122 Pages) STMICROELECTRONICS

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5.5

Temperature ranges and thermal data

Table 6. Temperature ranges and thermal data

Symbol

Parameter

Test condition

Min

Typ

Max

Unit

Notes

Tj (1)

Operating junction

temperature

–

-40

–

150

°C

–

Tstg

Storage temperature

–

-55

150

°C

–

RTh j-a (2)

Thermal resistance

junction-to-ambient

–

°C/W

Homogeneous internal

power distribution (3)

RTh j-cb (2)

Thermal resistance

junction-to-case-bottom

–

°C/W

Homogeneous internal

power distribution

1. All parameters are guaranteed, and tested, in the temperature range Tj -40 to 150 °C unless otherwise

specified.

2. Not subject to production test, guaranteed by design.

3. RTh j-a value is retrieved according to Jedec JESD51-2,-5,-7 guideline with a 2s2p board.

Figure 4. 2s2p PCB with thermal vias

GADG2702170724PS

2s2p PCB + vias

ΘJ-A (2s2p)

Note:

In “2s2p”, the “s” suffix stands for “Signal” and the number before indicates how many PCB layers are dedicated

to signal wires. The “p” suffix stands for “Power” and the number before indicates how many PCB layers are

dedicated to power planes.

L9966

Temperature ranges and thermal data

DS12459 - Rev 10

page 11/122

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