L99H92 datasheet(28/77 Pages) STMICROELECTRONICS

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5.3

Thermal data

Table 19. Thermal operating range

Item

Symbol

Parameter

Value

Unit

5.3.1

Operating junction temperature

-40 to 150

°C

5.3.2

Tstg

Storage temperature

-55 to 150

°C

Table 20. Temperature warning and thermal shutdown

Item

Symbol

Parameter

Min.

Typ.

Max.

Unit

5.3.3

TjTW_ON

Junction

temperature

thermal warning

threshold

TJ increasing

140

150

165

°C

5.3.4

TjTW_OFF

TJ decreasing

135

145

160

°C

5.3.5

TjSD_ON

Junction

temperature

thermal shutdown

threshold

TJ increasing

170

180

190

°C

5.3.6

TjSD_OFF

TJ decreasing

160

170

185

°C

5.3.7

tfTjTW/TSD

Temperature

warning/ shutdown

filtering time

Tested by scan

µs

Note:

Those parameters are guaranteed at hot only

Table 21. Packages thermal resistance

Item

Symbol

Parameter

Value

Unit

QFN32

TQFP32

5.3.8

Rthj-amb(1)(2)

Thermal resistance junction ambient

28.5

°C/W

5.3.9

Rthj-case(3)

Thermal resistance junction to case

7.5

5.0

°C/W

1. The parameter is retrieved according to JEDEC 51.2 referring to thermal testing method in still air .

2. PCB designed according to JEDEC 51.7 referring to high effective thermal conductivity test board. The values quoted are

for PCB 129 mm x 60 mm x 1.6 mm, FR4, 4 layers; Copper thickness 0.070 mm, thermal vias separation 1.2 mm, Thermal

via diameter 0.3 mm +/- 0.08 mm, Cu thickness on vias 0.025 mm. QFN32 footprint dimensions are 3.5 mm x 3.5 mm.

TQFP32 footprint dimensions are 5 mm x 5 mm.

3. The Rthj-case is retrieved according to MIL-STD-883E referring to thermal testing method.

5.4

Electrical characteristics

For an efficient and easy tracking, numbering has been added to each electrical parameter.

Device features are split into categories (see Table 22), and each of them is represented by a letter (A, B, C, etc.);

all parameters are completely identified by a letter and a three-digit number (for example, B.125, C.096…) for

their whole lifetime.

New inserted parameters continue with the numbering of the related category, no matter of where they are

placed.

To facilitate insertion, the last number inserted for each category is also reported in the second column of the

table.

Table 22. Electrical parameters numbering

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