L9779WD datasheet(20/170 Pages) STMICROELECTRONICS

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L9779WD

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DocID027452 Rev 5

5.2

Latch-up test

According to JEDEC 78 class 2 level A.

5.3

Temperature ranges and thermal data

5.4

Operating range

5.4.1

Low battery

All the functions are guaranteed with degraded parameters. The voltage regulators follow

VB in RDSon mode with drop-out depending on load current.

V3V3 regulator works as expected assuming VDD5 > 4 V.

5.4.2

Normal battery

All the functions and the parameters are guaranteed by testing coverage.

5.4.3

High battery

All the functions are guaranteed with degraded parameters.

5.4.4

Load dump

The device is switched-off if load dump exceeds battery overvoltage threshold for a time

longer than filter time.

Table 5. Temperature ranges and thermal data

Symbol

Parameter

Min

Max

Unit

Tamb

Operating temperature

-40

125

°C

Continuative operative junction temperature

-40

150

°C

Tstg

Storage temperature

-40

150

°C

Rthj-case Thermal resistance junction-to-case

°C/W

Rthj-amb Thermal resistance junction-to-ambient(1)

1. With 2S2P+vias PCB.

-16

°C/W

Lead temperature during soldering (for a time = 10 s max)

260

°C

Table 6. Operating range

Pins

symbol

Battery voltage range

Junction temperature

condition

Note

4.15 V < Vb < 6 V

-40 < Tj < 40

Low battery

6 V < Vb = 18 V

-40 < Tj < 150

Normal battery

18 V < Vb = 28 V

-40 < Tj < 40

High battery

28 < Vb = 40 V, trise = 10ms, Tpulse= 400 ms.

-40 < Tj < 40

Load dump

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