DS3717 Rev 12

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L4979D-E, L4979MD

Electrical specifications

21

2

Electrical specifications

2.1

Absolute maximum ratings

Stressing the device above the ratings listed in Table 3 may cause permanent damage to

the device. These are stress ratings only and operation of the device at these or any other

conditions above those indicated in the operating sections of this specification is not implied.

Exposure to the conditions reported in this section for extended periods may affect device

reliability. Refer also to the STMicroelectronics SURE program and other relevant quality

documents.

Table 3. Absolute maximum ratings

Symbol

Parameter

Value

Unit

Vvsdc

DC supply voltage

-0.3 to 40

V

Ivsdc

Input current

Internally limited

Vvo

DC output voltage

-0.3 to 6 (1)

1. Using the typical application schematic with Cout= 10 µF and Iout=0 A, when the regulator is switched-on,

an overshoot exceeding 6 V could occur.This behavior does not impact the reliability of the regulator.

V

Ivo

DC output current

Internally limited

Vwi

Watchdog input voltage

-0.3 to Vvo +0.3

V

Vod

Open drain output voltage (RES)

-0.3 to Vvo +0.3

V

Iod

Open drain output current (RES)

Internally limited

Vcr

Reset delay voltage

-0.3 to Vvo +0.3

V

Vcw

Watchdog delay voltage

-0.3 to Vvo +0.3

V

Ven

Enable input voltage

-0.3 to 40

V

Tj

Junction temperature

-40 to 150

°C

VESD

ESD voltage level (HBM-MIL STD 883C)

±2

kV

Table 4. Thermal data

Symbol

Parameter

SO8

SO16+2+2

Unit

Rth j-amb

Thermal resistance junction to ambient

130 to 180

50 to 80

°C/W