L4979MD Datasheet L4979DTR-E, L4979MD, L4979D013TR | P13-P15

L4979D, L4979MD Package and PCB thermal data

Doc ID 10262 Rev 9 13/22

Figure 7. SO-8 thermal impedance junction ambient single pulse

Equation 1: pulse calculation formula

where  = t

Figure 8. Thermal fitting model of V

reg

in SO-8

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Package and PCB thermal data L4979D, L4979MD

14/22 Doc ID 10262 Rev 9

4.2 SO-20 thermal data

Figure 9. SO-20 PC board

1. Layout condition of R

and Z

measurements (PCB: FR4 area = 58 mm x 58 mm, PCB thickness = 2 mm,

Cu thickness = 35 mm, Copper areas: from minimum pad lay-out to 6cm

Table 11. SO-8 thermal parameter

Area (cm

)Footprint2

R1 (°C/W) 4

R2 (°C/W) 2

R3 (°C/W) 2

R4 (°C/W) 41

R5 (°C/W) 40

R6 (°C/W) 58 40

C1 (W.s/°C) 0.0003

C2 (W.s/°C) 0.0025

C3 (W.s/°C) 0.03

C4 (W.s/°C) 0.04

C5 (W.s/°C) 0.1

C6 (W.s/°C) 1.05 2

*$3*&)7

L4979D, L4979MD Package and PCB thermal data

Doc ID 10262 Rev 9 15/22

Figure 10. R

thj-amb

vs PCB copper area in open box free air condition

Figure 11. SO-20 thermal impedance junction ambient single pulse

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P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P18 P19-P21 P22-P22

L4979MD

Mfr. #:

Buy L4979MD

Manufacturer:

STMicroelectronics

Description:

LDO Voltage Regulators 5.0 Volt 0.5 Amp

Lifecycle:

New from this manufacturer.

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L4979MD

L4979MD

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