L4993 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

L4993

Low drop voltage regulator

STMicroelectronics 

L4993

4.2

SO-20 thermal data

Figure 32. SO-20 PC board

Package and PCB thermal data

Note:

Layout condition of Rth and Zth measurements (PCB FR4 area= 58mm x 58mm,PCB

thickness = 2mm, Cu thickness=35µm , Copper areas: from minimum pad lay-out to 6cm2).

Figure 33. Rthj-amb Vs. PCB copper area in open box free air condition

70

68

66

64

62

60

58

56

54

52

50

0

1

2

3

4

5

6

7

PCB Cu heatsink area (cm^2)

21/30

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