a5975d STMicroelectronics, a5975d Datasheet - Page 3

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a5975d

Manufacturer Part Number
a5975d
Description
Up To 3 A Step-down Switching Regulator For Automotive Applications
Manufacturer
STMicroelectronics
Datasheet

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A5975D
9
10
11
12
8.1
8.2
8.3
8.4
8.5
8.6
8.7
8.8
8.9
8.10
8.11
8.12
Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Layout considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Thermal considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Synchronization example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
External soft-start network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Component selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
8.3.1
8.3.2
RMS current of the embedded power MOSFET . . . . . . . . . . . . . . . . . . . 32
Short-circuit protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Positive buck-boost regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Negative buck-boost regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Floating boost current generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Compensation network with MLCC at the output . . . . . . . . . . . . . . . . . . . 41
Thermal resistance R
Thermal impedance Z
Doc ID 018760 Rev 1
THJ-A
THJ-A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
(t) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Contents
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