L6986H datasheet(64/68 Pages) STMICROELECTRONICS

64 / 68 page

Closing the loop ..................................................................35

5.1

GCO(s) control to output transfer function ......................................... 35

5.2

Error amplifier compensation network ............................................ 36

5.3

Voltage divider ................................................................ 37

5.4

Total loop gain ................................................................ 38

5.5

Compensation network design .................................................. 39

Application notes .................................................................41

6.1

Output voltage adjustment ...................................................... 41

6.2

Switching frequency ........................................................... 41

6.3

MLF pin ..................................................................... 41

6.4

Voltage supervisor............................................................. 41

6.5

Synchronization (LNM) ......................................................... 43

6.5.1

Embedded master - slave synchronization .................................... 43

6.5.2

External synchronization signal............................................. 45

6.6

Design of the power components ................................................ 48

6.6.1

Input capacitor selection .................................................. 48

6.6.2

Inductor selection ....................................................... 49

6.6.3

Output capacitor selection................................................. 49

6.7

Application board.............................................................. 50

6.8

Efficency curves .............................................................. 55

Package information..............................................................59

7.1

HTSSOP16 package information ................................................ 59

Ordering information .............................................................61

Revision history .......................................................................62

L6986H

Contents

DS12905 - Rev 2

page 64/68

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