Datasheet

www.ti.com
+
–
+
–
8 V/V
10 MΩ
+
–
+
–
10 MΩ
20 V/V
50 pF
–
+
10 MΩ
50 µA/V
REF
R
(switch)
40 mΩ
PH
R
dc
L
O
VSENSE
R1
R5
C8
ESR
C
O
a
R3
C6
C7
COMP
c
R2
R
L
1 mV
b
TPS54550
0.891
+
DESIGNPROCEDURE
TPS54550
SLVS623A–MARCH2006–REVISEDAPRIL2006
Figure28.ModelofControlLoop
Figure29.ApplicationCircuit,3.3VOutput
Figure29showstheschematicforatypical
TPS54550application.TheTPS54550canprovide
Thefollowingdesignprocedurecanbeusedto
upto5-Aoutputcurrentatanominaloutputvoltage
selectcomponentvaluesfortheTPS54550.
of3.3V.Forproperthermalperformance,the
Alternately,theSWIFTDesignerSoftwaremaybe
exposedPowerPADunderneaththedevicemustbe
usedtogenerateacompletedesign.TheSWIFT
soldereddowntotheprintedcircuitboard.
DesignerSoftwareusesaniterativedesign
procedureandaccessesacomprehensivedatabase
ofcomponentswhengeneratingadesign.This
sectionpresentsasimplifieddiscussionofthedesign
process.
Tobeginthedesignprocessafewparametersmust
bedecidedupon.Thedesignerneedstoknowthe
following:
blank
18
SubmitDocumentationFeedback