Datasheet

www.ti.com
APPLICATIONCURVES(seeFigure29)
-30
-20
-10
0
10
20
30
40
50
60
70
-90
-60
-30
0
30
60
90
120
150
180
210
G-Gain-dB
Phase-Degrees
f-Frequency-Hz
10 100 1k 100k10k 1M
Gain
Phase
V =12V,
V =3.3V,
I =2.5 A,
f =700kHz
I
O
O
S
-0.15
-0.1
-0.05
0
0.05
0.1
0.15
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
I -OutputCurrent- A
O
LoadRegulation-%
V =6V
I
V =12V
I
V =15V
I
V =17V
I
V =9V
I
-0.15
-0.1
-0.05
0
0.05
0.1
0.15
6 7 8 9 10 11 12 13 14 15 16 17
V -InputVoltage-V
I
OutputRegulation-%
I =0 A
O
I =2.5 A
O
I =5 A
O
SeeFigure17
SeeFigure17
V =2V/div
(PH)
V =7V,V =3.3V,I =5 A,f =700kHz
I O O S
Time-500ns/div
V
=10mV/div(ac)coupled
O
SeeFigure17
V =2V/div
(PH)
V =7V,V =3.3V,I =5 A,f =700kHz
I O O S
Time-500ns/div
V
=100mV/div(ac)coupled
I(Ripple)
75
80
85
90
95
100
0 1 2 3 4 5
I -OutputCurrent- A
O
Efficiency-%
V =6V
I
V =9V
I
V =12V
I
V =15V
I
V =17V
I
V =3.3V,
f =700kHz
O
S
V =5V/div
I
V =2V/div
O
T
ime-5ms/div
V =12V,V =3.3V,
f =700kHz,
SeeFigure17
I O
S
V =50mV/div(ac)coupled
O
I =1 A/div,
1.25 A to3.75 A
Step
O
Time-200 s/divm
TPS54550
SLVS623A–MARCH2006–REVISEDAPRIL2006
LOOPRESPONSELOADREGULATIONLINEREGULATION
Figure30.Figure31.Figure32.
EFFICIENCY
vs
OUTPUTCURRENTINPUTRIPPLEVOLTAGEOUTPUTRIPPLEVOLTAGE
Figure33.Figure34.Figure35.
LOADTRANSIENTRESPONSEPOWERUP
Figure36.Figure37.
24
SubmitDocumentationFeedback