Datasheet

−60
−20
−40
−50
−10
−30
0
20
10
40
30
50
60
10 100
1k
10k 100k
1M
−180
−120
−60
0
60
120
180
f − Frequency − Hz
Gain − dB
Phase − Degrees
Phase
GAIN
80
0 0.5
1
1.5
2
2.5
Efficiency − %
85
100
3 3.5
90
95
75
I − OutputCurrent
O
− A
V =3V
I
V =6V
I
V =5V
I
V =4V
I
-0.2
0 0.5
1
1.5
2
2.5
OutputRegulation − %
-0.1
0.3
3
0.1
0
0.2
-0.3
I − OutputCurrent
O
− A
1ms/div
V =20mV/div
(ACCoupled)
O
I =1 A/div
0.75 A to2.25 A /step
O
V =1V/div
I
V =1V/div
O
500ms/div
V =10mV/div
(ACCoupled)
O
PH=2V/div
500ns/div
V =50mV/div
(ACCoupled)
I
PH=2V/div
500ns/div
-0.2
3
4
5
OutputRegulation − %
-0.1
0.3
6
0.1
0
0.2
-0.3
V − InputVoltage
I
− V
I =0 A
O
I =1.5 A
O
I =3 A
O
0
10
20
30
50
40
60
80
70
90
100
120
110
130
0 0.5
1
1.5
2
2.5 3
− AmbientT
emperature −
I
L
− LoadCurrent − A
C
°
T
A
SafeOperating Area †
† Safe tothetest
boardconditionslistedinthedissipation
ratingtablesectionofthisdatasheet.
operatingareaisapplicable
f =700kHz
V =5V
V =3.3V
T =125 C
s
I
O
J
o
TPS54317
www.ti.com ..................................................................................................................................... SLVS619B –NOVEMBER 2005–REVISED SEPTEMBER 2009
PERFORMANCE GRAPHS
T
A
= 25°C, f
s
= 1.1 MHz, V
I
= 3.3 V, V
O
= 1.8 V (unless otherwise specified)
EFFICIENCY OUTPUT VOLTAGE
vs vs
OUTPUT CURRENT OUTPUT CURRENT LOOP RESPONSE
Figure 13. Figure 14. Figure 15.
OUTPUT RIPPLE VOLTAGE LOAD TRANSIENT RESPONSE SLOW-START TIMING
Figure 16. Figure 17. Figure 18.
AMBIENT TEMPERATURE LINE REGULATION
vs vs
LOAD CURRENT INPUT RIPPLE VOLTAGE INPUT VOLTAGE
Figure 19. Figure 20. Figure 21.
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