Datasheet

TPS54310-Q1
SGLS280D − JANUARY 2005 − REVISED JUNE 2009
www.ti.com
11
PERFORMANCE GRAPHS
Figure 12
65
70
75
80
85
90
95
100
01234 5
V
I
= 4 V
V
I
= 6 V
I
O
− Output Current − A
Efficiency − %
EFFICIENCY
vs
OUTPUT CURRENT
V
I
= 5 V
Figure 13
3.24
3.26
3.28
3.3
3.32
3.34
3.36
3.38
3.4
012345
I
L
− Load Current − A
− Output Voltage − %
OUTPUT VOLTAGE
vs
LOAD CURRENT
V
O
T
A
= 25°C
V
I
= 5 V
Figure 14
−40
−20
0
20
40
60
100 1 k 10 k 100 k 1 M
−90
−45
0
45
90
135
f − Frequency − Hz
Gain − dB
LOOP RESPONSE
Phase − Degrees
Gain
Phase
T
A
= 25°C
Fi
g
ure 15
V
O
(AC)
10 mV/div
V
I
= 5 V
I
O
= 3 A
400 ns/div
OUTPUT RIPPLE VOLTAGE
Figure 16
V
I
= 5 V
40 µs/div
V
O
(AC)
50 mV/div
LOAD TRANSIENT RESPONSE
I
O
2 A/div
Figure 17
V
I
2 V/div
V
O
2 V/div
V
PWRGD
5 V/div
1 ms/div
SLOW-START TIMING
25
35
45
55
65
75
85
95
105
115
125
01234
− Ambient Temperature −
AMBIENT TEMPERATURE
vs
LOAD CURRENT
I
L
− Load Current − A
C
°
T
A
Safe Operating Area
†
†
The safe operating area is applicable to the test board
conditions listed in the Dissipation Rating Table section of
this data sheet.
Figure 18
V
I
= 3.3 V
V
I
= 5 V