TPS54310-EP
www.ti.com ..................................................................................................................................................................................................... SLVS818–APRIL 2008
TYPICAL CHARACTERISTICS
DRAIN-SOURCE ON-STATE
RESISTANCE
DRAIN-SOURCE ON-STATE
RESISTANCE
INTERNALLY SET OSCILLATOR
FREQUENCY
vs
vs
vs
JUNCTION TEMPERATURE
JUNCTION TEMPERATURE
JUNCTION TEMPERATURE
120
100
80
100
80
60
40
20
0
750
650
550
450
V = 3.3 V
I
V = 5 V
I
I
= 3 A
O
I
= 3 A
O
SYNC ≥ 2.5 V
60
SYNC ≤ 0.8 V
40
350
250
20
0
−40
0
25
85
125
−40
0
25
85
125
−40
0
25
85
125
T
J
− Junction Temperature − °C
T
J
− Junction Temperature − °C
T
J
− Junction Temperature − °C
Figure 1.
Figure 2.
Figure 3.
EXTERNALLY SET OSCILLATOR
FREQUENCY
VOLTAGE REFERENCE
vs
OUTPUT VOLTAGE REGULATION
vs
vs
JUNCTION TEMPERATURE
JUNCTION TEMPERATURE
INPUT VOLTAGE
0.895
0.8950
0.8930
0.8910
0.8890
800
T
A
= 85°C
RT = 68 k
RT = 100 k
RT = 180 k
700
600
500
400
0.893
0.891
0.889
f = 350 kHz
0.8870
0.8850
0.887
0.885
300
200
−40
0
25
85
125
−40
0
25
85
125
3
4
5
6
T
J
− Junction Temperature − °C
V − Input Voltage − V
I
T
J
− Junction Temperature − °C
Figure 4.
Figure 5.
Figure 6.
INTERNAL SLOW-START TIME
vs
JUNCTION TEMPERATURE
DEVICE POWER LOSSES
vs
ERROR AMPLIFIER
OPEN LOOP RESPONSE
LOAD CURRENT
0
2.25
2
3.80
3.65
3.50
3.35
3.20
3.05
140
120
100
80
R = 10 kΩ,
L
T
− 125°C
J
−20
−40
−60
−80
C
T
= 160 pF,
= 25°C
L
f
= 700 kHz
s
A
1.75
1.5
V = 3.3 V
I
Phase
1.25
−100
−120
60
1
40
20
V = 5 V
I
Gain
0.75
−140
−160
0.5
0
2.90
2.75
−180
−200
0.25
−20
0
0
0
10
100 1 k 10 k 100 k 1 M 10 M
−40
0
25
85
125
1
2
3
4
f − Frequency − Hz
T
J
− Junction Temperature − °C
I
− Load Current − A
L
Figure 7.
Figure 8.
Figure 9.
Copyright © 2008, Texas Instruments Incorporated
Submit Documentation Feedback
7
Product Folder Link(s): TPS54310-EP
TI [ TEXAS INSTRUMENTS ]
