Datasheet
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TYPICAL CHARACTERISTICS
450
−40 0 25
f − Internally Set Oscillator Frequency −kHz
550
750
85 125
650
350
250
T
J
− Junction Temperature − °C
SYNC ≥ 2.5 V
SYNC ≤ 0.8 V
0
20
40
60
80
100
120
−40 0 25 85 125
I
O
= 3 A
V
I
= 3.3 V
T
J
− Junction Temperature − °C
Drain-Source On-State Resistance − Ω
0
20
40
60
80
100
−40 0 25 85 125
I
O
= 3 A
V
I
= 5 V
T
J
− Junction Temperature − °C
Drain-Source On-State Resistance − Ω
0.889
−40 0 25
− Voltage Reference − V
0.895
85 125
0.893
0.887
0.885
T
J
− Junction Temperature − °C
0.891
V
ref
0.8850
0.8870
0.8890
0.8910
0.8930
0.8950
3 4 5 6
f = 350 kHz
T
A
= 85°C
V
I
− Input Voltage − V
− Output Voltage Regulation − VV
O
400
−40 0 25
f − Externally Set Oscillator Frequency − kHz
500
800
85 125
700
300
200
T
J
− Junction Temperature − °C
600
RT = 68 k
RT = 100 k
RT = 180 k
f − Frequency − Hz
60
40
0
0 10 100 1 k 10 k 100 k 1 M
Gain − dB
80
100
140
10 M
120
20
−20
Phase − Degrees
0
−20
−40
−60
−80
−100
−120
−140
−160
−180
−200
R
L
= 10 kΩ,
C
L
= 160 pF,
T
A
= 25°C
Phase
Gain
T
J
− Junction Temperature − °C
3.35
3.20
2.90
−40 0 25 85
Internal Slow-Start Time − ms
3.50
3.65
125
3.80
3.05
2.75
0
0.25
0.5
0.75
1
1.25
1.5
1.75
2
2.25
0 1 2 3 4
I
L
− Load Current − A
Device Power Losses − W
T
J
− 125°C
f
s
= 700 kHz
V
I
= 3.3 V
V
I
= 5 V
TPS54310
SLVS412D – DECEMBER 2001 – REVISED FEBRUARY 2007
DRAIN-SOURCE ON-STATE DRAIN-SOURCE ON-STATE INTERNALLY SET OSCILLATOR
RESISTANCE RESISTANCE FREQUENCY
vs vs vs
JUNCTION TEMPERATURE JUNCTION TEMPERATURE JUNCTION TEMPERATURE
Figure 1. Figure 2. Figure 3.
EXTERNALLY SET OSCILLATOR
FREQUENCY VOLTAGE REFERENCE OUTPUT VOLTAGE REGULATION
vs vs vs
JUNCTION TEMPERATURE JUNCTION TEMPERATURE INPUT VOLTAGE
Figure 4. Figure 5. Figure 6.
INTERNAL SLOW-START TIME DEVICE POWER LOSSES
ERROR AMPLIFIER vs vs
OPEN LOOP RESPONSE JUNCTION TEMPERATURE LOAD CURRENT
Figure 7. Figure 8. Figure 9.
7
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