Datasheet

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TYPICAL CHARACTERISTICS
0
20
40
60
80
100
120
−40 0 25 85 125
VIN = 3.3 V
I
O
= 3 A
Drain Source On-State Reststance − m
Ω
T
J
− Junction Temperature − °C
250
350
450
550
650
750
−40 0 25 85 125
T
J
− Junction Temperature − °C
f − Internally Set Oscillator Frequency − kHz
RT = Open
0
10
20
30
40
50
60
70
80
90
−40 0 25 85 125
VIN = 5 V
I
O
= 3 A
T
J
− Junction Temperature − °C
Drain Source On-State Reststance − m
Ω
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
200
300
400
500
600
700
800
−40 0 25 85 125
T
J
− Junction Temperature − °C
f − Externally Set Oscillator Frequency − kHz
RT = 68 kΩ
RT = 100 kΩ
RT = 180 kΩ
2.75
2.90
3.05
3.20
3.35
3.50
3.65
−40 0 25 85 125
T
J
− Junction Temperature − °C
Internal Slow-Start Time − ms
3.80
−20
0
20
40
60
80
100
120
140
1 100 1 k 1 M
−200
−180
−160
−140
−120
−100
−80
−60
−40
−20
0
10 10 k 100 k 10 M
f − Frequency − Hz
Gain − dB
Phase − Degrees
Phase
Gain
R
L
= 10 kΩ,
C
L
= 160 pF,
T
A
= 25°C
TPS54372
SLVS430D – JUNE 2002 – REVISED FEBRUARY 2005
DRAIN-SOURCE DRAIN-SOURCE INTERNALLY SET
ON-STATE RESISTANCE ON-STATE RESISTANCE OCILLATOR FREQUENCY
vs vs vs
JUNCTION TEMPERATURE JUNCTION TEMPERATURE JUNCTION TEMPERATURE
Figure 1. Figure 2. Figure 3.
EXTERNALLY SET
OCILLATOR FREQUENCY DEVICE POWER LOSSES INTERNAL SLOW-START TIME
vs vs vs
JUNCTION TEMPERATURE LOAD CURRENT JUNCTION TEMPERATURE
Figure 4. Figure 5. Figure 6.
ERROR AMPLIFIER
OPEN-LOOP RESPONSE
Figure 7.
7