Datasheet

0
20
40
60
80
100
120
−40 0 25 85 125
V
I
=3.3V
T
J
− JunctionTemperature − °C
Drain-SourceOn-StateResistance − mW
0
20
40
60
80
100
−40 0 25 85 125
V
I
=5V
T
J
− JunctionTemperature − °C
Drain-SourceOn-StateResistance − mW
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
0.889
−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
1050
−40 0 25
f − ExternallySetOscillatorFrequency − kHz
1100
1200
85 125
1150
1000
T − JunctionT
J
emperature − C
o
RT=43kW
450
500
−40 0 25
f − ExternallySetOscillatorFrequency − kHz
600
85 125
550
400
T − JunctionT
J
emperature − C
o
RT=100kW
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
0.2
0.4
0.6
0.8
1
1.2
0
1
1.5
2
2.50.5 3
I − OutputCurrent − A
O
DevicePowerLosses − W
T =25 C,
A
o
f =700kHz,
V =5V,
V =3.3V
s
I
O
TPS54317
www.ti.com ..................................................................................................................................... SLVS619B –NOVEMBER 2005–REVISED SEPTEMBER 2009
TYPICAL CHARACTERISTICS
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 EXTERNALLY SET OSCILLATOR
FREQUENCY FREQUENCY VOLTAGE REFERENCE
vs vs vs
JUNCTION TEMPERATURE JUNCTION TEMPERATURE JUNCTION TEMPERATURE
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.
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