Datasheet


SLVS397C − JULY 2001 − REVISED FEBRUARY 2005
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7
TYPICAL CHARACTERISTICS
Figure 1
0
10
20
30
40
50
60
−40 0 25 85 125
VIN = 3.3 V
I
O
= 6 A
I
O
= 3 A
Drain Source On-State Resistance − m
DRAIN-SOURCE
ON-STATE RESISTANCE
vs
JUNCTION TEMPERATURE
Ω
T
J
− Junction Temperature − °C
Figure 2
0
10
20
30
40
50
60
−40 0 25 85 125
VIN = 5 V
I
O
= 6 A
I
O
= 3 A
DRAIN-SOURCE
ON-STATE RESISTANCE
vs
JUNCTION TEMPERATURE
T
J
− Junction Temperature − °C
Drain Source On-State Resistance − m
Ω
Figure 3
250
300
350
400
450
−40 0 25 85 125
T
J
− Junction Temperature − °C
f − Internally Set Oscillator Frequency − kHz
INTERNALLY SET OSCILLATOR
FREQUENCY
vs
JUNCTION TEMPERATURE
Figure 4
200
300
400
500
600
700
800
−40 0 25 85 125
T
J
− Junction Temperature − °C
f − Externally Set Oscillator Frequency − kHz
EXTERNALLY SET OSCILLATOR
FREQUENCY
vs
JUNCTION TEMPERATURE
Figure 5
1.240
1.245
1.250
1.255
1.260
0123456
T
A
= 85°C
REFIN = 1.25 V
I
O
− Output Current − A
− Output Voltage Regulation − V
OUTPUT VOLTAGE REGULATION
vs
OUTPUT CURRENT
V
O
Figure 6
1.247
1.248
1.249
1.251
1.252
1.253
3 3.5 4 4.5 5 5.5 6
T
A
= 85°C
REFIN = 1.25 V,
I
O
= 3 A
I
O
− Input Voltage − V
OUTPUT VOLTAGE REGULATION
vs
INPUT VOLTAGE
1.250
− Output Voltage Regulation − V
V
O
Figure 7
−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
ERROR AMPLIFIER OPEN LOOP RESPONSE
Phase − Degrees
Phase
Gain
R
L
= 10 kΩ,
C
L
= 160 pF,
T
A
= 25°C
Figure 8
5
6
7
8
9
−40 0 25 85 125
T
J
− Junction Temperature − °C
Slow-Start Time − ms
SLOW-START TIME
vs
JUNCTION TEMPERATURE
10