TPS771_15 Datasheet, PDF (4/12 Pages) Texas Instruments – 150-mA LDO REGULATORS WITH 8-PIN MSOP PACKAGING

TPS78825, TPS78833
SLVS382A – JUNE 2001 – REVISED JULY 2001
TYPICAL CHARACTERISTICS
3.315
3.31
OUTPUT VOLTAGE
vs
LOAD CURRENT
VCC = 4.3 V
TJ = 25°C
3.305
3.3
3.295
3.29
3.285
0
15 30 45 60 75 90 105 120 135 150
IL – Load Current – mA
Figure 1
OUTPUT SPECTRAL NOISE DENSITY
vs
FREQUENCY
400
IO = 150 mA
300
IO = 1 mA
200
3.2
3.315
3.31
OUTPUT VOLTAGE
vs
FREE-AIR TEMPERATURE
VCC = 4.3 V
IO = 1 mA
3.305
3.3
3.295
3.29
IO = 150 mA
3.285
3.28
3.275
3.27
–40 –25 –10 5 20 35 50 65 80 95 110 125
TA – Free-Air Temperature – °C
Figure 2
ROOT MEAN SQUARED OUTPUT NOISE
vs
SLEW RATE CAPACITANCE
100
VI = 4.3 V
VO = 3.3 V
IO = 150 mA
80
Co = 10 µF
BW = 200Hz to 100 kHz
60
100 VI = 4.3 V
Co = 4.7 µF
C(SR) = 0.47 µF
0
100
1k
10 k
f – Frequency – Hz
100 k
Figure 4
DROPOUT VOLTAGE
vs
FREE-AIR TEMPERATURE
200
VCC = 3.2 V
150
IO = 150 mA
100
50
IO = 1 mA
0
–40 –25 –10 5 20 35 50 65 80 95 110 125
TA – Free-Air Temperature – °C
Figure 7
40
20
0.001
0.01
0.1
1
C(sr) – Slew Rate Capacitance – µF
Figure 5
RIPPLE REJECTION
vs
FREQUENCY
120
110
VI = 4.3 V
VO = 3.3 V
100 ^{Co = 10 µF}
C(SR) = 0.47 µF
90
80
IO = 1 mA
70
60
50
IO = 150 mA
40
30
20
10
100
1 k 10 k 100 k 1 M
f – Frequency – Hz
Figure 8
QUIESCENT CURRENT
vs
FREE-AIR TEMPERATURE
25
VCC = 4.3 V
IO = 150 mA
20
IO = 1 mA
15
10
5
0
–40 –25 –10 5 20 35 50 65 80 95 110 125
TA – Free-Air Temperature – °C
Figure 3
OUTPUT IMPEDANCE
vs
FREQUENCY
2
1.8
VI = 4.3 V
Co = 4.7 µF
1.6
1.4
1.2
1
0.8
0.6
IO = 1 mA
0.4
0.2
0
10
IO = 150 mA
100
1 k 10 k 100 k 1 M
f – Frequency – Hz
Figure 6
OUTPUT VOLTAGE, ENABLE VOLTAGE
vs
TIME (START-UP)
5
0
3
2
VI = 4.3 V
VO = 3.3 V
1
IO = 150 mA
C(SR) = 0.47 µF
0
Co = 10 µF
TJ = 25°C
0 100 200 300 400 500 600 700 800 900 1000
t – Time – ms
Figure 9
4
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