Datasheet

TPS77301/315/316/318/327/328/333/350 WITH RESET OUTPUT
TPS77401/415/418/427/428/433/450 WITH POWER GOOD OUTPUT
250-mA LDO REGULATORS WITH 8-PIN MSOP PACKAGING
SLVS281E – FEBRUARY 2000 – REVISED JULY 2001
10
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
TPS77xxx
GROUND CURRENT
vs
JUNCTION TEMPERATURE
T
J
– Junction Temperature – °C
Ground Current – Aµ
95
90
85
80
–40 10 60
100
105
115
110 160
110
I
O
= 1 mA
I
O
= 250 mA
Figure 6
Figure 7
50
10
20
0
10 100 1k 10k
PSRR – Power Supply Rejection Ratio – dB
70
90
f – Frequency – Hz
TPS77x33
POWER SUPPLY REJECTION RATIO
vs
FREQUENCY
100
100k 10M
80
30
40
60
1M
I
O
= 1 mA
I
O
= 250 mA
C
O
= 10 µF
T
J
= 25 °C
Figure 8
TPS77x33
OUTPUT SPECTRAL NOISE DENSITY
vs
FREQUENCY
f – Frequency – Hz
100 1k 10k 100k
10
1
I
O
= 1 mA
I
O
= 250 mA
V HzOutput Spectral Noise Density – µ
0.1
0.01
C
O
= 10 µF
T
J
= 25 °C