Datasheet

TPS77001, TPS77012, TPS77015, TPS77018, TPS77025
TPS77027, TPS77028, TPS77030, TPS77033, TPS77050
ULTRALOW-POWER 50-mA LOW-DROPOUT LINEAR REGULATORS
SLVS210D – JUNE 1999 – REVISED MAY 2001
8
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
Figure 9
100 1M10 1k
f – Frequency – Hz
10k
– Output Impedance –Z
o
Ω
OUTPUT IMPEDANCE
vs
FREQUENCY
0
1.6
1
2
0.2
1.4
0.4
1.8
0.6
1.2
0.8
100k
V
I
= 4.3 V
C
O
= 4.7 µF
I
O
= 50 mA
I
O
= 1 mA
Figure 10
T
A
– Free-Air Temperature – °C
1
10
100
– Dropout Voltage – mV
V
DO
TPS77033
DROPOUT VOLTAGE
vs
FREE-AIR TEMPERATURE
–40 0–20 20 140–60 40 80 100 12060
V
I
= 3.2 V
C
O
= 4.7 µF
I
O
= 10 mA
I
O
= 50 mA
Figure 11
10 M1 M100 k10 k1 k100
Ripple Rejection – dB
f – Frequency – Hz
RIPPLE REJECTION
vs
FREQUENCY
100
60
50
40
30
20
10
0
–10
10
TPS77033
V
I
= 4.3 V
C
O
= 4.7 µF
ESR = 0.3 Ω
70
80
90
I
O
= 50 mA
I
O
= 1 mA
Figure 12
LDO STARTUP TIME
t – Time – µs
0604020 80 100 140120 160 180 200
V
O
EN