Datasheet

TPS76425, TPS76427, TPS76428, TPS76430, TPS76433
LOW-POWER LOW-NOISE 150-mA LOW-DROPOUT LINEAR REGULATORS
SLVS180B – MARCH 1999 – REVISED MAY 2001
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TYPICAL CHARACTERISTICS
Figure 7
Load Current – mA
010
1
10
2
OUTPUT NOISE VOLTAGE
vs
LOAD CURRENT
V
O
= 2.5 V
C
O
= 10 µF
f = 10 Hz to 100 kHz
T
A
= 25°C
10
20
30
40
50
60
70
Vµ– Output Noise Voltage –
V
n
Figure 8
0.1
0.1 1 1000
10
0.01 10
1
f – Frequency – kHz
100
– Output Impedance –Z
o
Ω
OUTPUT IMPEDANCE
vs
FREQUENCY
C
I
= C
O
= 4.7 µF
ESR = 1 Ω
T
A
= 25°C
I
O
= 150 mA
I
O
= 1 mA
Figure 9
T
A
– Free-Air Temperature – °C
200
0
–35 5
300
100
–15 25 125
600
–55
45 65
400
500
V
I
= EN = 2.7 V
C
I
= C
O
= 4.7 µF
85 105
1 mA
– Dropout Voltage – mV
V
DO
150 mA
0 mA
TPS76425
DROPOUT VOLTAGE
vs
FREE-AIR TEMPERATURE
Figure 10
10 M1 M100 k10 k1 k100
Ripple Rejection – dB
f – Frequency – Hz
RIPPLE REJECTION
vs
FREQUENCY
100
90
80
70
60
40
30
10
0
10
TPS76425
V
O
= 2.5 V
C
(BYPASS)
= 0.01 µF
C
L
= 10 µF
I
O
= 150 mA
I
O
= 1 mA
50
20