TPS796_15 Datasheet, PDF (8/39 Pages) Texas Instruments – TPS796xx Ultralow-Noise, High PSRR, Fast, RF, 1-A Low-Dropout Linear Regulators

TPS79601, TPS79613, TPS79618, TPS79625
TPS79628, TPS79630, TPS79633, TPS79650
SLVS351P – SEPTEMBER 2002 – REVISED MARCH 2015
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Typical Characteristics (continued)
At V_EN = V_IN, V_IN = V_OUT(nom) + 1 V, I_OUT = 1 mA, C_OUT = 10 µF, C_NR = 0.01 µF, C_IN = 2.2 µF, and T_J = 25°C, unless otherwise
noted.
60
350
V = 2.7 V
IN
50
300
C
OUT
=
10
mF
I =1A
OUT
250
40
200
30
150
20
10
I_OUT = 250 mA
C_OUT = 10 mF
BW = 100 Hz to 100 kHz
0
0.001 mF
0.0047 mF
0.01 mF
C_NR (mF)
0.1 mF
100
50
I = 250 mA
OUT
0
-40-25-10 5 20 35 50 65 80 95 110 125
T_J (°C)
Figure 7. TPS79630 Root Mean Squared Output Noise vs
Bypass Capacitance
80
V_IN = 4 V
70
C_OUT = 10 mF
I_OUT = 1 mA
C_NR = 0.01 mF
60
50
I_OUT = 1 A
40
30
20
10
0
1 10 100 1k 10k 100k 1M 10M
Frequency (Hz)
Figure 8. TPS79628 Dropout Voltage vs
Junction Temperature
80
70
I_OUT = 1 mA
60
V_IN = 4 V
C_OUT = 10 mF
C_NR = 0.1 mF
50
I_OUT = 1 A
40
30
20
10
0
1 10 100 1k 10k 100k 1M 10M
Frequency (Hz)
Figure 9. TPS79630 Ripple Rejection vs Frequency
80
V_IN = 4 V
70
C_OUT = 2.2 mF
I_OUT = 1 mA
C_NR = 0.01 mF
60
50
I_OUT = 1 A
40
30
20
10
0
1 10 100 1k 10k 100k 1M 10M
Frequency (Hz)
Figure 10. TPS79630 Ripple Rejection vs Frequency
3
2.75
2.50
2.25
2
1.75
V_IN = 4 V,
C_OUT = 10 mF,
I_OUT = 1.0 A
C_NR =
0.001 mF
C_NR =
0.0047 mF
Enable
1.50
1.25
1
C_NR =
0.01 mF
0.75
0.50
0.25
0
0 100 200 300 400 500 600
t (µs)
Figure 11. TPS79630 Ripple Rejection vs Frequency
Figure 12. Start-Up Time
8
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