LP2985_10 Datasheet, PDF (10/27 Pages) Texas Instruments – 150-mA LOW-NOISE LOW-DROPOUT REGULATOR WITH SHUTDOWN

LP2985
SLVS522M – JULY 2004 – REVISED MARCH 2009 .......................................................................................................................................................... www.ti.com
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
C_IN = 1 µF, C_OUT = 4.7 µF, V_IN = V_OUT(NOM) + 1 V, T_A = 25°C, ON/OFF pin tied to V_IN (unless otherwise specified)
OUTPUT IMPEDANCE
vs
FREQUENCY
10
C_i = 1 µF
C_o = 4.7 µF
V_O = 3.3 V
1
1 mA
10 mA
100 mA
0.1
OUTPUT NOISE DENSITY
vs
FREQUENCY
10
I_LOAD = 150 mA
1
C_byp = 100 pF
C_byp = 1 nF
0.01
0.1
C_byp = 10 nF
0.001
10
100
1k
10k
Frequency − Hz
Figure 13.
100k
1M
OUTPUT NOISE DENSITY
vs
FREQUENCY
10
I_LOAD = 1 mA
1
C_byp = 100 pF
C_byp = 1 nF
0.1
C_byp = 10 nF
0.01
100
1k
10k
Frequency − Hz
Figure 15.
100k
0.01
100
1k
10k
Frequency − Hz
Figure 14.
INPUT CURRENT
vs
INPUT VOLTAGE
1.8
V_O = 3.3 V
1.6 ^Cbyp ^{= 10 nF}
R_L = 3.3 kΩ
1.4
1.2
1
0.8
0.6
R_L = Open
0.4
0.2
0
0
1
2
3
4
5
Input Voltage − V
Figure 16.
100k
6
10
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