LP2985_15 Datasheet, PDF (9/29 Pages) Texas Instruments – 150-mA Low-noise Low-dropout Regulator With Shutdown

LP2985
www.ti.com
SLVS522O – JULY 2004 – REVISED JANUARY 2015
Typical 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)
10
C_i = 1 mF
C_o = 4.7 mF
V_O = 3.3 V
10
I_LOAD = 150 mA
1
1 mA
10 mA
1
C_byp = 100 pF
100 mA
0.1
C_byp = 1 nF
0.01
0.1
C_byp = 10 nF
0.001
10
100
1k
10k
100k
1M
Frequency − (Hz)
Figure 13. Output Impedance 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)
100k
Figure 15. Output Noise Density vs Frequency
1400
1200
V_O = 3.3 V
C_byp = 10 nF
150 mA
1000
800
600
1 mA
400
0 mA
200
50 mA
10 mA
0
−50 −25 0
25 50 75 100 125 150
Temperature − (°C)
Figure 17. Ground-pin Current vs Temperature
0.01
100
1k
10k
100k
Frequency − (Hz)
Figure 14. Output Noise Density vs Frequency
1.8
V_O = 3.3 V
1.6 ^Cbyp ^{= 10 nF}
1.4
R_L = 3.3 kW
1.2
1
0.8
0.6
R_L = Open
0.4
0.2
0
0
1
2
3
4
5
6
Input Voltage − (V)
Figure 16. Input Current vs Input Voltage
Figure 18. 2.2-μF Stable ESR Range
for Output Voltage ≤ 2.3 V
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