LP2985 Datasheet, PDF (13/24 Pages) National Semiconductor (TI) – Micropower 150 mA Low-Noise Ultra Low-Dropout Regulator Designed for Use with Very Low ESR Output Capacitors

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LP2985
150-mA LOW-NOISE LOW-DROPOUT REGULATOR
WITH SHUTDOWN
SLVS522F – JULY 2004 – REVISED AUGUST 2005
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)
TURN-ON TIME
TURN-ON TIME
4
10
4
V_O
3
3
8
2
2
10
V_O
8
1
6
0
V_O = 3.3 V
−1 _{Cbyp = 100 pF}
I_LOAD = 150 mA
−2
−3
4
V_ON/OFF
2
−4
0
200 µs/div"
Figure 25.
1
0
−1
V_O = 3.3 V
C_byp = 1 nF
I_LOAD = 150 mA
−2
−3
−4
2 ms/div"
Figure 26.
6
4
V_ON/OFF
2
0
TURN-ON TIME
4
Input
10
3
8
2
1
0
−1
V_O = 3.3 V
C_byp = 10 nF
I_LOAD = 150 mA
−2
−3
−4
20 ms/div"
Figure 27.
6
4
Output
2
0
13