LP2985_06 Datasheet, PDF (12/25 Pages) Texas Instruments – 150-mA LOW-NOISE LOW-DROPOUT REGULATOR WITH SHUTDOWN

LP2985
150-mA LOW-NOISE LOW-DROPOUT REGULATOR
WITH SHUTDOWN
SLVS522J – JULY 2004 – REVISED AUGUST 2006
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)
LINE TRANSIENT RESPONSE
LINE TRANSIENT RESPONSE
3.41
5.5
3.41
5.5
3.39
3.37
3.35
3.33
V_O = 3.3 V
C_byp = 10 nF
I_O = 150 mA
5
V_I
4.5
4
3.5
3.39
3.37
3.35
3.33
V_O = 3.3 V
C_byp = 0 nF
I_O = 1 mA
5
V_I
4.5
4
3.5
3.31
3
3.29
V_O
2.5
3.27
2
20 µs/div"
Figure 21.
LINE TRANSIENT RESPONSE
3.41
5.5
3.39
5
3.37
V_IN
4.5
3.35
4
V_O = 3.3 V
C_byp = 10 nF
3.33 IO = 1 mA
3.5
3.31
V_O
3
3.29
2.5
3.27
2
100 µs/div"
Figure 23.
3.31
3.29
3.27
4
3
2
1
0
−1 ^{VO = 3.3 V}
C_byp = 0
I_O = 150 mA
−2
−3
−4
V_O
20 µs/div"
Figure 22.
TURN-ON TIME
V_O
V_ON/OFF
100 µs/div"
Figure 24.
3
2.5
2
10
8
6
4
2
0
12
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