SNVS018V – MARCH 2000 – REVISED JUNE 2013
ELECTRICAL CHARACTERISTICS
(continued)
Limits in standard typeface are for T
J
= 25°C. and limits in
boldface type
apply over the full operating temperature range.
Unless otherwise specified: V
IN
= V
O
(NOM) + 1V, I
L
= 1 mA, C
IN
= 1 µF, C
OUT
= 4.7 µF, V
ON/OFF
= 2V.
Symbol
V
IN
–V
O
Parameter
Dropout Voltage
(3)
I
L
= 0
I
L
= 1 mA
I
L
= 10 mA
I
L
= 50 mA
I
L
= 150 mA
I
GND
Ground Pin Current
I
L
= 0
I
L
= 1 mA
I
L
= 10 mA
I
L
= 50 mA
I
L
= 150 mA
V
ON/OFF
< 0.3V
V
ON/OFF
< 0.15V
V
ON/OFF
I
ON/OFF
e
n
ON/OFF Input
Voltage
(4)
ON/OFF Input Current
Output Noise
Voltage (RMS)
Ripple Rejection
High = O/P ON
Low = O/P OFF
V
ON/OFF
= 0
V
ON/OFF
= 5V
BW = 300 Hz to 50 kHz,
C
OUT
= 10 µF
C
BYPASS
= 10 nF
f = 1 kHz, C
BYPASS
= 10 nF
C
OUT
= 10 µF
I
O
(SC)
I
O
(PK)
(3)
(4)
(5)
Short Circuit Current
Peak Output Current
R
L
= 0 (Steady State)
(5)
V
OUT
≥
V
o
(NOM)
−5%
45
400
350
dB
mA
mA
30
µV
Conditions
Typ
1
7
40
120
280
65
75
120
350
850
0.01
0.05
1.4
0.55
0.01
5
1.6
0.15
−2
15
LP2985AI-X.X
(2)
Min
Max
3
5
10
15
60
90
150
225
350
575
95
125
110
170
220
400
600
1000
1500
2500
0.8
2
1.6
0.15
−2
15
LP2985I-X.X
(2)
Min
Max
3
5
10
15
60
90
150
225
350
575
95
125
110
170
220
400
600
1000
1500
2500
0.8
2
V
µA
µA
mV
Units
Dropout voltage is defined as the input to output differential at which the output voltage drops 100 mV below the value measured with a
1V differential.
The ON/OFF input must be properly driven to prevent possible misoperation. For details, refer to
The LP2985-N has foldback current limiting which allows a high peak current when V
OUT
> 0.5V, and then reduces the maximum output
current as V
OUT
is forced to ground (see
curves).
4
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