Datasheet

LP2985LV-N
SNOS510P –NOVEMBER 1999–REVISED APRIL 2013 www.ti.com
ELECTRICAL CHARACTERISTICS
(1)
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.
LP2985AI-X.X
(2)
LP2985I-X.X
(2)
Symbol Parameter Conditions Typ Units
Min Max Min Max
I
L
= 1 mA −1.0 1.0 −1.5 1.5
1 mA ≤ I
L
≤ 50 mA −1.5 1.5 −2.5 2.5
Output Voltage
ΔV
O
−2.5 2.5 −3.5 3.5 %V
NOM
Tolerance
1 mA ≤ I
L
≤ 150 mA −2.5 2.5 −3.0 3.0
−3.5 3.5 −4.0 4.0
0.007 0.014 0.014
Output Voltage
V
O
(NOM)+1V ≤ V
IN
≤ 16V %/V
0.032 0.032
Line Regulation
95 95
I
L
= 0 65
125 125
110 110
I
L
= 1 mA 75
170 170
220 220
I
L
= 10 mA 120
400 400
I
GND
Ground Pin Current µA
500 500
I
L
= 50 mA 300
900 900
1200 1200
I
L
= 150 mA 825
2000 2000
V
ON/OFF
< 0.3V 0.01 0.8 0.8
V
ON/OFF
< 0.15V 0.05 2 2
Minimum Input Voltage
V
IN
(min) Required To maintain Output 2.05 2.20 2.20 V
Regulation
(3)
150 150
IL = 50mA 120
250 250
V
IN
- V
OUT
Dropout Voltage
(3)
mV
350 350
IL = 150mA 280
600 600
High = O/P ON 1.4 1.6 1.6
V
ON/OFF
ON/OFF Input Voltage
(4)
V
Low = O/P OFF 0.55 0.15 0.15
V
ON/OFF
= 0 0.01 −2 −2
I
ON/OFF
ON/OFF Input Current µA
V
ON/OFF
= 5V 5 15 15
BW = 300 Hz to 50 kHz,
C
OUT
= 10 µF
e
n
Output Noise Voltage (RMS) 30 µV
C
BYPASS
= 10 nF
V
OUT
= 1.8V
f = 1 kHz, C
BYPASS
= 10 nF
Ripple Rejection 45 dB
C
OUT
= 10 µF
I
O
(SC) Short Circuit Current R
L
= 0 (Steady State)
(5)
400 mA
I
O
(PK) Peak Output Current V
OUT
≥ V
o
(NOM) −5% 350 mA
(1) Exposing the DSBGA device to direct sunlight will cause misoperation. See APPLICATION HINTS for additional information.
(2) Limits are 100% production tested at 25°C. Limits over the operating temperature range are ensured through correlation using Statistical
Quality Control (SQC) methods. The limits are used to calculate Average Outgoing Quality Level (AOQL).
(3) V
IN
must be the greater of 2.2V or V
OUT(NOM)
+ Dropout Voltage to maintain output regulation. Dropout Voltage is defined as the input to
output differential at which the output voltage drops 2% below ther value measured with a 1V differential.
(4) The ON/OFF input must be properly driven to prevent possible misoperation. For details, refer to APPLICATION HINTS.
(5) The LP2985LV-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 TYPICAL PERFORMANCE CHARACTERISTICS curves).
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