Datasheet

LP2983
www.ti.com SNVS170C –OCTOBER 2001–REVISED APRIL 2013
Electrical Characteristics
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
= 2.2 µF, V
ON/OFF
= 2V.
LP2983AI-X.X LP2983I-X.X
Symbol Parameter Conditions Typ
(1) (1)
Units
Min Max Min Max
ΔV
O
Output Voltage −1.0 1.0 −1.5 1.5
Tolerance
1 mA ≤ I
L
≤ 50 mA −2.0 2.0 −2.5 2.5
−2.5 2.5 −3.5 3.5 %
1 mA ≤ I
L
≤ 150 mA −2.5 2.5 −3.0 3.0
−3.5 3.5 −4.0 4.0
Output Voltage V
O
(NOM)+1V ≤ V
IN
≤ 16V 0.01 0.016 0.016
%/V
Line Regulation 0.032 0.032
I
GND
Ground Pin Current I
L
= 0 65 95 95
125 125
I
L
= 1 mA 75 110 110
170 170
I
L
= 10 mA 120 220 220
400 400
µA
I
L
= 50 mA 300 500 500
900 900
I
L
= 150 mA 825 1200 1500
2000 2000
V
ON/OFF
< 0.15V 6 12 12
V
ON/OFF
< 0.05V 0.2 2 2
V
IN
(min) Minimum V
IN
required to 2.05 2.20 2.20
maintain Output
Regulation
V
V
ON/OFF
ON/OFF Input Voltage High = O/P ON 1.4 1.6 1.6
(2)
Low = O/P OFF 0.1 0.05 0.05
I
ON/OFF
ON/OFF Input Current V
ON/OFF
= 0 0.01 −2 −2
µA
V
ON/OFF
= 5V 5 15 15
e
n
Output Noise BW = 10 Hz to 100 kHz,
Voltage (RMS) C
OUT
= 10 µF 60 µV
V
OUT
= 1.2V
Ripple Rejection f = 1 kHz
65 dB
C
OUT
= 2.2 µF
I
O
(SC) Short Circuit Current R
L
= 0 (Steady State)
400
(3)
mA
I
O
(PK) Peak Output Current V
OUT
≥ V
o
(NOM) −5% 250
(1) Limits are 100% production tested at 25°C. Limits over the operating temperature range are guaranteed through correlation using
Statistical Quality Control (SQC) methods. The limits are used to calculate National's Average Outgoing Quality Level (AOQL).
(2) The ON/OFF input must be properly driven to prevent possible misoperation. For details, refer to Application Hints.
(3) The LP2983 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 down to ground (see Typical Performance Characteristics curves).
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