Datasheet

LP2981-N
www.ti.com SNOS773K –MARCH 2000–REVISED APRIL 2013
ELECTRICAL CHARACTERISTICS
Limits in standard typeface are for T
J
= 25°C, and limits in boldface type applyover the full operating temperature range.
Unless otherwise specified: V
IN
= V
O(NOM)
+ 1V, C
IN
= 1 μF, I
L
= 1 mA, C
OUT
= 4.7 μF,V
ON/OFF
= 2V.
Symbol Parameter Conditions Typ LP2981AI-XX
(1)
LP2981I-XX
(1)
Units
Min Max Min Max
ΔV
O
Output Voltage Tolerance I
L
= 1mA −0.75 0.75 −1.25 1.25
1 mA < I
L
< 100 mA −1.0 1.0 −2.0 2.0 %V
NOM
−2.5 2.5 −3.5 3.5
Output Voltage V
O(NOM)
+ 1V 0.007 0.014 0.014 %/V
Line Regulation ≤ V
IN
≤ 16V 0.032 0.032
V
IN
–V
O
Dropout Voltage
(2)
I
L
= 0 1 3 3 mV
5 5
I
L
= 1 mA 7 10 10
15 15
I
L
= 25 mA 70 100 100
150 150
I
L
= 100 mA 200 250 250
375 375
I
GND
Ground Pin Current I
L
= 0 65 95 95 μA
125 125
I
L
= 1 mA 80 110 110
170 170
I
L
= 25 mA 200 300 300
550 550
I
L
= 100 mA 600 800 800
1500 1500
V
ON/OFF
< 0.3V 0.01 0.8 0.8
V
ON/OFF
< 0.15V 0.05 2 2
V
ON/OFF
ON/OFF Input Voltage
(3)
High = O/P ON 1.4 1.6 1.6 V
Low = O/P OFF 0.50 0.15 0.15
I
ON/OFF
ON/OFF Input Current V
ON/OFF
= 0 0.01 −1 −1 μA
V
ON/OFF
= 5V 5 15 15
I
O(PK)
Peak Output Current V
OUT
≥ V
O(NOM)
− 5% 400 150 150 mA
e
n
Output Noise BW = 300 Hz–50 kHz, 160 μV
Voltage (RMS) C
OUT
= 10 μF
Ripple Rejection f = 1 kHz 63 dB
C
OUT
= 10 μF
I
O(MAX)
Short Circuit Current R
L
= 0 (Steady State)
(4)
150 mA
(1) Limits are 100% production tested at 25°C. Limits over the operating temperature range are specified through correlation using
Statistical Quality Control (SQC) methods. The limits are used to calculate TI's Average Outgoing Quality Level (AOQL).
(2) 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.
(3) The ON/OFF inputs must be properly driven to prevent misoperation. For details, refer to APPLICATION HINTS.
(4) See TYPICAL PERFORMANCE CHARACTERISTICS curve(s).
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