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LM2991QML Datasheet(PDF) 4 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
Part # LM2991QML
Description  Negative Low Dropout Adjustable Regulator
PDF  13 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2991QML Datasheet(HTML) 4 Page - National Semiconductor (TI)

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LM2991 Electrical Characteristics
DC Parameters
The following conditions apply, unless otherwise specified.
DC:
V
I = −10V, VO = −3V, IO = 1A, CO = 47µF, RL = 2.7K
Ω
Symbol
Parameter
Conditions
Notes
Min
Max
Units
Sub-
groups
V
Ref
Reference Voltage
5mA
≤ I
O
≤ 1A
-1.234 -1.186
V
1
5mA
≤ I
O
≤ 1A,
V
O -1V
≥ V
I
≥ -26V
-1.27
-1.15
V
2, 3
V
O
Output Voltage Range
-3.0
V
1
V
I = -26V
-24
V
1
-25
V
2, 3
V
RLine
Line Regulation
I
O = 5mA, VO -1V
≥ V
I
≥ -26V
-26
+26
mV
1, 2, 3
V
RLoad
Load Regulation
50mA
≤ I
O
≤ 1A
-12
+12
mV
1
-15
+15
mV
2, 3
V
DO
Dropout Voltage
I
O = 0.1A,
∆V
O
≤ 100mV
0.2
V
1
0.3
V
2, 3
I
O = 1A,
∆V
O
≤ 100mV
0.8
V
1
1.0
V
2, 3
I
Q
Quiescent Current
I
O
≤ 1A
5.0
mA
1, 2, 3
Dropout Quiescent Current
V
I =VO,IO
≤ 1A
50
mA
1, 2, 3
V
ON
Output Noise
10Hz - 100KHz, I
O = 5mA
450
µV
1
500
µV
2, 3
ON/OFF Input Voltage
V
O :ON
0.8
V
1,2,3
V
O : OFF
2.4
V
1, 2, 3
ON/OFF Input Current
VON/OFF = 0.8V (V
O : ON)
10
µA
1
25
µA
2, 3
VON/OFF = 2.4V (V
O : OFF)
100
µA
1
150
µA
2, 3
I
L
Output Leakage Current
V
I = -26V, VON/OFF = 2.4V,
V
O =0V
250
µA
1
300
µA
2, 3
I
Limit
Current Limit
V
O = 0V
1.5
2.5
A
1
1.0
4.0
A
2, 3
AC Parameters
The following conditions apply, unless otherwise specified.
AC:
V
I = −10V, VO = −3V, IO = 1A, CO = 47µF, RL = 2.7K
Ω
Symbol
Parameter
Conditions
Notes
Min
Max
Units
Sub-
groups
RR
Ripple Rejection
V
Ripple =1VRMS,FRipple = 1KHz,
I
O = 5mA
50
dB
1
www.national.com
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