lm2991qml National Semiconductor Corporation, lm2991qml Datasheet - Page 4

• Manufacturer Part Number: lm2991qml
• Description: Lm2991qml Negative Low Dropout Adjustable Regulator
• Manufacturer: National Semiconductor Corporation

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V
V
V
V
V
I
V
I
I
RR
Q
L
Limit
Ref
O
RLine
RLoad
DO
ON
Symbol
Symbol
LM2991 Electrical Characteristics
DC Parameters
The following conditions apply, unless otherwise specified.
DC:
AC Parameters
The following conditions apply, unless otherwise specified.
AC:
V
V
I
I
Reference Voltage
Output Voltage Range
Line Regulation
Load Regulation
Dropout Voltage
Quiescent Current
Dropout Quiescent Current
Output Noise
ON/OFF Input Voltage
ON/OFF Input Current
Output Leakage Current
Current Limit
= −10V, V
Ripple Rejection
= −10V, V
O
O
Parameter
Parameter
= −3V, I
= −3V, I
O
O
= 1A, C
= 1A, C
O
O
= 47µF, R
= 47µF, R
5mA ≤ I
5mA ≤ I
V
V
I
50mA ≤ I
I
I
I
V
10Hz - 100KHz, I
V
V
VON/OFF = 0.8V (V
VON/OFF = 2.4V (V
V
V
V
V
I
O
O
O
O
O
O
I
I
O
O
I
O
O
Ripple
= -26V
= 5mA, V
= 0.1A, ∆V
= 1A, ∆V
≤ 1A
= V
= -26V, VON/OFF = 2.4V,
= 5mA
- 1V ≥ V
: ON
: OFF
= 0V
= 0V
O
= 1V
, I
O
O
L
L
O
O
≤ 1A
≤ 1A,
Conditions
Conditions
= 2.7KΩ
= 2.7KΩ
≤ 1A
O
≤ 1A
I
RMS
O
≥ -26V
O
≤ 100mV
- 1V ≥ V
≤ 100mV
, F
O
4
Ripple
= 5mA
O
O
: ON)
: OFF)
I
≥ -26V
= 1KHz,
Notes
Notes
-1.234 -1.186
-1.27 -1.15
Min
Min
-24
-25
-26
-12
-15
2.4
1.5
1.0
50
Max
Max
-3.0
+26
+12
+15
450
500
100
150
250
300
0.2
0.3
0.8
1.0
5.0
0.8
2.5
4.0
50
10
25
Units
Units
mV
mV
mV
mA
mA
µV
µV
µA
µA
µA
µA
µA
µA
dB
V
V
V
V
V
V
V
V
V
V
V
A
A
groups
groups
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
Sub-
Sub-
2, 3
2, 3
2, 3
2, 3
2, 3
2, 3
2, 3
2, 3
2, 3
2, 3
1
1
1
1
1
1
1
1
1
1
1
1