LM2991T National Semiconductor, LM2991T Datasheet - Page 3

• Manufacturer Part Number: LM2991T
• Description: IC LINEAR VOLT REG, -2V TO -25V, TO220-5
• Manufacturer: National Semiconductor

Specifications of LM2991T

• Primary Input Voltage: -26V
• Dropout Voltage Vdo: 600mV
• No. Of Outputs: 1
• No. Of Pins: 5
• Output Current: 1A
• Operating Temperature Range: -40°C To +125°C
• Voltage Regulator Type: Linear
• Topology: LDO
• Regulator Output Type: Adjustable
• Polarity Type: Negative
• Number Of Outputs: Single
• Input Voltage (min): -26V
• Input Voltage (max): 0.3V
• Output Voltage: -3 to -24V
• Package Type: TO-220
• Load Regulation: 0.4%
• Line Regulation: 0.04%/V
• Operating Temp Range: -40C to 125C
• Operating Temperature Classification: Automotive
• Dropout Voltage@current (max): 0.2@100mA/0.8@1A
• Dropout Voltage@current (typ): 0.1@100mA/0.6@1A
• Pin Count: 5 +Tab
• Mounting: Through Hole
• Quiescent Current (max): 5mA
• Rohs Compliant: Yes
• Output Voltage Adjustable Range: -2V To -25V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Reference Voltage
Output Voltage Range
Line Regulation
Load Regulation
Dropout Voltage
Quiescent Current
Dropout Quiescent Current V
Ripple Rejection
Output Noise
ON /OFF Input Voltage
ON /OFF Input Current
Output Leakage Current
Current Limit
Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Electrical Characteristics
V
entire operating junction temperature range.
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics.
Note 2: Human body model, 100 pF discharged through a 1.5 kΩ resistor.
Note 3: The maximum allowable power dissipation is a function of the maximum operating junction temperature (T
(θ
expected ambient temperature. If this dissipation is exceeded, the die temperature will rise above 125°C. Excessive power dissipation will cause the LM2991 to
go into thermal shutdown (See
TO-263, and junction-to-case thermal resistance is 3°C/W. If the TO-263 package is used, the thermal resistance can be reduced by increasing the PC board
copper area thermally connected to the package. Using 0.5 square inches of copper area, θ
with 1.6 or more square inches of copper area, θ
Note 4: Typicals are at T
Input Voltage
ESD Susceptibility
Power Dissipation
Storage Temperature Range
Lead Temperature (Soldering, 10 sec.)
IN
JA
), and the ambient temperature (T
= −10V, V
Parameter
O
= −3V, I
(Note
(Note
J
= 25°C and represent the most likely parametric norm.
O
THERMAL
= 1A, C
3)
5 mA
5 mA
V
V
I
50 mA
I
I
I
V
10 Hz − 100 kHz, I
(V
(V
V
V
V
V
2)
O
O
O
O
O
IN
IN
ripple
ON/OFF
ON/OFF
IN
OUT
OUT
OUT
= 5 mA, V
= 0.1A, ΔV
= 1A, ΔV
≤
− 1V
= −26V
= V
= −26V, V
1A
A
). The maximum allowable power dissipation is: P
= 0V
: ON)
: OFF)
≤
≤
= 1 Vrms, f
≤
O
O
I
I
= 0.8V (V
= 2.4V (V
, I
SHUTDOWN). For the LM2991, the junction-to-ambient thermal resistance is 53°C/W for the TO-220, 73°C/W for the
O
O
≥
= 47 μF, R1 = 2.7 kΩ, T
I
O
O
≤
≤
V
O
≤
≤
IN
O
1A
1A,
O
≤
JA
ON/OFF
1A
− 1V
1A
≥
≤
is 32°C/W.
100 mV
−65°C to +150°C
−26V
Internally limited
Conditions
100 mV
ripple
OUT
OUT
O
−26V to +0.3V
≥
= 5 mA
= 2.4V, V
: ON)
: OFF)
(Note
V
= 1 kHz, I
IN
≥
230°C
1)
−26V
2 kV
OUT
O
J
= 5 mA
= 0V
= 25°C, unless otherwise specified. Boldface limits apply over the
3
Operating Ratings
Junction Temperature Range (T
ON/OFF Pin
Maximum Input Voltage (Operational)
D
= (T
JA
is 50°C/W; with 1 square inch of copper area, θ
J(MAX)
(Note
Typical
−1.210
0.004
0.04
−25
200
0.1
0.6
0.7
1.2
1.3
0.1
−2
16
60
40
60
− T
2
A
4)
)/θ
JA
, where T
J(MAX))
−1.234
−1.27
Min
−24
J(MAX)
2.4
1.5
50
, the thermal resistance of the package
is 125°C, and T
(Note
J
)
1)
−1.186
−1.15
−40°C to +125°C
Max
0.04
450
100
250
0.4
0.2
0.3
0.8
0.8
−3
50
10
1
5
A
JA
is the maximum
is 37°C/W; and
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0V to +5V
−26V
Units
%/V
mA
mA
dB
μV
μA
μA
%
V
V
V
V
V
A