LM2990T-15/NOPB National Semiconductor, LM2990T-15/NOPB Datasheet - Page 4
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LM2990T-15/NOPB
Manufacturer Part Number
LM2990T-15/NOPB
Description
IC REGULATOR NEG LDO TO220-3
Manufacturer
National Semiconductor
Type
Regulatorr
Specifications of LM2990T-15/NOPB
Regulator Topology
Negative Fixed
Voltage - Output
-15V
Voltage - Input
Down to -26V
Voltage - Dropout (typical)
0.6V @ 1A
Number Of Regulators
1
Current - Output
1.8A
Operating Temperature
-40°C ~ 125°C
Mounting Type
Through Hole
Package / Case
TO-220-3 (Straight Leads)
Current, Output
1 A
Current, Supply
9 mA
Package Type
TO-220
Regulation, Line
6 V
Regulation, Load
3 V
Regulator Type
Low Dropout, Negative Voltage Out
Resistance, Thermal, Junction To Case
3 °C/W
Temperature, Operating, Range
-40 to +125 °C
Voltage, Dropout
0.6 V
Voltage, Input
-26 V
Voltage, Noise
600 μV
Voltage, Output
15 V
Voltage Regulator Type
Linear
Topology
LDO
Regulator Output Type
Fixed
Polarity Type
Negative
Number Of Outputs
Single
Input Voltage (min)
-26V
Input Voltage (max)
0.3V
Output Voltage
-15V
Output Current
1.8(Typ)A
Load Regulation
50mV
Line Regulation
60mV
Output Voltage Accuracy
±5%
Operating Temp Range
-40C to 125C
Operating Temperature Classification
Automotive
Dropout Voltage@current (max)
0.3@100mA/1@1A
Dropout Voltage@current (typ)
0.1@100mA/0.6@1A
Pin Count
3 +Tab
Mounting
Through Hole
Quiescent Current (max)
5mA
Polarity
Negative
Input Voltage Max
0.3 V
Output Type
Fixed
Dropout Voltage (max)
0.3 V at 100 mA
Voltage Regulation Accuracy
+/- 5 %
Maximum Operating Temperature
+ 125 C
Mounting Style
Through Hole
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Limit (min)
-
Lead Free Status / Rohs Status
RoHS Compliant part
Electrostatic Device
Other names
*LM2990T-15
*LM2990T-15/NOPB
LM2990T-15
*LM2990T-15/NOPB
LM2990T-15
www.national.com
Quiescent Current (I
Short Circuit Current
Maximum Output Current
Ripple Rejection
Output Noise Voltage
Long Term Stability
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 power dissipation is a function of T
(T
approximately 160°C. For the LM2990, the junction-to-ambient thermal resistance, is 53°C/W, 73°C/W for the TO-263, and the junction-to-case thermal resistance
is 3°C. If the TO-263 package is used, the thermal resistance can be reduced by increasing the P.C. board copper area thermally connected to the package.
Using 0.5 square inches of copper area, θ
θ
Note 4: Typicals are at T
Note 5: Limits are guaranteed and 100% production tested.
Note 6: V
Note 7: The short circuit current is less than the maximum output current with the −12V and −15V versions due to internal foldback current limiting. The −5V and
−5.2V versions, tested with a lower input voltage, does not reach the foldback current limit and therefore conducts a higher short circuit current level. If the LM2990
output is pulled above ground, the maximum allowed current sunk back into the LM2990 is 1.5A.
Definition of Terms
Dropout Voltage: The input-output voltage differential at
which the circuit ceases to regulate against further reduction
in input voltage. Measured when the output voltage has
dropped 100 mV from the nominal value obtained at (V
input, dropout voltage is dependent upon load current and
junction temperature.
Input Voltage: The DC voltage applied to the input terminals
with respect to ground.
Input-Output Differential: The voltage difference between
the unregulated input voltage and the regulated output volt-
age for which the regulator will operate.
Line Regulation: The change in output voltage for a change
in the input voltage. The measurement is made under condi-
tions of low dissipation or by using pulse techniques such that
the average chip temperature is not significantly affected.
JA
Jmax
is 32°C/W.
− T
Parameter
O(NOM)
A
)/θ
JA
. If this dissipation is exceeded, the die temperature will rise above 125°C, and the LM2990 will eventually go into thermal shutdown at a T
is the nominal (typical) regulator output voltage, −5V, −5.2V, −12V or −15V.
q
)
J
= 25°C and represent the most likely parametric norm.
I
I
R
(Note
V
ƒ
10 Hz–100 kHz, I
1000 Hours
O
O
ripple
ripple
L
≤
= 1A, V
= 1Ω
1A
= 1 kHz, I
JA
7)
= 1 V
is 50°C/W; with 1 square inch of copper area, θ
(Note
IN
Conditions
rms
= V
,
7)
O
O(NOM)
= 5 mA
O
Jmax
= 5 mA
, θ
JA
O
, and T
+ 5V)
A
. The maximum allowable power dissipation at any ambient temperature is P
4
(Note
2000
Typ
500
1.2
1.8
52
Load Regulation: The change in output voltage for a change
in load current at constant chip temperature.
Long Term Stability: Output voltage stability under acceller-
ated life-test conditions after 1000 hours with maximum rated
voltage and junction temperature.
Output Noise Voltage: The rms AC voltage at the output,
with constant load and no input ripple, measured over a spec-
ified frequency range.
Quiescent Current: That part of the positive input current
that does not contribute to the positive load current. The reg-
ulator ground lead current.
Ripple Rejection: The ratio of the peak-to-peak input ripple
voltage to the peak-to-peak output ripple voltage.
Temperature Stability of V
output voltage for a thermal variation from room temperature
to either temperature extreme.
1
9
LM2990-12
4)
JA
is 37°C/W; and with 1.6 or more square inches of copper area,
(Note
Limit
1500
0.9
1.4
50
42
5
5)
(Note
2000
Typ
600
1.0
1.8
52
1
9
O
LM2990-15
: The percentage change in
4)
(Note
Limit
1800
0.75
1.4
50
42
5
5)
mA (max)
mA (max)
μV (max)
dB (min)
A (min)
A (min)
(Limit)
Units
D
ppm
=
J
of