LM2937-25 National Semiconductor, LM2937-25 Datasheet - Page 3

• Manufacturer Part Number: LM2937-25
• Description: 400mA and 500mA Voltage Regulators
• Manufacturer: National Semiconductor

Output Voltage
Line Regulation(Note 5)
Load Regulation
Quiescent Current
Output Noise
Voltage
Long Term Stability
Short-Circuit Current
Peak Line Transient
Voltage
Maximum Operational
Input Voltage
Reverse DC
Input Voltage
Reverse Transient
Input Voltage
Electrical Characteristics
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Electrical specifications do not apply when operating the device
outside of its rated Operating Conditions.
Note 2: The maximum allowable power dissipation at any ambient temperature is P
eration, T
and the electrical specifications do not apply. If the die temperature rises above 150˚C, the regulator will go into thermal shutdown. The junction-to-ambient thermal
resistance
sum of the device junction-to-case thermal resistance
used, the thermal resistance can be reduced by increasing the P.C. board copper area thermally connected to the package (see Application Hints for more information
on heatsinking).
Note 3: ESD rating is based on the human body model, 100 pF discharged through 1.5 k .
Note 4: Typicals are at T
Note 5: The minimum input voltage required for proper biasing of these regulators is 4.75V. Below this level the outputs will fall out of regulation. This effect is not
the normal dropout characteristic where the output falls out of regulation due to the PNP pass transistor entering saturation. If a value for worst case effective input
to output dropout voltage is required in a specification, the values should be 2.37V maximum for the LM2937-2.5 and 1.6V maximum for the LM2937-3.3.
V
= 10 µF unless otherwise indicated. Boldface limits apply over the entire operating temperature range, of the indicated
device, all other specifications are for T
Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Input Voltage
Internal Power Dissipation (Note 2)
Maximum Junction Temperature
Storage Temperature Range
Lead Temperature Soldering
IN
Continuous
Transient (t
= V
Parameter
A
NOM
TO-220 (10 seconds)
is the ambient temperature, and
JA
is 65˚C/W, for the TO-220 package, 73˚C/W for the TO-263 package, and 174˚C/W for the SOT-223 package. When used with a heatsink,
+ 5V, I
100 ms)
Output Voltage (V
OUTmax
J
= 25˚C and represent the most likely parametric norm.
= 500 mA for the TO-220 and TO-263 packages, I
5 mA
4.75V
I
5 mA
7V
I
V
I
10 Hz–100 kHz,
I
1000 Hrs.
t
V
t
OUT
OUT
OUT
OUT
f
r
IN
OUT
<
<
V
= (V
IN
100 ms, R
1 ms, R
JA
= 5 mA
= 5 mA
= I
= 5 mA
V
= 5V, I
OUT
IN
is the junction-to-ambient thermal resistance. If this dissipation is exceeded, the die temperature will rise above 125˚C
−0.6V, R
I
I
OUTmax
V
OUT
OUT
OUT
Conditions
IN
A
)
26V,
(Note 4)
= T
L
+ 5V),
OUT
JC
Internally Limited
−65˚C to +150˚C
= 100
26V,
L
I
I
OUTmax
OUTmax
J
of 3˚C/W and the heatsink case-to-ambient thermal resistance. If the TO-263 or SOT-223 packages are
= 100
L
260˚C
(Note 1)
= 25˚C.
= I
= 100
OUTmax
150˚C
26V
60V
3
MAX
Typ
−30
−75
2.5
7.5
2.5
1.0
ESD Susceptibility (Note 3)
Operating Conditions
Temperature Range (Note 2)
Input Voltage Range
10
66
75
10
75
SOT-223 (Vapor Phase, 60 seconds)
2
= (125 − T
SOT-223 (Infrared, 15 seconds)
2.5V
LM2937ES, LM2937ET
TO-263 (10 seconds)
OUTmax
A
100125
)/
Limit
2.42
2.38
2.56
2.62
−15
−50
0.6
LM2937IMP
25
25
10
20
60
26
JA
, where 125 is the maximum junction temperature for op-
= 400mA for the SOT-223 package, C
13.2
Typ
−30
−75
3.3
9.9
3.3
1.0
10
66
99
75
2
3.3V
(Note 1)
100125
Limit
3.20
3.14
3.40
3.46
−15
−50
0.6
33
33
10
20
60
26
−40˚C
−40˚C
230˚C
215˚C
220˚C
4.75V to 26V
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T
T
A
A
mV(Max)
mV(Max)
mA(Max)
mA(Max)
mA(Max)
V (Min)
V(Max)
V(Max)
V(Min)
A(Min)
V(Min)
V(Min)
V(Min)
V(Min)
µVrms
Units
JA
mV
125˚C
85˚C
OUT
is the
2 kV