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LM2937-3.3 数据表(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部件名 LM2937-3.3
功能描述  400mA and 500mA Voltage Regulators
Download  10 Pages
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制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
标志 NSC - National Semiconductor (TI)

LM2937-3.3 数据表(HTML) 3 Page - National Semiconductor (TI)

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Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Input Voltage
Continuous
26V
Transient (t
≤ 100 ms)
60V
Internal Power Dissipation (Note 2)
Internally Limited
Maximum Junction Temperature
150˚C
Storage Temperature Range
−65˚C to +150˚C
Lead Temperature Soldering
TO-220 (10 seconds)
260˚C
TO-263 (10 seconds)
230˚C
SOT-223 (Vapor Phase, 60 seconds)
215˚C
SOT-223 (Infrared, 15 seconds)
220˚C
ESD Susceptibility (Note 3)
2 kV
Operating Conditions(Note 1)
Temperature Range (Note 2)
LM2937ES, LM2937ET
−40˚C
≤ T
A ≤ 125˚C
LM2937IMP
−40˚C
≤ T
A ≤ 85˚C
Input Voltage Range
4.75V to 26V
Electrical Characteristics(Note 4)
V
IN = VNOM + 5V, IOUTmax = 500 mA for the TO-220 and TO-263 packages, IOUTmax=400mA for the SOT-223 package, COUT
= 10 µF unless otherwise indicated. Boldface limits apply over the entire operating temperature range, of the indicated
device, all other specifications are for T
A = TJ = 25˚C.
Output Voltage (V
OUT)
2.5V
3.3V
Units
Parameter
Conditions
Typ
Limit
Typ
Limit
Output Voltage
5 mA
≤ I
OUT ≤ IOUTmax
2.42
3.20
V (Min)
2.5
2.38
3.3
3.14
V(Min)
2.56
3.40
V(Max)
2.62
3.46
V(Max)
Line Regulation(Note 5)
4.75V
≤ V
IN ≤ 26V,
7.5
25
9.9
33
mV(Max)
I
OUT = 5mA
Load Regulation
5 mA
≤ I
OUT ≤ IOUTmax
2.5
25
3.3
33
mV(Max)
Quiescent Current
7V
≤ V
IN ≤ 26V,
2
10
2
10
mA(Max)
I
OUT = 5mA
V
IN = (VOUT + 5V),
10
20
10
20
mA(Max)
I
OUT = IOUTmax
V
IN = 5V, IOUT = IOUTmax
66
100125
66
100125
mA(Max)
Output Noise
10 Hz–100 kHz,
75
99
µVrms
Voltage
I
OUT = 5mA
Long Term Stability
1000 Hrs.
10
13.2
mV
Short-Circuit Current
1.0
0.6
1.0
0.6
A(Min)
Peak Line Transient
t
f < 100 ms, RL = 100Ω
75
60
75
60
V(Min)
Voltage
Maximum Operational
26
26
V(Min)
Input Voltage
Reverse DC
V
OUT ≥ −0.6V, RL = 100Ω
−30
−15
−30
−15
V(Min)
Input Voltage
Reverse Transient
t
r < 1 ms, RL = 100Ω
−75
−50
−75
−50
V(Min)
Input Voltage
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 PMAX = (125 − TA)/θJA, where 125 is the maximum junction temperature for op-
eration, TA is the ambient temperature, and θJA is the junction-to-ambient thermal resistance. If this dissipation is exceeded, the die temperature will rise above 125˚C
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
θJA 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, θJA is the
sum of the device junction-to-case thermal resistance
θJC of 3˚C/W and the heatsink case-to-ambient thermal resistance. If the TO-263 or SOT-223 packages are
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
Ω.
Note 4: Typicals are at TJ = 25˚C and represent the most likely parametric norm.
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.
3
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