SNVS015E – FEBRUARY 1998 – REVISED APRIL 2013
Electrical Characteristics
(1)
V
IN
= V
NOM
+ 5V, I
OUTmax
= 500 mA for the TO-220 and DDPAK/TO-263 packages, I
OUTmax
=400mA for the SOT-223 package,
C
OUT
= 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
= T
J
= 25°C.
Output Voltage (V
OUT
)
Parameter
Output Voltage
Conditions
5 mA
≤
I
OUT
≤
I
OUTmax
2.5
Typ
2.5V
Limit
2.42
2.38
2.56
2.62
Line Regulation
(2)
3.3V
Typ
3.3
Limit
3.20
3.14
3.40
3.46
9.9
3.3
2
10
66
99
13.2
0.6
60
26
1.0
75
0.6
60
26
−30
−75
−15
−50
33
33
10
20
100125
Units
V (Min)
V(Min)
V(Max)
V(Max)
mV(Max)
mV(Max)
mA(Max)
mA(Max)
mA(Max)
μVrms
mV
A(Min)
V(Min)
V(Min)
V(Min)
V(Min)
4.75V
≤
V
IN
≤
26V,
I
OUT
= 5 mA
5 mA
≤
I
OUT
≤
I
OUTmax
7V
≤
V
IN
≤
26V,
I
OUT
= 5 mA
V
IN
= (V
OUT
+ 5V),
I
OUT
= I
OUTmax
V
IN
= 5V, I
OUT
= I
OUTmax
7.5
2.5
2
10
66
75
10
1.0
75
25
25
10
20
100125
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
(1)
(2)
10 Hz–100 kHz,
I
OUT
= 5 mA
1000 Hrs.
t
f
< 100 ms, R
L
= 100Ω
V
OUT
≥ −0.6V,
R
L
= 100Ω
t
r
< 1 ms, R
L
= 100Ω
−30
−75
−15
−50
Typicals are at T
J
= 25°C and represent the most likely parametric norm.
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.
Copyright © 1998–2013, Texas Instruments Incorporated
3
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