Datasheet

LM2937-2.5, LM2937-3.3
www.ti.com 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
) 2.5V 3.3V
Units
Parameter Conditions Typ Limit Typ Limit
Output Voltage 5 mA ≤ I
OUT
≤ I
OUTmax
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
(2)
4.75V ≤ V
IN
≤ 26V,
7.5 25 9.9 33 mV(Max)
I
OUT
= 5 mA
Load Regulation 5 mA ≤ I
OUT
≤ I
OUTmax
2.5 25 3.3 33 mV(Max)
Quiescent Current 7V ≤ V
IN
≤ 26V, 2 10 2 10 mA(Max)
I
OUT
= 5 mA
V
IN
= (V
OUT
+ 5V), 10 20 10 20 mA(Max)
I
OUT
= I
OUTmax
V
IN
= 5V, I
OUT
= I
OUTmax
66 100125 66 100125 mA(Max)
Output Noise Voltage 10 Hz–100 kHz,
75 99 μVrms
I
OUT
= 5 mA
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 Voltage t
f
< 100 ms, R
L
= 100Ω 75 60 75 60 V(Min)
Maximum Operational Input
26 26 V(Min)
Voltage
Reverse DC Input Voltage V
OUT
≥ −0.6V, R
L
= 100Ω −30 −15 −30 −15 V(Min)
Reverse Transient Input t
r
< 1 ms, R
L
= 100Ω
−75 −50 −75 −50 V(Min)
Voltage
(1) Typicals are at T
J
= 25°C and represent the most likely parametric norm.
(2) 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.
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Product Folder Links: LM2937-2.5 LM2937-3.3