LM337
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2
MAXIMUM RATINGS (T
A
= +25°C, unless otherwise noted)
Rating
Symbol Value Unit
Input−Output Voltage Differential V
I
−V
O
40 Vdc
Power Dissipation
Case 221A
T
A
= +25°C
Thermal Resistance, Junction−to−Ambient
Thermal Resistance, Junction−to−Case
Case 936 (D
2
PAK)
T
A
= +25°C
Thermal Resistance, Junction−to−Ambient
Thermal Resistance, Junction−to−Case
P
D
q
JA
q
JC
P
D
q
JA
q
JC
Internally Limited
65
5.0
Internally Limited
70
5.0
W
°C/W
°C/W
W
°C/W
°C/W
Operating Junction Temperature Range T
J
−40 to +125 °C
Storage Temperature Range T
stg
−65 to +150 °C
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be affected.
ELECTRICAL CHARACTERISTICS (|V
I−
V
O
| = 5.0 V; I
O
= 0.5 A for T package; T
J
= T
low
to T
high
[Note 1]; I
max
and P
max
[Note 2].)
Characteristics
Figure Symbol Min Typ Max Unit
Line Regulation (Note 3), T
A
= +25°C, 3.0 V ≤ |V
I
−V
O
| ≤ 40 V 1 Reg
line
− 0.01 0.04 %/V
Load Regulation (Note 3), T
A
= +25°C, 10 mA ≤ I
O
≤ I
max
|V
O
| ≤ 5.0 V
|V
O
| ≥ 5.0 V
2 Reg
load
−
−
15
0.3
50
1.0
mV
% V
O
Thermal Regulation, T
A
= +25°C (Note 5), 10 ms Pulse Reg
therm
− 0.003 0.04 % V
O
/W
Adjustment Pin Current 3 I
Adj
− 65 100
mA
Adjustment Pin Current Change, 2.5 V ≤ |V
I
−V
O
| ≤ 40 V,
10 mA ≤ I
L
≤ I
max
, P
D
≤ P
max
, T
A
= +25°C
1, 2
DI
Adj
− 2.0 5.0
mA
Reference Voltage, T
A
= +25°C, 3.0 V ≤ |V
I
−V
O
| ≤ 40 V,
10 mA ≤ I
O
≤ I
max
, P
D
≤ P
max
, T
J
= T
low
to T
high
3 V
ref
−1.213
−1.20
−1.250
−1.25
−1.287
−1.30
V
Line Regulation (Note 3), 3.0 V ≤ |V
I
−V
O
| ≤ 40 V 1 Reg
line
− 0.02 0.07 %/V
Load Regulation (Note 3), 10 mA ≤ I
O
≤ I
max
|V
O
| ≤ 5.0 V
|V
O
| ≥ 5.0 V
2 Reg
load
−
−
20
0.3
70
1.5
mV
% V
O
Temperature Stability (T
low
≤ T
J
≤ T
high
) 3 T
S
− 0.6 − % V
O
Minimum Load Current to Maintain Regulation
(|V
I
−V
O
| ≤ 10 V)
(|V
I
−V
O
| ≤ 40 V)
3 I
Lmin
−
−
1.5
2.5
6.0
10
mA
Maximum Output Current
|V
I
−V
O
| ≤ 15 V, P
D
≤ P
max
, T Package
|V
I
−V
O
| ≤ 40 V, P
D
≤ P
max
, T
J
= +25°C, T Package
3 I
max
−
−
1.5
0.15
2.2
0.4
A
RMS Noise, % of V
O
, T
A
= +25°C, 10 Hz ≤ f ≤ 10 kHz N − 0.003 − % V
O
Ripple Rejection, V
O
= −10 V, f = 120 Hz (Note 4)
Without C
Adj
C
Adj
= 10 mF
4 RR
−
66
60
77
−
−
dB
Long−Term Stability, T
J
= T
high
(Note 6), T
A
= +25°C for
Endpoint Measurements
3 S − 0.3 1.0 %/1.0 k
Hrs.
Thermal Resistance, Junction−to−Case, T Package
R
q
JC
− 4.0 − °C/W
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
1. T
low
to T
high
= 0° to +125°C, for LM337T, D2T. T
low
to T
high
= −40° to +125°C, for LM337BT, BD2T.
2. I
max
= 1.5 A, P
max
= 20 W
3. Load and line regulation are specified at constant junction temperature. Change in V
O
because of heating effects is covered under the
Thermal Regulation specification. Pulse testing with a low duty cycle is used.
4. C
Adj
, when used, is connected between the adjustment pin and ground.
5. Power dissipation within an IC voltage regulator produces a temperature gradient on the die, affecting individual IC components on the die.
These effects can be minimized by proper integrated circuit design and layout techniques. Thermal Regulation is the effect of these
temperature gradients on the output voltage and is expressed in percentage of output change per watt of power change in a specified time.
6. Since Long Term Stability cannot be measured on each device before shipment, this specification is an engineering estimate of average
stability from lot to lot.
