LM337AT Datasheet, PDF (2/10 Pages) ON Semiconductor – 1.5 A, Adjustable Output, Negative Voltage Regulator

LM337
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 (D²PAK)
T_A = +25°C
Thermal Resistance, Junction−to−Ambient
Thermal Resistance, Junction−to−Case
P_D
Internally Limited
W
q_JA
65
°C/W
q_JC
5.0
°C/W
P_D
Internally Limited
W
q_JA
70
°C/W
q_JC
5.0
°C/W
Operating Junction Temperature Range
T_J
−40 to +125
°C
Storage Temperature Range
T_stg
−65 to +150
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
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
50
mV
−
0.3
1.0
% 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 −1.250 −1.287
V
−1.20 −1.25 −1.30
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
70
mV
−
0.3
1.5
% 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
mA
−
1.5
6.0
−
2.5
10
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
A
−
1.5
2.2
−
0.15
0.4
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
dB
−
60
−
66
77
−
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_qJC
−
4.0
−
°C/W
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.
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