NTE970
Linear Integrated Circuit
3Terminal Adjustable Positive Voltage Regulator
1.2V to 33V, 3A
Description:
The NTE970 is an adjustable 3terminal positive voltage regulator in a TO3 type package capable
of supplying in excess of 3 Amps over a 1.2V to 33V output range.
Features:
D
Adjustable Output Down to 1.2V
D
Guaranteed 3A Output Current
D
Line Regulation Typically 0.005%/V
D
Load Regulation Typically 0.1%
D
Thermal Regulation
D
Current Limit Constant with Temperature
Absolute Maximum Ratings:
InputOutput Voltage Differential, V
I
V
O
35V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Dissipation, P
D
Internally Limited
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Junction Temperature Range, T
J
0
to +125
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, T
stg
65
to +150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermal Resistance, JunctiontoCase, R
thJC
2.5
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead Temperature (During Soldering, 10sec), T
L
+300
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Characteristics: (V
I
V
O
= 5V, I
O
= 1.5A, P
max
= 30W, 0
T
J
+125
C unless
otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Line Regulation
Reg
line
T
A
= +25
C, 3V
V
I
V
O
35V, Note 1
0.005
0.030
%/V
Load Regulation
Reg
load
V
O
5V
T
A
= +25
C, 0mA
I
O
3A,
5
25
mV
V
O
5V
Note 1
0.1
0.5
%V
O
Note 1. Regulation is measured at constant junction temperature. Change in output voltage due to
heating effects must be taken into account separately. Pulse testing with low duty cycle is
used.
Electrical Characteristics (Cont'd): (V
I
V
O
= 5V, I
O
= 1.5A, P
max
= 30W, 0
T
J
+125
C
unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Thermal Regulation
Reg
therm
T
A
= +25
C, Pulse = 20ms
0.002
%V
O
/W
Adjustment Pin Current
I
Adj
50
100
A
Adjustment Pin Current Change
I
Adj
10mA
I
L
3A, 3V
(V
I
V
O
)
35V
0.2
5.0
A
Reference Voltage
V
ref
10mA
I
O
3A, 3V
(V
I
V
O
)
35V,
P
30W
1.20
1.25
1.30
V
Line Regulation
Reg
line
3V
(V
I
V
O
)
35V, Note 1
0.02
0.07
%/V
Load Regulation
Reg
load
V
O
5V
10mA
I
O
3A, Note 1
20
70
mV
V
O
5V
0.3
1.5
%V
O
Temperature Stability
T
S
0
T
J
+125
C
1
%V
O
Minimum Load Current
I
Lmin
V
I
V
O
= 35V
3.5
10
mA
Maximum Output Current Limit
I
max
V
I
V
O
10V
3.0
4.5
A
V
I
V
O
= 30V
1.0
A
RMS Noise, % of V
O
N
T
A
= +25
C, 10Hz
f
10kHz
0.003
%V
O
Ripple Rejection Ratio
RR
V
O
= 10V, f = 120Hz
65
dB
C
Adj
= 10
F
66
86
dB
Long Term Stability
S
T
A
= +125
C
0.3
1.0
%/1.0k
Note 1. Regulation is measured at constant junction temperature. Change in output voltage due to
heating effects must be taken into account separately. Pulse testing with low duty cycle is
used.
1.187 (30.16)
.875 (22.2)
Dia Max
.665
(16.9)
.430
(10.92)
Seating
Plane
.040 (1.02)
.312 (7.93) Min
.135 (3.45) Max
.350 (8.89)
V
IN
V
OUT
/Case
Adjust
.215 (5.45)
.525 (13.35) R Max
.156 (3.96) Dia
(2 Holes)
.188 (4.8) R Max
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