NTE950/NTE951/NTE977
Integrated Circuit
Positive 3 Terminal Voltage Regulator, 100mA
Description:
The NTE950, NTE951, and NTE977 are positive 3terminal voltage regulators in available in a TO92
type package. With adequate heat sinking these regulators can deliver 100mA output current. Cur-
rent limiting is included to limit peak output current to safe value. Safe area protection for the output
transistors is provided to limit internal power dissipation. If internal power dissipation becomes too
high for the heat sinking provided, the thermal shutdown circuit takes over preventing the IC from
overheating.
When used as a zener diode/resistor combination replacement, these devices usually result in an ef-
fective output impedance improvement of two orders of magnitude, and lower quiescent current.
These regulators can provide local on card regulation, eliminating the distribution problems
associated with single point regulation. Typical applications include use in logic systems, instrumen-
tation, HiFi, and other solid state electronic equipment. Although designed primarily as fixed voltage
regulators these devices can be used with external components to obtain adjustment voltages and
currents.
Features:
D
Output Voltage Tolerances of
5% over the Temperature Range
D
Output Current of 100mA
D
Internal Thermal Overload Protection
D
Output Transistor Safe Area Protection
D
Internal Short Circuit Current Limit
Absolute Maximum Ratings:
Output Voltage, V
OUT
NTE977
5V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NTE950
12V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NTE951
15V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Voltage, V
IN
NTE977
30V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NTE950, NTE951
35V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Internal Power Dissipation (Note 1), P
D
Internally Limited
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Temperature Range, T
opr
0
C to +70
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum Junction Temperature, T
J
+125
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, T
stg
55
C to +150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead Temperature (Soldering, 10 sec), T
L
+260
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Note 1. Thermal resistance is typically +60
C/W junction to case, +232
C/W junction to ambient, and
+88
/
C/W junction to ambient at 400ft min of air. The maximum junction temperature shall
not exceed +125
C on Electrical parameters.
Electrical Characteristics: (T
J
= 0
to +125
C, I
O
= 40mA, C
IN
= 0.33
F, C
O
= 0.1
F, Note 2
unless otherwise specified)
NTE Type Number
NTE977
NTE950
NTE951
Input Voltage (unless otherwise specified)
V
IN
= 10V
V
IN
= 19V
V
IN
= 23V
Parameter
Symbol
Test Conditions
Min
Typ
Max
Min
Typ
Max
Min
Typ
Max
Unit
Output Voltage
V
O
T
J
= +25
C
4.8
5.0
5.2
11.5
12.0
12.5
14.4
15.0
15.6
V
(Note 4)
1mA
I
O
70mA
4.75
5.25
11.4
12.6 14.25
15.75
V
1mA
I
O
70mA
4.75
5.25
11.4
12.6 14.25
15.75
V
V
MIN
V
IN
V
MAX
(7
V
IN
20)
(14.5
V
IN
27)
(17.5
V
IN
30)
Line Regulation
V
O
T
J
= +25
C
10
54
20
110
25
140
mV
(8
V
IN
20)
(16
V
IN
27)
(20
V
IN
30)
V
18
75
30
180
37
250
mV
(7
V
IN
20)
(14.5
V
IN
27)
(17.5
V
IN
30)
V
Load Regulation
V
O
T
J
= +25
C,
1mA
I
O
40mA
5
30
10
50
12
75
mV
T
J
= +25
C,
1mA
I
O
100mA
20
60
30
100
35
150
mV
Long Term Stability
V
O
12
24
30
1000Hrs
mV
Quiescent Current
I
Q
T
J
= +25
C
3
5
3
5
3.1
5
mA
T
J
= +125
C
4.7
4.7
4.7
mA
Quiescent Current
I
Q
1mA
I
O
40mA
0.1
0.1
0.1
mA
Change
V
MIN
V
IN
V
MAX
1.0
1.0
1.0
mA
(8
V
IN
20)
(16
V
IN
27)
(20
V
IN
30)
V
Output Noise
Voltage
V
n
T
J
= +25
C, Note 3,
f = 10Hz to 10kHz
40
80
90
V
Ripple Rejection
V
IN
f = 120Hz
47
62
40
54
37
51
dB
V
OUT
IN
(8
V
IN
16)
(15
V
IN
25)
(18.5
V
IN
28.5)
V
Input Voltage
Required to
Maintain Line
Regulation
T
J
= +25
C
7
14.5
17.5
V
Note 2. The maximum steady state usable output current and input voltage are very dependent on
the heat sinking and/or lead length of the package. The data above represent pulse test
conditions with junction temperatures as indicated at the initiation of test.
Note 3. Recommended minimum load capacitance of 0.01
F to limit high frequency noise band-
width.
Note 4. The temperature coefficient of V
OUT
is typically within
0.01% V
O
/
C.
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