NTE1979
Integrated Circuit
Negative 3 Terminal Voltage Regulator,
8V, 100mA
Description:
The NTE1979 is a 3terminal fixed negative output voltage regulatgor in a TO92 type package
designed for use in power circuits with current capacity up to 100mA. Stabilized fixed output voltage
is obtained from unstable DC input voltage without the use of external components.
Features:
D
No External Components
D
Output Current in Excess of 100mA
D
BuiltIn ShortCircuit Current Limiting
D
BuiltIn Thermal Overload Protection
Absolute Maximum Ratings: (T
A
= +25
C unless otherwise specified)
Input Voltage, V
I
35V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Dissipation (Note 1), P
D
650mW
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Ambient Temperature Range, T
opr
20
to +80
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, T
stg
55
to +150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Note 1. When T
J
exceeds +150
C, the internal circuit cuts off the output.
Electrical Characteristics: (T
A
= +25
C, V
I
= 14V, I
O
= 40mA, C
i
= 2
F, C
o
= 1
F unless
otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Output Voltage
V
O
T
J
= +25
C
7.68
8.0
8.32
V
Output Voltage Tolerance
V
O
V
I
= 11V to 23V, I
O
= 1mA to 70mA,
T
J
= 0
to +125
C
7.6
8.4
V
Line Regulation
REG
IN
V
I
= 10V to 24V, T
J
= +25
C
160
mV
V
I
= 11V to 21V, T
J
= +25
C
80
mV
Load Regulation
REG
L
I
O
= 1mA to 100mA, T
J
= +25
C
15
80
mV
I
O
= 1mA to 40mA, T
J
= +25
C
7
40
mA
Note 2. The specified condition T
J
= +25
C means that the test should be carried out with the test
time so short (within 10ms) that the drift in characteristic value due to the rise in chip junction
temperature can be ignored.
Electrical Characteristics (Cont'd):
(T
A
= +25
C, V
I
= 14V, I
O
= 40mA, C
i
= 2
F, C
o
= 1
F
unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Bias Current
I
BIAS
T
J
= +25
C
3
5
mA
Input Bias Current Fluctuation
I
BIAS(IN)
V
I
= 11V to 23V, T
J
= +25
C
0.5
mA
I
BIAS(L)
I
O
= 1mA to 40mA, T
J
= +25
C
0.1
mA
Output Noise Voltage
V
no
f = 10Hz to 100kHz, T
A
= +25
C
52
V
Ripple Rejection Ratio
RR
V
I
= 11V to 21V, f = 120Hz, T
A
= +25
C
54
dB
Minimum I/O Voltage Difference
V
DIF(min)
T
J
= +25
C
0.8
V
Output Short Circuit Current
I
O(Short)
V
I
= 35V, T
J
= +25
C
200
mA
Output Voltage Temperature
Coefficient
V
O
/T
A
I
O
= 5mA, T
J
= 0
to +125
C
0.6
mV/
C
Note 2. The specified condition T
J
= +25
C means that the test should be carried out with the test
time so short (within 10ms) that the drift in characteristic value due to the rise in chip junction
temperature can be ignored.
V
OUT
Common
V
IN
.135 (3.45) Min
Seating Plane
.021 (.445) Dia Max
.210
(5.33)
Max
.500
(12.7)
Min
.050 (1.27)
.165 (4.2) Max
.105 (2.67) Max
.100 (2.54)
.105 (2.67) Max
.205 (5.2) Max
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