NTE988
Integrated Circuit
Positive 3 Terminal Voltage Regulator, 100mA
Description:
The NTE988 is a 3terminal positive voltage regulator in a TO92 type package and employs internal
currentlimiting and thermal shutdown, making it essentially indestructible. If adequate heat sinking
is provided, this device can deliver up to 100mA output current. The NTE988 is intended for use as
a fixed voltage regulator in a wide range of applications including local (oncard) regulation for elimi-
nation of noise and distribution problems associated with singlepoint regulation. In addition, this de-
vice can be used with power pass elements to make a high current voltage regulator. When used as
a Zener diode/resistor combination replacement, the NTE988 offers an effective output impedance
improvement of typically two orders of magnitude, along with lower quiescent current and lower noise.
Features:
D
Output Current up to 100mA
D
No External Components
D
Internal Thermal Overload Protection
D
Internal Short Circuit CurrentLimiting
D
Output Voltage Tolerance of
5% over the Temperature Range
Absolute Maximum Ratings:
Input Voltage, V
IN
35V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Internal Power Dissipation, P
D
Internally Limited
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Junction Temperature Range, T
A
0
C to +125
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, T
stg
65
C to +150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead Temperature (Soldering, 10 sec), T
L
+265
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Characteristics: (0
T
J
+125
C, V
IN
= 12V, I
O
= 40mA, C
IN
= 0.33
F, C
O
= 0.1
F,
Note 1 unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Output Voltage
V
O
T
J
= +25
C
5.95
6.20
6.45
V
Line Regulation
V
R(LINE)
T
J
= +25
C
8.5V
V
I
20V
65
175
mV
9.0V
V
I
20V
55
125
mV
Note 1. 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 represents pulse test
conditions with junction temperatures as indicated at the initiation of the tests.
Electrical Characteristics (Cont'd): (0
T
J
+125
C, V
IN
= 12V, I
O
= 40mA, C
IN
= 0.33
F,
C
O
= 0.1
F, Note 1 unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Load Regulation
V
R(LOAD)
T
J
= +25
C
1mA
I
O
100mA
13
80
mV
1mA
I
O
40mA
6
40
mV
Output Voltage (Note 2)
V
O
8.5V
V
I
20V
1mA
I
O
40mA
5.9
6.5
V
8.5V
V
I
V
Max
1mA
I
O
70mA
5.9
6.5
V
Quiescent Current
I
Q
2.0
5.5
mA
Quiescent Current Change
With Line
I
Q
8.0V
V
I
20V
1.5
mA
With Load
1mA
I
O
40mA
0.1
mA
Noise
N
O
T
A
= +25
C, 10Hz
f
100kHz
50
V
Ripple Rejection
V
I
/
V
O
f = 120Hz, 10V
V
I
20V, T
J
= +25
C
40
46
dB
Dropout Voltage
V
DO
T
J
= +25
C
1.7
V
Peak Output/Output
Short Circuit Current
I
pk
/I
OS
T
J
= +25
C
140
mA
Average Temperature
Coefficient of Output
Voltage
V
O
/
T
I
O
= 5mA
0.75
mV/
C
Note 1. 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 represents pulse test
conditions with junction temperatures as indicated at the initiation of the tests.
Note 2. Power Dissipation
0.75W.
.021 (.445) Dia Max
GND
Seating Plane
.135 (3.45) Min
.100 (2.54)
.050 (1.27)
.105 (2.67) Max
.105 (2.67) Max
.205 (5.2) Max
.210
(5.33)
Max
.500
(12.7)
Min
.165
(4.2)
Max
V
IN
V
OUT
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