NTE931
Integrated Circuit
3Terminal Positive Voltage Regulator
5V, 3A
Description:
The NTE931 is a 3terminal fixed positive voltage regulator in a TO3 type package capable of driving
loads up to 3A. New circuit design and processing techniques are used to provide the high output
current without sacrificing the regulation characteristics of lower current devices.
This device is virtually blowout proof. Current limiting and thermal shutdown provide a high level of
reliability. No external components are required for operation of the NTE931, however, if the device
is more than 4 inches from the filter capacitor a 1
F solid tantalum capacitor should be used on the
input. A 0.1
F or larger capacitor may be used on the output to reduce load transient spikes created
by fast switching digital logic, or to swamp out stray load capacitance.
An overall worst case specification for the combined effects of input voltage, load current, ambient
temperature, and power dissipation ensures that the NTE931 will perform satisfactory as a system
element.
Features:
D
Output Current in Excess of 3A
D
Internal Current and Thermal Limiting
D
0.01
Typical Output Impedance
D
7.5 Minimum Input Voltage
D
30W Power Dissipation
D
100% Electrical BurnIn
Absolute Maximum Ratings:
Input Voltage, V
IN
20V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical Thermal Resistance, JunctiontoCase (Note 1), R
thJC
2
C/W
. . . . . . . . . . . . . . . . . . . . . . . . .
Lead Temperature (Soldering, 10 sec), T
L
+300
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BurnIn In Thermal Limit
100%
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Note 1. Without a heatsink, thermal resistance is about 35
C/W. With a heatsink, the effective thermal
resistance can only approach the specified value of 2
C/W, depending on the effeciency of the
heatsink.
Electrical Characteristics: (T
J
= 0
to +125
C, Note 2 unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Output Voltage
V
O
T
J
= +25
C, V
IN
= 7.5V, I
O
= 0A
4.8
5.0
5.2
V
V
IN
= 7.5V to 15V, I
O
= 0A to 3A, P
30W
4.75
5.00
5.25
V
Line Regulation
Reg
line
T
J
= +25
C, V
IN
= 7.5V to 15V, Note 3
5
25
mV
Load Regulation
Reg
load
T
J
= +25
C, V
IN
= 7.5V, I
O
= 0A to 3A, Note 3
25
100
mV
Quiescent Current
I
B
V
IN
= 7.5V to 15V, I
O
= 0A to 3A
12
20
mA
Output Noise Voltage
V
n
T
J
= +25
C, f = 10Hz to 100kHz
40
V
rms
Short Circuit Current Limit
T
J
= +25
C, V
IN
= 15V
3.0
4.5
A
T
J
= +25
C, V
IN
= 7.5V
4.0
5.0
A
Long Term Stability
35
mW
Note 2. Although power dissipation is internally limited, specifiecations apply only for P
30W.
Note 3. Load and line regulation are specified at constant junction temperature. Pulse testing is
required with a pulse width of
1ms and a duty cycle of
5%.
Output
Input
Case/GND
2
1
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
OUT
GND/Case
V
IN
.215 (5.45)
.525 (13.35) R Max
.156 (3.96) Dia
(2 Holes)
.188 (4.8) R Max
Pin Connection Diagram
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