NTE931
Integrated Circuit
3鈥揟erminal Positive Voltage Regulator
5V, 3A
Description:
The NTE931 is a 3鈥搕erminal 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碌F solid tantalum capacitor should be used on the
input. A 0.1碌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
D
D
D
D
D
Output Current in Excess of 3A
Internal Current and Thermal Limiting
0.01鈩?Typical Output Impedance
7.5 Minimum Input Voltage
30W Power Dissipation
100% Electrical Burn鈥揑n
Absolute Maximum Ratings:
Input Voltage, V
IN
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20V
Power Dissipation, P
D
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally Limited
Operating Junction Temperature Range, T
J
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0擄 to +125擄C
Storage Temperature Range, T
stg
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?5擄 to +150擄C
Typical Thermal Resistance, Junction鈥搕o鈥揅ase (Note 1), R
thJC
. . . . . . . . . . . . . . . . . . . . . . . . . 2擄C/W
Lead Temperature (Soldering, 10 sec), T
L
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300擄C
Burn鈥揑n In Thermal Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100%
Note 1. Without a heatsink, thermal resistance is about 35擄C/W. With a heatsink, the effective thermal
resistance can only approach the specified value of 2擄C/W, depending on the effeciency of the
heatsink.
1
2
