Datasheet

NTE1929
3 Terminal Adjustable Positive Voltage Regulator
1.2V to 33V, 3A
Description:
The NTE1929 is an adjustable 3–terminal positive voltage regulator in a TO220 type package capable
of supplying in excess of 3A over an output voltage range of 1.2V to 33V. This device employes inter-
nal current limiting, thermal shutdown, and safe area compensation making the it essentially blow–out
proof.
The NTE1929 serves a wide variety of applications including local, on card regulation. This device
also makes an especially simple adjustable switching regulator, a programmable output regulator,
and can also be used as a precision current regulator.
Features:
D Guaranteed 3A Output Current
D Output Adjustable Between 1.2V and 33V
D Load Regulation Typically 0.1%
D Line Regulation Typically 0.005%/V
D Internal Thermal Overload Protection
D Internal Short–Circuit Current Limiting Constant with Temperature
D Floating Operation for High Voltage Applications
D Standard 3–Lead TO220 Type Transistor Package
D Eliminates Stocking many Fixed Voltages
Absolute Maximum Ratings:
Input–Output Voltage Differential, V
I
–V
O
35V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead Temperature (During Soldering, 10sec), T
L
+300°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermal Resistance, Junction–to–Case, R
thJC
Peak (Note 1) 2.3°C/W Max. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Average (Note 2) 1.5°C/W Typ. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Note 1. Thermal Resistance evaluated measuring the hottest temperature on the die using an in-
frared scanner. This method of evaluation yields very accurate thermal resistance values
which are conservativeompared to other measurement techniques.
Note 2. The average die temperature is used to derive the value of thermal resistance junction to
case (average).