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NTE931 Integrated Circuit 3-Terminal Positive Voltage Regulator 5V, 3A
Description: The NTE931 is a 3-terminal 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 1F solid tantalum capacitor should be used on the input. A 0.1F 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 Typical Output Impedance 7.5 Minimum Input Voltage 30W Power Dissipation 100% Electrical Burn-In
Absolute Maximum Ratings: Input Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20V Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally Limited Operating Junction Temperature Range, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to +125C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65 to +150C Typical Thermal Resistance, Junction-to-Case (Note 1), RthJC . . . . . . . . . . . . . . . . . . . . . . . . . 2C/W Lead Temperature (Soldering, 10 sec), TL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300C Burn-In In Thermal Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100% Note 1. Without a heatsink, thermal resistance is about 35C/W. With a heatsink, the effective thermal resistance can only approach the specified value of 2C/W, depending on the effeciency of the heatsink.
Electrical Characteristics: (TJ = 0 to +125C, Note 2 unless otherwise specified)
Parameter Output Voltage Symbol VO Regline Regload IB Vn Test Conditions TJ = +25C, VIN = 7.5V, IO = 0A VIN = 7.5V to 15V, IO = 0A to 3A, P 30W Line Regulation Load Regulation Quiescent Current Output Noise Voltage Short Circuit Current Limit TJ = +25C, VIN = 7.5V to 15V, Note 3 TJ = +25C, VIN = 7.5V, IO = 0A to 3A, Note 3 VIN = 7.5V to 15V, IO = 0A to 3A TJ = +25C, f = 10Hz to 100kHz TJ = +25C, VIN = 15V TJ = +25C, VIN = 7.5V Long Term Stability Min 4.8 4.75 - - - - - - - Typ 5.0 5.00 5 25 12 40 3.0 4.0 - Max 5.2 5.25 25 100 20 - 4.5 5.0 35 Unit V V mV mV mA Vrms A A 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%.
Pin Connection Diagram
.135 (3.45) Max .350 (8.89) .875 (22.2) Dia Max Seating Plane
Output
.312 (7.93) Min
2
VOUT
.040 (1.02) 1.187 (30.16) .665 (16.9) .156 (3.96) Dia (2 Holes) .430 (10.92) .188 (4.8) R Max
1
.215 (5.45)
Input Case/GND
VIN
.525 (13.35) R Max GND/Case

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