NTE1918 3 Terminal Positive Voltage Regulator 15V, 3A Description: The NTE1918 is a positive 3terminal voltage regulator in a TO3 type package capable of driving loads in excess of 3A. This device employs internal current limiting, thermal shutdown, and safearea compensation. Although designed primarily as a fixed voltage regulator, the NTE1918 can be used with external com- ponents to obtain adjustable voltages and currents. Features: Output Current in Excess of 3A Power Dissipation: 30W Internal Thermal Overload Protection Output Transistor Safe Area Protection Internal Short Circuit Current Limit No External Components Required Absolute Maximum Ratings: Input Voltage , V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40V IN Power Dissipation (T = +25C, Note 1), P . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally Limited A D Power Dissipation (T = +25C, Note 1), P . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally Limited C D Operating Junction Temperature Range, T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to +150C J Storage Temperature Range, T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 to +150C stg Thermal Resistance, JunctiontoCase, R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5C/W thJC Thermal Resistance, JunctiontoAmbient, R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35C/W thJA Note 1. Although power dissipation is internally limited, specifications apply only for P 30W. O Electrical Characteristics: (0 T +125C, V = 20V, I = 3Aunless otherwise specified) J IN O Parameter Symbol Test Conditions Min Typ Max Unit Output Voltage V T = +25C, 5mA I 3A 14.4 15.0 15.6 V O J O 5mA I 2A, 17.5V V 30V 14.25 15.00 15.75 V O IN Line Regulation Reg T = +25C, 20V V 26V, Note 2 7.5 55 mV line J IN 18V V 30V, I = 1A, Note 2 7.5 55 mV IN O Load Regulation Reg T = +25C, 5mA I 3A, Note 2 10 30 mV load J O 5mA I 3A, Note 2 15 80 mV O Note 2. Load and line regulation are specified at constant junction temperature. Change in V due O to heating effects must be taken into account separately. Pulse testing with low duty cycle is used.Electrical Characteristics (Contd): (0 T +125C, V = 20V, I = 3Aunless otherwise specified) J IN O Parameter Symbol Test Conditions Min Typ Max Unit Quiescent Current I T = +25C, 5mA I 3A 3.5 5.0 mA Q J O 5mA I 3A 4.0 6.0 mA O Quiescent Current Change I T = +25C, 17.6V V 40V, I = 5mA 0.3 1.0 mA Q J IN O 18V V 30V, I = 1A 0.3 1.0 mA IN O Output Noise Voltage V T = +25C, f = 10Hz to 100kHz 10 V n J Output Resistance r f = 1kHz 2 m O Short Circuit Current Limit I T = +25C, V = 40V 0.2 1.2 A sc A IN Ripple Rejection Ratio RR T = +25C, 18.5V V 28.5V, f = 120Hz, 55 65 dB J IN I = 2A O Dropout Voltage T = +25C, I = 3A 2.2 2.5 V J O Peak Output Current I max T = +25C 5 A O J Average Temperature I = 5mA 0.6 mV/C O Coefficient of Output Voltage Note 2. Load and line regulation are specified at constant junction temperature. Change in V due O to heating effects must be taken into account separately. Pulse testing with low duty cycle is used. .135 (3.45) Max .350 (8.89) .875 (22.2) Dia Max Seating Plane .312 (7.93) Min .040 (1.02) V OUT 1.187 (30.16) .665 .215 (5.45) (16.9) .188 (4.8) R Max .156 (3.96) Dia (2 Holes) .430 (10.92) .525 (13.35) R Max V Common/Case IN