NTE959 Linear Integrated Circuit Voltage Regulator, Negative, 18V, 1A Description: The NTE959 voltage regulator employs current limiting, thermal shutdown, and safearea com- pensation which makes it remarkably rugged under most operating conditions. With adequate heat sinking they can deliver output currents in excess of 1.0 amperes. Features: No External Components Required Internal Thermal Overload Protection Internal ShortCircuit Current Limiting Output Transistor SafeArea Compensation Absolute Maximum Ratings: (T = +25C unless otherwise specified) A Input Voltage, V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35V IN Internal Power Dissipation, P . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally Limited D Derate Above +25C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15.4mW/C Internal Power Dissipation (T = +25C), P . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally Limited C D Derate Above +75C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200mW/C Maximum Junction Temperature Range, T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 to +150C J Storage Temperature Range, T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 to +150C stg Thermal Resistance, JunctiontoAmbient, R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65C/W thJA Thermal Resistance, JunctiontoCase, R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5C/W thJC Electrical Characteristics: (V = 27V, I = 500mA, T = 0 to +125C unless otherwise specified) IN O J Parameter Symbol Test Conditions Min Typ Max Unit Output Voltage V T = +25C 17.3 18.0 18.7 V O J 5mA I 1A, P 15W, 17.1 18.0 18.9 V O O 33V V 21V IN Line Regulation Reg T = +25C, 33V V 21V 25 360 mV Line J IN Note 1 30V V 24V 10 180 IN Load Regulation Reg T = +25C, 5mA I 1.5A 55 360 mV Load J O Note 1 250mA I 750mA 22 180 OElectrical Characteristics: (V = 27V, I = 500mA, T = 0 to +125C unless otherwise specified) IN O J Parameter Symbol Test Conditions Min Typ Max Unit Quiescent Current I T = +25C 4.5 8.0 mA B J Quiescent Current Change I 33V V 21V 1.0 mA B IN 5mA I 1A 0.5 O Ripple Rejection RR 32V V 21V, f = 120Hz 57 dB IN Dropout Voltage V V T = +25C, I = 1A 2.0 V IN O J O Output Noise Voltage V T = +25C, 10Hz f 100kHz 10 V/V n A O Output Resistance r f = 1kHz 19 m O ShortCircuit Current Limit I T = +25C, V = 35V 0.2 A sc A IN Peak Output Current I T = +25C 2.2 A max J Average Temperature TCV 1.1 mV/C O Coefficient of Output Voltage Note 1. Load and line regulation are specified at constant junction temperature. Changes in V O due to heating effects must be taken into account spearately. Pulse testing with low duty cycle is used. .420 (10.67) Max .110 (2.79) .147 (3.75) .500 Dia Max (12.7) Max .250 (6.35) Max .500 (12.7) Min .070 (1.78) Max V GND OUT .100 (2.54) V /Tab IN