NTE1942 Integrated Circuit Positive Adjustable Voltage Regulator, 2.85V to 36V, 2A Description: The NTE1942 is an integrated circuit for voltage and current programmable regulation. Current limit- ing, power limiting, thermal shutdown, and input overvoltage protection (up to 60V) make the NTE1942 virtually blowout proof. The NTE1942 can be used to replace fixed voltage regulators when high output voltage precision is required. Features: Adjustable Output Current Up to 2A (Guaranteed Up to T = +150C) J Adjustable Output Voltage Down to 2.85V Input Overvoltage Protection (Up to 60V, 10ms) Short Circuit Protection Output Transistor S.O.A. Protection Thermal Overload Protection Low Bias Current On Regulation Terminal Low Standby Current Drain Absolute Maximum Ratings: DC Input Voltage, V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40V i Peak Input Voltage (10ms), V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60V i InOut Operating Differential Voltage, V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32V io Output Current, I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . internally limited o Power Dissipation, P . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . internally limited tot Storage Temperature Range, T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 to +150C stg Operating Junction Temperature Range, T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 to +150C J Maximum Thermal Resistance, JunctiontoCase, R . . . . . . . . . . . . . . . . . . . . . . . . . . . . +3C/W thJC Maximum Thermal Resistance, JunctiontoAmbient, R . . . . . . . . . . . . . . . . . . . . . . . . +50C/W thJAElectrical Characteristics: (T = 25 to +150C unless otherwise specified) J Parameter Symbol Test Conditions Min Typ Max Unit GENERAL Quiescent Drain Current I V = 20V, T = +25C 4.2 9.2 mA d i J (Pin3) Output Noise Voltage e V = V , I = 10mA, B = 1MHz 80 V N o ref o VOLTAGE REGULATION LOOP Reference Voltage (Pin4) V V = 20V, I = 10mA, T = +25C 2.65 2.77 2.85 V ref i o J Average Temperature V V = 20V, T = 25 to +125C 0.25 mV/C J ref i Coefficient of T I = 10mA o T = +125 to +150C 1.5 mV/C J Reference Voltage Output Voltage Range V I = 10mA, T = +25C 2.85 36 V o o J I =2.0A, Note 1 0.15 1.0 % Voltage Load Regulation V o o V o I =1.5A, Note 1 1.0 0.5 % o Supply Voltage Rejection SVR V = 5V, I = 500mA, V = 100V , 60 70 dB o o i pp Ratio f = 100Hx, Note 2 Line Regulation V V = 5V, I = 500mA, V = 8V to 18V, 54 70 dB i o o i V T = +25C o J 3 Output Impedance Z V = 10V, V = V , I = 0.5A, 1.5 x 10 o i o ref o f = 100Hz Dropout Voltage between 2.0 2.5 V V o I 1.5A, 2% o = Pin1 and Pin5 V o Bias Current at Pin4 I T = +25C 3 10 A 4 J Average Temperature I 0.5 %/C 4 Coefficient (Pin4) T I 4 CURRENT REGULATION LOOP Current Limit Sense V V = 10V, V = V , T = +25C 0.45 V SC i o ref J Voltage between Pin5 and Pin2 Average Temperature 0.03 %/C Coefficient of V SC I = 0.5A 1.4 % Current Load Regulation I V = 10V, o o i I V = 3V o o I = 1.0A 1.0 % o I = 1.5A 0.9 % o Short Circuit Current I V V = 14V, 2.0 2.5 3.6 A sc i o Pin2 and Pin5 short circuited Note 1. A load step of 2A can be applied provided that the inputoutput differential voltage is lower than 20V. Note 2. The same performance can be maintained at higher output levels if a bypassing capacitor is provided between Pin2 and Pin4.