NTE935 Integrated Circuit 3Terminal Adjustable Positive Voltage Regulator 1.2V to 32V, 5A Description: The NTE935 is an adjustable 3terminal positive voltage regulator in a TO3 type package capable of supplying in excess of 5A over a 1.2V to 32V output range. This device is exceptionally easy to use. A unique feature of the NTE935 is its time dependent current limiting. The current limit circuitry allows peak currents of up to 12A to be drawn from the regulator for short periods of time. Also included on the chip are thermal overload protection and safe area protection for the power transistor. Overload protection remains functional even if the adjustment pin is accidently disconnected. Normally, no capacitors are needed unless the device is situated far from the input filter capacitors in which case an input bypass is needed. An optional output capacitor can be added to improve tran- sient response. The adjustment terminal can be bypassed to achieve very high ripple rejections ratios which are difficult to achieve with standard 3terminal regulators. Features: Guaranteed 7A Peak Output Current Guaranteed 5A Output Current Adjustable Output Down to 1.2V Line Regulation Typically 0.005%/V Load Regulation Typically 0.1% Guaranteed Thermal Regulation Output is Short Circuit Protected Current Limit Constant with Temperature Standard 3Lead Transistor Package. Absolute Maximum Ratings: Power Dissipation, P . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally limited D InputOutput Voltage Differential, V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35V IO Operating Junction Temperature Range, T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to +125C J Storage Temperature Range, T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 to +150C stg Lead Temperature (During Soldering, 10 seconds), T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300C L Thermal Resistance, JunctiontoCase, R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.0C/W thJC Thermal Resistance, JunctiontoAmbient, R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35C/W thJAElectrical Characteristics: (+25C TJ +150C, V V = 5V and I = 2.5A, Note 1 IN OUT OUT unless otherwise specified) Parameter Test Conditions Min Typ Max Unit Line Regulation 3V (V V 35V, I = 0.01A, Note 2 0.02 0.06 %/V IN OUT) L 3V (V V 35V, I = 0.01A, T = +25C, Note 2 0.005 0.03 %/V IN OUT) L A Load Regulation 10mA I 5A, Note 2 0.3 1.0 % OUT 10mA I 5A, T = +25C, Note 2 0.1 0.5 % OUT A Thermal Regulation Pulse = 20ms, T = +25C 0.002 0.02 %/W J Adjustment Pin Current 45 100 A Adjustment Pin Current Change 10mA I 5A, 3V (V V ) 35V 0.2 5.0 A L IN OUT Reference Voltage 3 (V V ) 35V, 10mA I 5A, P 50W, 1.19 1.24 1.29 V IN OUT OUT Note 3 Temperature Stability T T T 1 % MIN J MAX Minimum Load Current (V V ) = 35V 3.5 10 mA IN OUT Current Limit (V V ) 10V 5.0 8.0 A IN OUT (V V ) 30V 1.0 A IN OUT RMS Output Noise, % of V T = +25C, 10Hz f 10kHz 0.003 % OUT J Ripple Rejection Ratio V = 10V, f = 120Hz 60 dB OUT C = 10 F 60 75 dB ADJ Long Term Stability T = +125C 0.3 1.0 % J Note 1. Power dissipation is internally limited, these specifications are applicable for power dissipations up to 50W. Note 2. Regulation is measured at constant junction temperature. Changes in output voltage due to heating effects are taken into account separately by thermal regulation. Note 3. Selected devices with tightened tolerance reference voltage. .135 (3.45) Max .350 (8.89) .875 (22.2) Dia Max Seating Plane .312 (7.93) Min .040 (1.02) V 1.187 (30.16) IN .665 .215 (5.45) (16.9) .156 (3.96) Dia (2 Holes) .430 (10.92) .188 (4.8) R Max .525 (13.35) R Max Adjust V /Case OUT