NTE972 Integrated Circuit 3-Terminal Positive Voltage Regulator, 24V
The NTE972 fixed-voltage regulator is a monolithic integrated circuit in a TO220 type package designed for use in a wide variety of applications including local, on-card regulation. This regulator employs internal current limiting, thermal shutdown, and safe-area compensation. With adequate heatsinking it can deliver output currents in excess of 1.0 ampere. Although designed primarily as a fixed voltage regulator, this device can be used with external components to obtain adjustable voltages and currents. Features: D Output Current in Excess of 1.0 Ampere D No External Components Reguired D Internal Thermal Overload Protection D Internal Short-Circuit Current Limiting D Output Transistor Safe-Area Compensation Absolute Maximum Ratings: (TA = +25C unless otherwise specified) Input Voltage, Vin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40Vdc Power Dissipation (TA = +25C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally Limited Derate above +25C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15.4mW/C Power Dissipation (TC = +25C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally Limited Derate above +75C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200mW/C Thermal Resistance, Junction-to-Ambient, RthJA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65C/W Thermal Resistance, Junction-to-Case, RthJC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5C/W Operating Junction Temperature Range, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to +150C Storage Junction Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65 to +150C Electrical Characteristics: (Vin = 33V, IO = 500mA, TJ = 0 to +125C unless otherwise specified)
Parameter Output Voltage Symbol VO Regline Regload TJ = +25C 5mA IO 1A, PO 15W, 27V Vin 38V Line Regulation TJ = +25C, Note 1 TJ = +25C, Note 1 27V Vin 38V 30V Vin 36V Load Regulation 5mA IO 1.5A 250mA IO 750mA Test Conditions Min 23 Typ 24 Max 25 Unit V V mV mV mV mV
22.8 24.0 25.2 - - - - 31 14 60 25 480 240 480 240
Note 1. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately. Pulse testing with low duty cycle is used.
Electrical Characteristics (Cont'd): (Vin = 33V, IO = 500mA, TJ = 0 to +125C unless otherwise specified)
Parameter Quiescent Current Quiescent Current Change Symbol IB IB RR Vin - VO Vn rO Isc Imax TCVO TJ = +25C 27V Vin 38V 5mA IO 1A Ripple Rejection Dropout Voltage Output Noise Voltage Output Resistance Short-Circuit Current Limit Peak Output Current Average Temperature Coefficient of Output Voltage 28V Vin 38V, f = 120Hz TJ = +25C, IO = 1A TA = +25C, 10Hz f 100kHz f = 1kHz TA = +25C, Vin = 35V TJ = +25C Test Conditions Min - - - - - - - - - - Typ 4.6 - - 54 2 10 20 0.2 2.2 -1.5 Max 8.0 1.0 0.5 - - - - - - - Unit mA mA mA dB V V/VO m A A mV/C
.420 (10.67) Max .110 (2.79) GND .147 (3.75) Dia Max .500 (12.7) Max
.250 (6.35) Max .500 (12.7) Min .070 (1.78) Max VIN .100 (2.54) VOUT GND
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