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| NTE1929 3 Terminal Adjustable Positive Voltage Regulator 1.2V to 33V, 3A Description: The NTE1929 is an adjustable 3-terminal positive voltage regulator in a TO220 type package capable of supplying in excess of 3A over an output voltage range of 1.2V to 33V. This device employes internal current limiting, thermal shutdown, and safe area compensation making the it essentially blow-out proof. The NTE1929 serves a wide variety of applications including local, on card regulation. This device also makes an especially simple adjustable switching regulator, a programmable output regulator, and can also be used as a precision current regulator. Features: D Guaranteed 3A Output Current D Output Adjustable Between 1.2V and 33V D Load Regulation Typically 0.1% D Line Regulation Typically 0.005%/V D Internal Thermal Overload Protection D Internal Short-Circuit Current Limiting Constant with Temperature D Floating Operation for High Voltage Applications D Standard 3-Lead TO220 Type Transistor Package D Eliminates Stocking many Fixed Voltages Absolute Maximum Ratings: Input-Output Voltage Differential, VI-VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35V Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally Limited Operating Junction Temperature Range, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to +125C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65 to +150C Lead Temperature (During Soldering, 10sec), TL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300C Thermal Resistance, Junction-to-Case, RthJC Peak (Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3C/W Max Average (Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5C/W Typ Note 1. Thermal Resistance evaluated measuring the hottest temperature on the die using an infrared scanner. This method of evaluation yields very accurate thermal resistance values which are conservativeompared to other measurement techniques. Note 2. The average die temperature is used to derive the value of thermal resistance junction to case (average). Electrical Characteristics: (VI-VO = 5V, IL = 1.5A, TJ = 0 to +125C, Pmax = 25W unless otherwise specified) Parameter Line Regulation Symbol Regline Regload Test Conditions 3V VI-VO 35V, Note 3 10mA IL 3A, VO 5V, Note 3 10mA IL 3A, VO 5V, Note 3 Thermal Regulation Adjustment Pin Current Adjustment Pin Current Change Reference Voltage Temperature Stability Minimum Load Current to Maintain Regulation Maximum Output Current TA = +25C TA = +25C TA = +25C Min - - - - - - - - 3V VI-VO 35V, 10mA IL 3A, PD = Pmax 3V VI-VO 35V, 10mA IL 3A, PD = Pmax 0 TJ +125C VI-VO = 35V VI-VO 10V, PD Pmax VI-VO = 30V, PD Pmax, TA = +25C RMS Noise, % of VO Ripple Rejection N RR 10Hz f 10kHz, TA = +25C VO = 10V, f = 120Hz, Note 4 CAdj = 10F - 1.20 - - 3.0 0.25 - - 66 - Typ 0.005 0.02 5.0 20 0.1 0.3 0.002 50 0.2 1.25 1.0 3.5 4.5 1.0 0.003 65 80 0.3 Max 0.03 0.07 25 70 0.5 1.5 - 100 5.0 1.30 - 10 - - - - - 1.0 Unit %/V %/V mV mV % VO % VO % VO/W A A V % VO mA A A % VO dB dB %/1.0k Hrs. Load Regulation Regtherm TA = +25C, Pulse = 20ms IAdj IAdj Vref TS ILmin Imax Long-Term Stability S TJ = +125C, Note 5, TA = +25C for Endpoint Measurements Note 3. 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. Note 4. CAdj, when used, is connected between the adjustment pin and GND. Note 5. Since Long-Term Stability cannot be measured on each device before shipment, this specification is an engineering estimate of average stability from lot to lot. .420 (10.67) Max .110 (2.79) Tab .147 (3.75) Dia Max .500 (12.7) Max .250 (6.35) Max .500 (12.7) Min VIN VOUT/TAB .070 (1.78) Max Adjust .100 (2.54) |
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