NTE1957 Integrated Circuit Positive 3 Terminal Voltage Regulator, Low Dropout Voltage, 9V, 1A Description: The NTE1957 is a positive voltage regulator in a TO220 type package with a low input/output voltage. This device is suitable for low−voltage, battery−driven equipment, and home appliances and industrial equipment with great fluctuation of the supply voltage. Features: D Dropout Voltage Typically 0.5V @ IO = 1A D Output Current in Excess of 1A D Output Voltage Trimmed Before Assembly D Reverse Battery Protection D Internal Short Circuit Current Limit D Mirror Image Insertion Protection Absolute Maximum Ratings: (Note 1 unless otherwise specified) Supply Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26V Internal Power Dissipation (Note 2), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally Limited Maximum Junction Temperature, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150°C Operating Ambient Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −40° to +125°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65° to +150°C Lead Temperature (During Soldering, 10sec max.), TL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +260°C Thermal Resistance, Junction−to−Ambient, RthJA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60°C/W Thermal Resistance, Junction−to−Case, RthJC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4°C/W ESD Susceptibility (Note 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2kV Recommended Operating Conditions: (Note 1 unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Operating Supply Voltage Range VIN 10.5 − 26.0 V Temperature Range TJ −40 − +125 °C Note 1. Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Conditions are conditions under which the device functions but the specifications might not be guaranteed. For guaranteed specifications and test conditions, see the Electrical Characteristics. Note 2. The maximum allowable power dissipation is a function of the maximum junction temperature, TJ, the junction−to−ambient thermal resistance, RthJA, and the ambient temperature, TA. Exceeding the maximum allowable dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. The value of RthJA (for devices in still air with no heatsink) is +60/W. The effective value of RthJA can be reduced by using a heatsink. Note 3. ESD rating is based on the human body model, 100pF discharged through 1.5kΩ. Electrical Characteristics: (VIN = 14V, IO = 1A, TA = TJ = +25°C unless otherwise specified) Parameter Test Conditions Min Typ Max Unit 8.73 9.00 9.27 V Output Voltage 5mA ≤ IO ≤ 1A 8.55 9.00 9.45 V Line Regulation 11V ≤ VIN ≤ 26V, IO = 5mA − 20 90 mV Load Regulation 50mA ≤ IO ≤ 1A − 60 90 mV − − 150 mV Note 4 Note 4 Output Impedance 100mADC and 20mArms, fo = 120Hz − 60 − mΩ Quiescent Current 11V ≤ VIN ≤ 26V, IO = 5mA − 10 15 mA − − 20 mA − 30 45 mA − − 60 mA Note 4 VIN = 14V, IO = 1A Note 4 Output Noise Voltage fo = 10Hz to 100kHz, IO = 5mA − 270 − µVrms Ripple Rejection fo = 120Hz, 1Vrms, IO = 100 100mA A 52 64 − dB 46 − − dB − 34 − mV/1000 Hr − 0.8 − V − − 1.0 V − 110 150 mV Note 4 Long Term Stability Dropout Voltage IO = 1A Note 4 IO = 100mA − − 200 mV Short Circuit Current Note 5 Note 4 1.6 1.9 − A Maximum Line Transient RO = 100Ω, T ≤ 100ms 60 75 − V 60 − − V −15 −30 − V −15 − − V −50 −75 − V −50 − − V Note 4 Reverse Polarity DC Input Voltage RO = 100Ω Reverse Polarity Transient Input Voltage RO = 100Ω, T ≤ 100ms Note 4 Note 4 Note 4. Limits apply for 10.5V ≤ VIN ≤ 26V, −40° ≤ TJ ≤ +125°C. Note 5. Output current will decrease with increasing temperature but will not drop below 1A at the maximum specified temperature. .420 (10.67) Max .110 (2.79) .500 (12.7) Max .147 (3.75) Dia Max .250 (6.35) Max .070 (1.78) Max VIN .100 (2.54) .500 (12.7) Min VOUT GND