NTE1951 Integrated Circuit Positive 3 Terminal Voltage Regulator, Low Dropout Voltage, 5V, 1A Description: The NTE1951 positive voltage regulator features the ability to source 1A of output current with a dropout voltage of typically 0.5V and a maximum of 1V over the entire temperature range. Furthermore, a quiescent current reduction circuit has been included which reduces the ground current when the differential between the input voltage and the output voltage exceeds approximately 3V. The quiescent current with 1A of output current and an input–output differential of 5V is therefore only 30mA. High quiescent currents only exist when the regulator is in the dropout mode (VIN – VOUT ≤ 3V). Features: D Dropout Voltage: 0.5V (Typ) @ IO = 1A D Output Current in Excess of 1A D Reverse Battery Protection D Internal Short Circuit Current Limit Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Input Voltage, VI Survival Voltage (≤100ms) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60V Operational Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26V Internal Power Dissipation (Note 1), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internally Limited maximum Junction Temperature, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150°C Operating Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40° to +125°C Storage Junction Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +150°C Lead Temperature (During Soldering, 10sec max), TL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +230°C Note 1. Thermal resistance without a heatsink for junction–to–case temperature is 3°C/W. Thermal resistance case–to–ambient is 50°C/W Electrical Characteristics: (VIN = 10V, IO = 1A, COUT = 22µF, CO = 0.1µF, TJ = +25°C unless otherwise specified) Parameter Symbol Test Conditions 5mA ≤ IO ≤ 1A Min Typ Max Unit 4.85 5.00 5.15 V Output Voltage VOUT Line Regulation Regline 7V ≥ VIN ≥ 26V, IO = 5 mA – 20 50 mV Load Regulation Regload 50mA ≤ IO ≤ 1A – 35 50 mV 100mADC and 20mArms, fo = 120Hz – 35 – MΩ 7V ≥ VIN ≥ 26V, IO = 5 mA – 10 15 mA VIN = 10V, IO = 1A – 30 45 mA Output Impedance ZO Quiescent Current Output Noise Voltage Vn 10Hz – 100kHz, IO = 5mA – 150 – µVrms Ripple Rejection RR fo = 120Hz, 1Vrms, II = 100mA 60 72 – dB – 20 – mV/1000Hr IO = 1A – 0.5 0.8 V IO = 100mA – 110 150 mA 1.6 1.9 – A 60 75 – V 26 31 – Vdc Long Term Stability Dropout Voltage Short Circuit Current Maximum Line Transient S VIN–VO ISC VO ≤ 6V, RO = 100Ω, T ≤ 100ms Maximum Operational Input Voltage Reverse Polarity Input Voltage DC RO = 100Ω –15 –30 – V Reverse Polarity Input Voltage Transient T ≤ 100ms, RO = 100Ω –50 –75 – V .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 VOUT .100 (2.54) GND