NTE1956 Integrated Circuit Positive 3 Terminal Voltage Regulator, Low Dropout Voltage, 24V, 1A Description: The NTE1956 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 Minimum Input/Output Voltage Difference: 0.5V Typ D On–Chip Overcurrent Limiter D On–Chip Thermal Protection Circuit D On–Chip Inrush Current Protection Circuit at the time of Input Voltage Start–Up D On–Chip Input Short–Circuit Protection Circuit (When the Input Pin is Short–Circuited to the Ground, the Circuit Between Pin1 and Pin3 is Shut Down to Prevent Current Flow) Applications: D Power Supply Equipment Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Supply Voltage (Note 1), VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30V Supply Current (Note 2), IIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.4A Power Dissipation (Note 3), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15W Operating Ambient Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –30° to +85°C Storage Junction Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55° to +150°C Thermal Resistance, Junction–to–Ambient, RthJA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65°C/W Thermal Resistance, Junction–to–Case, RthJC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5°C/W Note 1. At the application of VIN = 30V, the overvoltage protection may be operated by the ASO protection circuit, leading to the output shut down. Note 2. The current value does not exceed this criterion because of the on–chip current limiter. Note 3. The internal circuit shuts off the output when TJ ≤ +150°C (design value). Recommended Operating Conditions: (IO = 500mA, TA = +25°C unless otherwise specified) Parameter Operating Supply Voltage Range Symbol VIN Test Conditions Min Typ Max Unit 21.5 – 29.5 V Electrical Characteristics: (VIN = 25.5V, IO = 500mA, TA = +25°C unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit 23.28 24.0 24.72 V Output Voltage VOUT TJ = +25°C Line Regulation REGIN VIN = 25.5V to 29.5V, TJ = +25°C – 9.6 96 mV Load Regulation REGLOA VIN = 25.5V, IO = 0 to 1200mA, TJ = +25°C – 120 480 mV Input Dependency of Bias Current DIBias(IN) VIN = 25.5V to 29.5V, TJ = +25°C – 1 10 mA – 10 50 mA DIBias(LOA) IO = 0 to 1200mA, TJ = +25°C Load Dependency of Bias Current Bias Current at No Load IBias IO = 0mA – 2.6 5.0 mA Bias Current Before the Regulation Starts Irush VIN = 21.6V, IO = 0mA – 3 5 mA IO = 500mA – 0.4 0.6 V IO = 1200mA – 0.5 1.0 V VIN = 25.5V, TJ = +25°C, Note 4 1.2 1.8 2.4 A VIN = 25.5V to 27.5V, IO = 100mA, f= 120Hz 36 56 – dB VIN = 30V, TJ = +25°C, Shorted Load – 10 – mA VIN = 25.5V – 150 – °C TJ = +25° to +125°C – –40 – ppm/°C Minimum I/O Voltage Difference VDIF(min) Peak Output Current IO(Peak) Ripple Rejection Ratio RR VIN = 21.6V, TJ = +25°C ° Design Reference Data (Note 5) Output Short–Circuit Current IO(Short) Thermal Protection Operating Temperature TJ(TH) Output Voltage Temperature Coefficient a Note 4. This current exceeds PDmax because it is a parameter during abnormal (overcurrent) operation. Note 5. The characteristice listed are theoretical values based on the IC design and are not guaranteed. .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