NTE1867 & NTE1868 Integrated Circuit Hybrid Switching Voltage Regulator Features: D Few External Components Needed D Conversion Efficiency: 85% D Accurate Voltage Setting: ±2% D Low Switching Noise D Output Voltage Adjustable Applications: D Power Supply Circuits for Electrionic Typewriter, Printer, and Copy Machines D Power Supply for VCR, Personal Wireless Station, and Battery Charger Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) DC Input Voltage, VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45V DC Input Current, IO Continuous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2A Pulsed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3A Power Dissipation, PD TC = +25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75W TC = +100°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15W Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +100°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +100°C Electrical Characteristics: (TA = +25°C unles otherwise specified) Parameter DC Input Voltage Range NTE1867 Symbol VIN Test Conditions IO = 1A NTE1868 Output Voltage Setting NTE1867 VO VIN = 24V, IO = 1A NTE1868 Min Typ Max Unit 18 – – V 19 – – V 11.8 12.0 12.2 V 12.8 13.0 13.2 V Line Regulation ∆VLINE VIN = 20V to 28V, IO = 1A – – 60 mV Load Regulation ∆VLOAD VIN = 24V, IO = 0.5A to 1.5A – – 100 mV η VIN = 24V, IO = 1A – 85 – % Ripple Rejection RREJ f = 100Hz to 200Hz – 45 – dB Oscillating Frequency fOSC VIN = 24V, IO = 1A – 25 – kHz Efficiency Pin Connection Diagram (Front View) 5 Input 4 Voltage Sensing 3 GND 2 Voltage Adjustment 1 Output/Case .236 (6.0) Max 1.410 (36.0) .960 (24.4) .834 (21.2) 1 2 3 4 5 .177 (4.5) .708 (18.0) .214 (5.45) .039 (1.0) .023 (0.6)