IRC NIJIUVT7TG6G62 VOLTAGE CONVERTER Mi GENERAL DESCRIPTION The NJU7662 is a voltage converter incorporated CR- oscillator, voltage-level-shifter and power-MOS, which generates a polarity-converted negative voltage or two- fold voltage of an operating voltage ranging from +4.5 to +20.0V. The application circuit of negative voltage converter requires only two capacitors, and positive twofold vol- tage converter requires two capacitors, two resisters and one diode as external components. The oscillation frequency of the internal oscillator is 10kHz and the negative voltage converter (on no-load condition) achieves extremely high-efficiency voltage conversion rate of 99.9%. M@ FEATURES Polarity-converted Negative Voltage Output Twofold Positive Voltage Output Operating Voltage --- +4.5 to +20.0 V High-efficiency Voltage Conversion Rate -- 99.9% (No-load, Negative Voltage Converter) High-efficiency Power Conversion Rate -- 964 (Negative Voltage Converter) Cascade Connection Available 2N-1 times voltage outputs for negative voltage QN times voltage outputs for positive voltage Few External Components --- 2 Capacitors (Negative Voltage Converter) -- 2 Capacitors, 2 Resistors and 1 Diode (Positive Voltage Converter) @ Package Outline DIP/DMP 8 @ C-MOS Technology M BLOCK DIAGRAM M@ PACKAGE OUTLINE NJU76620 WJU7662M mM PIN CONFIGURATION TEST 9 8563 (| osc [] Ve Vout es Ww NY nn a ow mira rn | | Voltage Level Converter CR Oscillator [* 72 ry | L | Q3 oD Vout OSC Vk GND New Japan Radio Co. Lid. 35 NIJIUVT6E6 62 MM APPLICATION CIRCUITS (1-1) NEGATIVE VOLTAGE OUTPUT In case of 4.5 to 6.0V operation Vis= 43 ~6V Vout = Vis + (2) TWOFOLD VOLTAGE OUTPUT Vin=4.5~20V RL 1002 Vout = 2: Vin pt + a 10eF In case of Vin S6V, This resistor is required In the twofold voltage application, Ri, Rs and D1 are required for start-up. In case of 6.0 to 20.09 operation (1-2) NEGATIVE VOLTAGE OUTPUT Vin = 6~20V Vout = Vx (#1) No. 6 Terminal must connect to GND or Open according to the cperating voltage as follows; +<6V --- Connect to GND +26V --~ OPEN New Japan Radio Co.,Ltd. IRC NJUV7T 662 mM ABSOLUTE MAXIMUM RATINGS (Ta=25C) PARAMETER SYMBOL RATINGS UNIT Supply Voltage Vv" 22 V Input Voltage Vin -0.38-V40.3 @V*<7 V V-7T~V't0.3 @V*>7 Output Short CONTINUITY @V*<5.5 V Power Dissipation Pp 500 ( DIP ) mW 300_( DMP_) Operating Temperature Range | Topr -20 ~ + 70 C Storage Temperature Range Tstg ~65 ~ +150 C M ELECTRICAL CHARACTERISTICS ( Ta=25C, V*=15V, Cosc=0 ) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNIT Operating Current Vl B.=00, Ve=OPEN 250 600 uA I'2 Vt=5V, Ri=0o, Ve=GND 20 150 Operating Voltage VHI -20C S$TaS70C, | Ve=OPEN 3.0 10.0 V V*LO Ri=10kQ Ve=GND 4.5 6 Rol Tout=20mA, Ta=25C 60 100 Output Resistance Ve=OPEN, -20CS$TaS70C 70 120 Q ( #Note 1) Ro2 Vr=5V, Tout=3mA, Ta=25C 125 200 Ve=GND, -20CSTaS70C 150 250 Oscillation Frequency Fo 10 kHz Power Conversion Rate Per R.=2kQ 93 96 * Voltage Conversion Rate Ver RL =00 97 99.9 4 Oscillation Terminal loscl | V*=15V, (Vosc=8~15V) 4.0 uA Input Current losc2 | V=5V, (Vosc=0~5) 0.5 *Note 1 The twofold positive converter needs 100 ohms series resistance on the power source terminal, therefore the output impedance increases to 200 ohms. New Japan Radio Co, Ltd. 37