NJU7670

VOLTAGE TRIPLER NJU7670 ■ GENERAL DESCRIPTION The NJU7670 is a voltage tripler incorporated CR oscillator, voltage converter, reference voltage circuit and voltage regulator. It can generates triple or double negative voltage of an operating voltage ranging from -2.6V to -6V. The application circuit of tripler requires three capacitors, and doubler requires only two capacitors. Furthermore, any kind of output voltage is available by the internal voltage regulator. ■ FEATURES Triple / Double Voltage Output Operating Voltage --- -2.6V to -6.0V High-efficiency Voltage Conversion Rate --- 95% (IOUT = 5mA) High Output Current --- MAX 20mA (VIN = -5V) CR Oscillator ON-Chip Output - OFF Function By External Signal --- ON / OFF of Vreg C-MOS Technology Package Outline DIP/DMP/SSOP 14 ■ PACKAGE OUTLINE ■ BLOCK DIAGRAM VDD Internal CR Osscilator Block VIN C1+ Capacitor C1- Volatage Converter Block C2- fsw=2.5KHz TYP C2+ VRV RV Poff Vreg VOUT Ver.2011-02-03 -1- NJU7670 ■ TERMINAL DESCRIPTION No. SYMBOL FUNCTION 1 C1+ Charge Pump Capacitor 1(+) Connecting Terminal 2 C1- Charge Pump Capacitor 1(-) Connecting Terminal 3 C2+ Charge Pump Capacitor 2(+) Connecting Terminal 4 C2- Charge Pump Capacitor 2(-) Connecting Terminal 5 NC Non Connection 6 NC Non Connection 7 VIN Power Supply Terminal (-) 8 VOUT Voltage Output Terminal 9 Vreg Voltage Regulator Output Terminal 10 RV Voltage Regulator Adjustment Terminal 11 Poff Vreg Output ON/O...