NJU7670
VOLTAGE TRIPLER
■ 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
Volatage
C1-
Converter
Block
C2- fsw=2.5KHz
TYP
C2+
VRV
RV
Poff
Vreg
VOUT
Ver.2011-02-03
-1-