NJU7670V-TE1

NJU7670 PRELIMINARY 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. ■ PACKAGE OUTLINE ■ 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 ■ PIN CONFIGURATION NJU7670M NJU7670D NJU7670V ■ BLOCK DIAGRAM Ver.2003-07-18 -1- NJU7670 ■ TERMINAL DESCRIPTION No. SYMBOL 1 2 3 4 5 6 7 8 9 10 11 C1+ C1C2+ C2NC NC VIN VOUT Vreg RV 12 13 14 Poff NC NC VDD FUNCTION Charge Pump Capacitor 1(+) Connecting Terminal Charge Pump Capacitor 1(-) Connecting Terminal Charge Pump Capacitor 2(+) Connecting Terminal Charge Pump Capacitor 2(-) Connecting Terminal Non Connection Non Connection Power Supply Terminal (-) Voltage Output Terminal Voltage Regulator Output Terminal Voltage Regulator Adjustment Terminal Vreg Output ON/OFF Control Terminal Non Connection Non Connection Power Supply Terminal (+) ■ FUNCTIONAL DESCRIPTION (1) Voltage Converter The voltage converter generates double or triple voltage against VIN. (2) Voltage Reference Circuit The voltage reference circuit is generating the reference voltage for a voltage regulator. (3) Voltage Regulator The voltage regurator output stabilized voltage which regulated by using the external resistor against double or triple voltage of the input voltage. (3-1) Output-OFF Function As this circuit incorporated output-off function, the voltage regulator output (ON/OFF) is performed by the signal come from system. ● ON/OFF Control for Vreg Terminal -2- Poff Level Vreg Output "H" (Connect to VDD) ON "L" (Connect to VIN) OFF Ver.2003-07-18 NJU7670 (3-2) Example of the Voltage Regulation The voltage regulator has a output terminal which can be adjusted the output voltage to any kind of voltage by resistance RRV. As the RV terminal input impedance is high. Therefore special care against noise is required. (Use a sealed line or others noise-proof method) Tripler Operation + Voltage Regulator Operation Ver.2003-07-18 -3- NJU7670 ■ ABSOLUTE MAXIMUM RATINGS PARAMETER Supply Voltage Input Voltage Output Voltage (Ta = 25ºC) SYMBOL RATINGS UNIT VIN VDD − VOUT ≤ 20 V VI1 VIN -0.5 to + 0.5 Note 1) VI2 VOUT -0.5 to + 0.5 Note 2) V VOUT -20.0 V Power Dissipation PD 700 (DIP) 300 (DMP) 250 (SSOP) mW Operating Temperature Range Topr -20 to +75 ºC Storage Temperature Range Tstg -40 to +125 ºC Note1) Apply to POFF terminal Note2) Apply to RV terminal ■ ELECTRICAL CHARACTERISTIC (VDD = 0V, VIN = -5V, Ta = 25°C) PARAMETER Supply Voltage Output Voltage SYMBOL MIN. TYP. MAX. UNIT VIN -6.0 - -2.6 V VOUT -18.0 - - V Vreg Regulator Operating Voltage VOUT Current Consumption 1 IDD1 Current Consumption 2 Output Impedance Power Conversion Rate Line Regulation Load Conversion IDD2 CONDITIONS RL = ∞, RRV = 1MΩ, VOUT = -18V -18.0 - -2.6 V -18.0 - -8.0 V Poff = "H" Note 3) RL = ∞, RRV = 1MΩ, Vreg = -2.6V - 75 120 µA Poff = "L" RL = ∞, RRV = 1MΩ - 60 100 µA Note 3) ROUT IOUT = 20mA, C1 = C2 = C3 = 10µF - 150 200 Ω Peff IOUT = 5mA, C1 = C2 = C3 = 10µF 90 95 - % - 0.2 - %/v VOUT = -15V, Vreg = -8V 0 < Ireg < 20mA - 5.0 - Ω RSAT = ∆ (Vreg -VOUT) / ∆Ireg 0 < Ireg < 20mA, RV = VDD - 8.0 - Ω ∆Vreg -18V < VOUT < -8V ∆VOUT ⋅ Vreg Verg =-8V, RL = ∞ ∆Vreg ∆Ireg Output Saturation Resistance RSAT Reference Voltage VRV -2.3 -1.5 -1.0 V Input Current 1 IIN1 RV Terminal - - 1.0 µA Input Current 2 IIN2 Poff Terminal - - 2.0 µA Switching Frequency fSW - 2.5 - kHz Note 3) Excluding input current on RRV. -4- Ver.2003-07-18 NJU7670 ■ APPLICATION CIRCUITS (1) (1-1) Tripler Operation (1-2) Doubler Operation Ver.2003-07-18 -5- NJU7670 ■ APPLICATION CIRCUIT (2) (2) Parallel Connection * The output impedance ROUT can be reduced by parallel connection. * C3 is a stabilizing capacitor output for stabilized voltage. * In the parallel connection, one stabilizing capacitor using is better way. [CAUTION] The specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights. -6- Ver.2003-07-18