NJU7670 VOLTAGE TRIPLER GENERAL DESCRIPTION PACKAGE OUTLINE

Transcription

1 VOLTAGE TRIPLER GENERAL DESCRIPTION PACKAGE OUTLINE The 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.v to V. 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 ---.V to.v High-efficiency Voltage Conversion Rate --- % (IOUT = ma) High Output Current --- MAX ma (VIN = -V) CR Oscillator ON-Chip Output - OFF Function By External Signal --- ON / OFF of Vreg C-MOS Technology Package Outline DIP/DMP/SSOP BLOCK DIAGRAM Internal CR Osscilator Block V C Capacitor Volatage Converter Block fsw=.khz TYP Ver.- - -

2 TERMINAL DESCRIPTION No. SYMBOL FUTION C Charge Pump Capacitor () Connecting Terminal Charge Pump Capacitor (-) Connecting Terminal Charge Pump Capacitor () Connecting Terminal Charge Pump Capacitor (-) Connecting Terminal Non Connection Non Connection Power Supply Terminal (-) Voltage Output Terminal Voltage Regulator Output Terminal Voltage Regulator Adjustment Terminal Output ON/OFF Control Terminal Non Connection Non Connection Power Supply Terminal () FUTIONAL DESCRIPTION () Voltage Converter The voltage converter generates double or triple voltage against VIN. = V =-V = =-V () Voltage Reference Circuit The voltage reference circuit is generating the reference voltage for a voltage regulator. () Voltage Regulator The voltage regurator output stabilized voltage which regulated by using the external resistor against double or triple voltage of the input voltage. (-) 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 Voltage Regulator Control signal R =kω~mω Level "H" (Connect to VDD) "L" (Connect to VIN) Vreg Output ON OFF - - Ver.-

3 () 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 R. As the 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 V.μF C C Sealed Line R R R k~mω C =-V =-V R =V= R V C The IC may have a possibility not to operate properly with unstable supply voltage due to large transient current when the capacitor is charged or discharged. The decoupling capacitor ( ) connect as close as possible to the IC. Ver.- - -

4 ABSOLUTE MAXIMUM RATINGS (Ta= C) PARAMETER SYMBOL RATINGS UNIT Supply Voltage - V V I -. to. Note) Input Voltage V V I -. to. Note) Output Voltage. V DIP Power Dissipation Note): Apply to terminal Note): Apply to terminal P D DMP SSOP Operating Temperature Range Topr to C Storage Temperature Tstg to C mw ELECTRICAL CHARACTERISTICS ( =V, =-V, =.µf, Ta= C) Note) PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAX. UNIT Supply Voltage.. V Output Voltage -. RL =, R = MΩ, = -V -.. V Regulator Operating Voltage V (OUT -.. V Current Consumption I DD = H note) RL =, R = MΩ, =.V µa Current Consumption I DD = L note) RL =, R = MΩ µa Output Impedance R OUT I OUT = ma,c = = C = µa Ω Power Conversion Rate P eff I OUT = ma,c = = C = µa % Line Regulation Δ Δ -V < < V = V, RL =. %/V Load Regulation Δ Δ I reg = -V, = V < I reg < ma. Ω R Output Saturation Resistance R SAT = Δ ( - ) /Δ I reg SAT < I reg < ma, =. Ω Reference Voltage V V Input Current I IN Terminal. µa Input Current I IN Terminal. µa Switching Frequency f sw. khz Note): To achieve the best operation, select the input capacitor ( ) with enough margin according to the stability of supply voltage. Note): Excluding input current on R - - Ver.-

5 APPLICATION CIRCUITS () (-) Tripler Operation C C V.μF =-V =-V C The IC may have a possibility not to operate properly with unstable supply voltage due to large transient current when the capacitor is charged or discharged. The decoupling capacitor ( ) connect as close as possible to the IC. () Doubler Operation C V.μF =-V =-V C The IC may have a possibility not to operate properly with unstable supply voltage due to large transient current when the capacitor is charged or discharged. The decoupling capacitor ( ) connect as close as possible to the IC. Ver.- - -

6 APPLICATION CIRCUITS () () Parallel Connection V.μF C.μF C C C Sealed Line R R R C =-V =-V =-V C * The output impedance ROUT can be reduced by parallel connection. * C is a stabilizing capacitor output for stabilized voltage. * In the parallel connection, one stabilizing capacitor using is better way. * The IC may have a possibility not to operate properly with unstable supply voltage due to large transient current when the capacitor is charged or discharged. The decoupling capacitor ( ) connect as close as possible to the IC. Ver.- - -

7 TYPICAL CHARACTERISTICS (CIRCUITS CONDITION : Tripler Operation Voltage Regulator Operation) Output Voltage vs.input Voltage Regulator Output Voltage vs.input Voltage - - Output Voltage : Vo (V) C Regulator Output Voltage : Vreg (V) C Supply Voltage : (V) Supply Voltage : (V) Output Voltage vs.regulator Output Current Output Voltage vs.regulator Output Current Output Voltage : Vo (V) Output Voltage : Vo (V) - - C C =-V Regulator Output Current : Ireg (ma) Regulator Output Current : Ireg (ma). Charge Pump Capacitor Frequency vs.input Voltage Charge Pump Capacitor Frequency : f(khz) C - - Supply Voltage : (V) [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. Ver.- - -