UNISONIC TECHNOLOGIES CO., LTD ME7660 CMOS IC CHARGE PUMP DC-DC VOLTAGE CONVERTER DESCRIPTION ME7660 is a charge pump DC-DC voltage converter using AL-gate CMOS technology and optimization design. It converters a +1.5V to +10V input to a corresponding -1.5V to -10V output using only two external capacitors, eliminating inductors and their associated cost, size and EMI. The on-board oscillator operates at a nominal frequency of 10KHZ. Operation below 10 KHZ (for lower supply current applications) is possible by connecting an external capacitor from OSC to ground. SOP-8 FEATURES * Converts +5V Logic supply to +5V * Wide input voltage range:1.5V~10V * Efficient voltage conversion:99.9% * Good power efficiency:98% * Low power supply:50uA@5Vin * Only two external capacitors required * Compatible with RS232 negative power supply standard * No Dx diode needed for high voltage operation ORDERING INFORMATION Ordering Number Lead Free Halogen Free ME7660L-SO8-R ME7660G-SO8-R ME7660L-SO8-T ME7660G-SO8-T ME7660L-S08-R Package Packing SOP-8 SOP-8 Tape Reel Tube (1)Packing Type (1) R: Tape Reel, T: Tube (2)Package Type (2) S08: SOP-8 (3)Lead Free (3) G:Halogen Free, L: Lead Free www.unisonic.com.tw Copyright (c) 2011 Unisonic Technologies Co., Ltd 1 of 5 QW-R502-730.a ME7660 CMOS IC PIN CONFIGURATION NC 1 CAP+ 2 GND 3 CAP- 4 8 V+ 7 OSC 6 LV 5 VOUT PIN DESCRIPTION PIN NO. 1 2 3 4 5 6 7 8 SYMBOL NC CAP+ GND CAPVOUT LV OSC V+ DESCRIPTION No connection Connection external capacitor (+) pin Ground Pin Connection external capacitor (-) pin Voltage output pin Low voltage selection pin Connecting oscillation capacitor pin Power supply pin UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 5 QW-R502-730.a ME7660 CMOS IC BLOCK DIAGRAM (2) (4) CAP CAP(8) V (7) OSC (6) RC OSCILLATOR 1/2 VOLTAGE-LEVEL TRANSLATOR LV S4 S1 VOUT (5) S3 INTERNAL VOLTAGE REGULATOR S2 LOGIC NETWORK GND (3) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 5 QW-R502-730.a ME7660 CMOS IC ABSOLUTE MAXIMUM RATING PARAMETER Supply Voltage LV and OSC Inputs Voltage Power Dissipation(TA75) Current Into LV Operating Temperature Storage Temperature + V <5.5V V+>5.5V V+>3.5V SYMBOL VIN VLX VOSC PD ILV TOPR TSTG RATINGS 10.5 -0.3~(V++0.3) (V+-5.5)~(V++0.3) 470 20 -40 ~ +85 -65 ~ +150 UNIT V V V mW uA ELECTRICAL CHARACTERISTICS (V+=5V,COSC=0) PARAMETER Supply Current Supply Voltage High Low SYMBOL I+ + VH V+L Output Resistance ROUT Oscillator Frequency Power Efficiency Voltage Conversion Efficiency FOSC PEFF VEFF TEST CONDITIONS RL= LV Open LV to GND IOUT=20mA, TA=25 IOUT=3mA, V+=2V,TA=25 Pin 7 open RL=5k RL= UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN TYP 60 3 1.5 90 98 110 220 10 98 99.9 MAX 120 10 4 UNIT uA V V kHz % % 4 of 5 QW-R502-730.a ME7660 TESTING CIRCUIT TYPICAL APPLICATION CIRCUIT CMOS IC Above figure is the basic application circuit to provide a negative supply from -1.5V ~ -10V while a positive supply from +1.5V ~ +10V is available. When V+=+5V, the output resistance is about 100; The output voltage is -4V while the load current is 10mA. UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 5 QW-R502-730.a