TC7662A Datasheet | Microchip Technology

EVALUATION KIT AVAILABLE CHARGE PUMP DC-TO-DC CONVERTER Features s s s s s s s Wide Operating Range ............................. 3V to 18V Increased Output Current .............................. 40m A Pin patible with ICL7662/SI7661/TC7660/ LTC1044 No External Diodes Required Low Output Impedance @ IL = 20m A ....... 40Ω Typ. No Low-Voltage Terminal Required CMOS Construction GENERAL DESCRIPTION The TC7662A is a pin-patible upgrade to the Industry standard TC7660 charge pump voltage converter. It converts a +3V to +18V input to a corresponding - 3V to - 18V output using only two low-cost capacitors, eliminating inductors and their associated cost, size and EMI. In addition to a wider power supply input range (3V to 18V versus 1.5V to 10V for the TC7660), the TC7662A can source output currents as high as 40m A. The on-board oscillator operates at a nominal frequency of 12k Hz. Operation below 10k Hz (for lower supply current applications) is also possible by connecting an external capacitor from OSC to ground. The TC7662A directly is remended for designs requiring greater output current and/or lower input/output voltage drop. It is available in 8-pin PDIP, and Cer DIP packages in mercial and extended temperature ranges. PIN CONFIGURATION PDIP/Cer DIP NC 1 C+ 2 8 VDD 7 OSC ORDERING INFORMATION Part No. TC7662ACPA TC7662AEPA TC7662AIJA TC7662AMJA Package 8-Pin Plastic DIP 8-Pin Plastic DIP 8-Pin Cer DIP 8-Pin Cer DIP Temperature Range 0°C to +70°C - 40°C to +85°C - 25°C to +85°C - 55°C to +125°C GND 3 C- 4 6 NC 5 VOUT NC = NO INTERNAL CONNECTION FUNCTIONAL BLOCK DIAGRAM 8 I COSC 7 LEVEL SHIFT P SW1 2 CAP + TC7662A VDD + - Q F/F C Q PARATOR WITH HYSTERESIS VREF LEVEL SHIFT N SW4 + CP EXT GND 3 + LEVEL SHIFT OUT N SW2 4 - CR EXT LEVEL SHIFT N SW3 5 VOUT © 2001 Microchip Technology...