TC7662 Charge Pump DC-to-DC Converter

TC7662A is a pin-compatible 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 40mA.

The on-board oscillator operates at a nominal frequency of 12kHz. Operation below 12kHz (for lower supply current applications) is also possible by connecting an external capacitor from OSC to ground. The TC7662A directly is recommended for designs requiring greater output current and/or lower input/ output voltage drop. It is available in 8-pin PDIP and CERDIP packages in commercial and extended temperature ranges.

Features of TC7662 Charge Pump DC-to-DC Converter

• Wide Operating Range 3V to 18V

• Increased Output Current (40mA)

• Pin Compatible with ICL7662/SI7661/TC7660/LTC1044

• No External Diodes Required

• Low Output Impedance @ IL = 20mA 40 Ohm Typ.

• No Low-Voltage Terminal Required

• CMOS Construction

• Available in 8-Pin PDIP and 8-Pin CERDIP Packages

Applications of TC7662 Charge Pump DC-to-DC Converter

• Laptop Computers

• Disk Drives

• Process Instrumentation

• uP-based Controllers