TC7662AMJA Microchip

TC7662A Charge Pump DC-to-DC Converter Features Package Type Wide Operating Range 8-Pin PDIP 8-Pin CERDIP - 3V to 18V Increased Output Current (40mA) 1 8 NC V DD Pin Compatible with ICL7662/SI7661/TC7660/ + LTC1044 C 2 7 OSC TC7662A No External Diodes Required 3 6 GND NC Low Output Impedance I = 20mA L V C 4 5 OUT -40 Typ. No Low-Voltage Terminal Required CMOS Construction General Description Available in 8-Pin PDIP and 8-Pin CERDIP The TC7662A is a pin-compatible upgrade to the Packages industry standard TC7660 charge pump voltage converter. It converts a +3V to +18V input to a Applications corresponding -3V to -18V output using only two low- Laptop Computers cost capacitors, eliminating inductors and their Disk Drives associated cost, size and EMI. In addition to a wider power supply input range (3V to 18V versus 1.5V to Process Instrumentation 10V for the TC7660), the TC7662A can source output P-based Controllers currents as high as 40mA. The on-board oscillator operates at a nominal frequency of 12kHz. Operation Device Selection Table below 12kHz (for lower supply current applications) is also possible by connecting an external capacitor from Operating Part OSC to ground. Package Temp. Number Range The TC7662A directly is recommended for designs requiring greater output current and/or lower input/ TC7662ACPA 8-Pin PDIP 0C to +70C output voltage drop. It is available in 8-pin PDIP and TC7662AEPA 8-Pin PDIP -40C to +85C CERDIP packages in commercial and extended TC7662AIJA 8-Pin CERDIP -25C to +85C temperature ranges. TC7662AMJA 8-Pin CERDIP -55C to +125C 2001-2012 Microchip Technology Inc. DS21468B-page 1TC7662A Functional Block Diagram 8 V DD I TC7662A 7 OSC Level P SW1 Shift Q 2 + + F/F CAP C Q Level + N SW4 Shift C P Comparator EXT with Hysteresis GND 3 V REF + OUT C R Level N SW2 EXT Shift 4 CAP R L Level N SW3 Shift 5 V OUT DS21468B-page 2 2001-2012 Microchip Technology Inc.