CAT660 Datasheet | Catalyst Semiconductor

Preliminary Information 100m A CMOS Charge Pump Inverter/Doubler Features I Replaces MAX660 and LTC®660 I Converts V+ to V- or V+ to 2V+ I Low output resistance, 4Ω typical I High power efficiency I Selectable charge pump frequency I Low quiescent current GEN FR ALO A D F R E ETM I Pin-patible, high-current alternative to 7660/1044 I Industrial temperature range I Available in 8-pin SOIC, DIP and 0.8mm thin 8- - 10k Hz or 80k Hz - Optimize capacitor size pad TDFN packages - Lead-free, halogen-free package option APPLICATIONS I Negative voltage generator I Voltage doubler I Voltage splitter I Low EMI power source I Ga As FET biasing I Lithium battery power supply I Instrumentation I LCD contrast bias I Cellular phones, pagers DESCRIPTION The CAT660 is a charge-pump voltage converter. It will invert a 1.5V to 5.5V input to a -1.5V to -5.5V output. Only two external capacitors are needed. With a guaranteed 100m A output current capability, the CAT660 can replace a switching regulator and its inductor. Lower EMI is achieved due to the absence of an inductor. In addition, the CAT660 can double a voltage supplied from a battery or power supply. Inputs from 2.5V to 5.5V will yield a doubled, 5V to 11V output voltage. A Frequency Control pin (BOOST/FC) is provided to select either a high (80k Hz) or low (10k Hz) internal oscillator frequency, thus allowing quiescent current vs. capacitor size trade-offs to be made. The 80k Hz frequency is selected when the FC pin is connected to V+. The operating frequency can also be adjusted with an external capacitor at the OSC pin or by driving OSC with an external clock. Both 8-pin DIP and SOIC packages are available in the industrial temperature range. The TDFN package has a 4x4mm footprint and Features a 0.8mm maximum height. pared to the 8-pin SOIC the TDFN package footprint is nearly 50% less. For die availability, contact Catalyst Semiconductor marketing. The CAT660 replaces the MAX660 and the LTC660....