MAX828

MAX828, MAX829 Switched Capacitor Voltage Converter The MAX828 and MAX829 are CMOS charge pump voltage inverters that are designed for operation over an input voltage range of 1.15 V to 5.5 V with an output current capability in excess of 50 mA. The operating current consumption is only 68 mA for the MAX828 and 118 mA for the MAX829. The devices contain an internal oscillator that operates at 12 kHz for the MAX828 and 35 kHz for the MAX829. The oscillator drives four low resistance MOSFET switches, yielding a low output resistance of 26 W and a voltage conversion efficiency of 99.9%. These devices require only two external capacitors, 10 mF for the MAX828 and 3.3 mF for the MAX829, for a complete inverter making it an ideal solution for numerous battery powered and board level applications. The MAX828 and MAX829 are available in the TSOP−5 package. Features Operating Voltage Range of 1.15 V to 5.5 V Output Current Capability in Excess of 50 mA Low Current Consumption of 68 mA (MAX828) or 118 mA (MAX829) Operation at 12 kHz (MAX828) or 35 kHz (MAX829) Low Output Resistance of 26 W Space Saving TSOP−5 Package Pb−Free Packages are Available Typical Applications LCD Panel Bias Cellular Telephones Pagers Personal Digital Assistants Electronic Games Digital Cameras Camcorders Hand−Held Instruments 1 5 Vin 2 3 4 −Vout This device contains 77 active transistors. Figure 1. Typical Application © Semiconductor Components Industries, LLC, 2005 1 ...