New Industry Products

ON Semiconductor Announces New MC1121, MAX828 and MAX829 Charge-Pump Voltage Converters

April 02, 2000 by Jeff Shepard

ON Semiconductor LLC (Phoenix, AZ) announced the availability of three new charge-pump voltage converters to augment its portfolio of power-management ICs. The MC1121 is a charge-pump voltage converter with 100mA of output current capability and a power-saving shutdown mode. The MAX828 and the MAX829 are CMOS charge-pump voltage converters that invert and/or double an input voltage that ranges from +1.5V to +5.5V.

The MC1121 charge pump, equipped with a resident oscillator circuit, gives the user complete flexibility in selecting the proper operational mode for the circuit. The oscillator operates at both low and high frequencies. The MC1121 acts as an inverter by converting a 2.4V to 5.5V input to a corresponding negative output voltage. It also acts as a voltage doubler by doubling the applied input voltage.

The MAX828 and MAX829 CMOS charge-pump voltage converters are designed for portable products such cellular phones, pagers, PDAs, dataloggers and other battery-powered products. These devices perform voltage conversion with a conversion efficiency typically greater than 95 percent, with a quiescent current value as low as 50uA for the MAX828, and up to 25mA output current for the MAX829. The switching frequencies for the MAX828 and the MAX829 are at 12kHz and 35kHz, respectively.

The MC1121 is housed in a Micro8 package, and the MAX828 and the MAX829 are housed in ultra-small SOT-23-5 lead packages. Pricing for the MC1121 is $1.18 in quantities of 10,000, and pricing for the MAX828 and MAX829 is $0.65 in quantities of 12,000. These devices are currently available.