max889MAX889 Features o 200mA Output Current o Up to 2MHz Switching Frequency o Small Capacitors (1µF) o +2.7V to +5.5V Input Voltage Range o Adjustable Regulated Negative3. MAX889, MAX168x and other have a VERY LIMITED CURRENT, because of their limited power dissipation to 471mW at 70C. This allows for around 40mA with MAX1680.