The PT1305 is a step-up DC/DC converter designed for driving up to 24V from a single cell Lithium Ion battery. The PT1305 switches at 1.25MHz, allowing the use of tiny, low cost and low height inductors and capacitors. A constant frequency internally compensated current mode PWM architecture results in low, predictable output noise that is easy to filter. Low ESR ceramic capacitors can be used at the output, further reducing noise to millivolt level. The high voltage switch on the PT1305 is rated at 26V, making the devices ideal for boost converters up 24V. It can generate 18V at 30mA from 3.6V supply. The PT1305 is available in SOT23-5 and SOT23-6 packages.