In summary, the Linear Technology LT3999 is a monolithic high-frequency push-pull transformer driver capable of providing isolated power in a small solution size. Targeted for isolated power levels up to 15W, it operates over an input voltage range of 2.7V to 36V, and features dual 1A onboard power switches. It has a programmable duty cycle, runs open loop, and does not require output voltage feedback. The output voltage is set by turns ratio of the transformer. The switching frequency is adjustable from 50kHz to 1MHz and can be synchronized to an external clock. The input operating voltage range is set with the precise undervoltage and overvoltage lockouts. Additionally, an onboard cross-conduction prevention circuit increases reliability.