Demonstration circuit 433 features a high frequency 1.25MHz 12Vout DC/DC monolithic boost converter fea-turing the LT1961. This current-mode control monolithic (switch included) converter has a wide operating supply voltage, a minimum peak switch current rating of 1.5A, and a low resistance 0.2Ω power switch. The switch cur-rent limit is constant at all duty cycles. The tiny MSOP 8-Pin exposed leadframe package is optimal for high power in a tiny space with excellent heat dissipation ca-pabilities. The small size and wide input voltage of the LT1961 are demonstrated by the 2.8V–12V input to 12V output boost converter. The maximum output current varies with respect to the input voltage. The board is optimized for 5V input to 12V output at up to 450mA load current. Compensation components are designed for stable op-eration over the entire input voltage range 2.8V–12V in-put for this 12V output application. Adjustable feedback resistors allow simple customization of the output volt-age. For this particular output, stability and transient response can be more optimally chosen for specific in-put voltages such as 5VIN ±10% or 3.3VIN ±10%. The high 1.25MHz switching frequency allows for the use of tiny ceramic input and output capacitors as well as a very small inductor, making possible tiny and low cost boost converter solutions. High switching frequency re-sults in lower output voltage ripple than lower frequency converters