Abstract
This study is dedicated to improve the performance of a single inductor multi-output (SIMO) DC-DC converter by revising the associated chip layout for avoiding possible p-n breakdowns. Newly-revised circuit is assured capable of boosting input voltage at 2.8V to +12V and -12V. There are four subcircuits in the converter which contains a gate driver circuit, a level shifter, a ripple-based voltage sensor, and the part of sensed output. There is also a zero current detection (ZCD) circuit. Pre- and post-simulation are successfully conducted following charging order of +12V, -12V, +6V and -6V. The constant on-time method approach is found favorable in regards of crossing regulation and high transfer efficiency in unbalanced load cases.
