An Integrated Low Drop Out Regulator with Independent Self Biasing Start Up Circuit

摘要

The start-up behaviour of LDOs is critical for many ICs to function. Especially in multi supply voltage ICs, many constraints have to be fulfilled. So, additional circuitry is necessary for a reliable start-up. This paper proposes an LDO with additional circuitry which ensures a safe start-up without the need for other external voltages or signals. The proposed LDO allows the IC to rely on a stable supply voltage which can be used to control and coordinate the start-up of all other on chip circuitry.