Design of a Flexible Bandgap Based High Voltage UVLO with Pre-Regulator

This paper presents an integrated 24 V undervoltage-lockout (UVLO) design based on a ±0.78 % accuracy 77 dB supply rejection bandgap reference and utilizing a dedicated pre-regulator. The design features a high number of inputs with minimum additional space. The switching thresholds have a nominal accuracy over temperature of 1.1 %. The power consumption at 10 V is 119μW and the circuit occupies a die area of 0.15 mm ² . This circuit is implemented in a 0.18 μm BCD technology.