Design of high-reliability LDO with current limiting characteristics with built-in new high tolerance ESD protection circuit

Abstract

This paper proposes the Low-Dropout regulator including the "load current sensing circuit". The load current sensing circuit senses the change of the load current and then reduces the ripple of the output voltage. The load transient response characteristic of the Low-Dropout regulator is improved by this method. And this paper uses a body driven technique to enhance the current driving capability for pass transistor. The proposed circuit is simulated by HSPICE with a 0.18 μm BCD process parameter. In addition, this paper enhances the reliability of IC by equipping the P-substrate triggered SCR type ESD protection device.

Design of Capacitor-Less High Reliability LDO Regulator with LVTSCR Based ESD Protection Circuit Using Current Driving Buffer Structure

“…Therefore, the power in a battery with a limited capacity must be continuously managed by a power management integrated circuit (PMIC). The Low Drop-Out (LDO) regulators are an indispensable component for IC management [1][2][3][4][5][6][7]. In addition, the LDO regulator with low noise and stable voltage drive is an important factor to consider in the circuit design.…”