Low-dropout regulator with dynamic pole tracking circuit for improved stability

US9891644B1 · kind B1 · utility

Assignee

• University of Electronic Science and Technology of China · CN

Inventors

• Xin Ming · Chengdu, CN
• Tiansheng Li · Beijing, CN
• Jun Xu · Gaithersburg, US
• Zhuo Wang · Suzhou, CN
• Bo Zhang · Shanghai, CN

Key dates

• Filing date: Dec 22, 2016
• Grant date: Feb 13, 2018
• Expiry date: Dec 22, 2036

Classification

• Technology area (CPC G): Physics
• CPC primary: G05F1/565
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A low-dropout regulator, including: a dynamic pole tracking circuit having an active load, a voltage-to-current converter, a current amplifier, a bias circuit, a regulating transistor, a first feedback resistor, a second feedback resistor, and a first capacitor. The dynamic pole tracking circuit includes: a first PMOS, a second PMOS, a first resistor, and a second resistor. The voltage-to-current converter includes: a first NMOS, a second NMOS, a third NMOS, a fourth NMOS, a fifth NMOS, a sixth NMOS, a seventh NMOS, an eighth NMOS, a third PMOS, a fourth PMOS, a seventh PMOS, an eighth PMOS. The current amplifier includes: a fifth PMOS, a sixth PMOS, a ninth NMOS, a tenth NMOS, and a third resistor. The bias circuit includes: a ninth PMOS, a tenth PMOS, an eleventh PMOS, an eleventh NMOS, a twelfth NMOS, a thirteenth NMOS, and a fourth resistor.