Title :
A Compact Switched-Capacitor Regulated Charge Pump Power Supply
Author :
Gregoire, B. Robert
Author_Institution :
AMI Semicond., Bozeman, MT
Abstract :
A CMOS switched-capacitor reference is combined with a switched-capacitor voltage doubling charge pump to produce a compact regulated 3.2-V power supply from an input that ranges from 1.8 to 3.5 V. It can supply up to 6 mA at minimum input. The switched-capacitor topology uses a single PN junction and could allow for inputs and outputs less than 1 V. The concept of constant frequency charge pump regulation is discussed, as is the theory behind stability, load regulation, and efficiency. Measured results from a 0.5-mum CMOS process are given
Keywords :
CMOS integrated circuits; circuit stability; network analysis; network topology; power supply circuits; switched capacitor networks; 0.5 micron; 1.8 to 3.5 V; CMOS process; charge pump regulation; circuit analysis; circuit stability; circuit topology; load regulation; power supplies; single PN junction; switched-capacitor circuits; voltage doubling charge pump; voltage reference; Batteries; Charge pumps; Circuit stability; Frequency control; Frequency modulation; Photonic band gap; Power supplies; Pulse width modulation; Switched capacitor circuits; Voltage; Bandgap reference; DC-DC power conversion; capacitors; charge pump; circuit analysis; circuit stability; circuit topology; overcurrent protection; power conversion; power supplies; switched-capacitor circuits; voltage reference;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2006.875303
