Author_Institution :
Sch. of Electron. & Inf., Tongji Univ., Shanghai, China
Abstract :
This paper presents a fast transient load current regulator, and the simulation result and layout is shown as well. This regulator provides the reference voltage following with the power supply for high speed logic circuit, which introduces a parallel path structure of high speed low loop gain and low speed high loop gain, and have fast load transient. The circuit is based on 0.25um Si-Ge technology of 3.3V/1.5V dual gate; the power supply is 4.5-5.5V, load capacitance is 400pF, load current is 0~200mA, working ambient temperature is -40-135°C, the maximum transient load current is 280mA, line regulation is 20mV/V, load regulation is 580uV/200mA, and load transient is 60mV/280mA. The DC loop gain, unit gain bandwidth, and phase margin of parallel path are 55.6dB, 1.2GHz and 64.7° in turn. The regulator has three working mode: sleep, standby and active, which power supply is 35.6uA, 10.4mA and 10.4mA in turn. The area of the layout is 234.8* 100um2.
Keywords :
Ge-Si alloys; high-speed integrated circuits; logic circuits; voltage regulators; DC loop gain; fast transient load current regulator; high speed logic circuit; high speed low loop gain; line regulation; load capacitance; low speed high loop gain; parallel path structure; power supply; reference voltage; size 0.25 mum; unit gain bandwidth; voltage 4.5 V to 5.5 V; Digital circuits; Fluctuations; Frequency response; Layout; Power supplies; Regulators; Transient analysis; Parallel path; Regulator; Transient Load;
