A High Performance And High Stability Of DC-DC BUCK-based Analysis And Design Of The Regulator

Switching power supply because of its high conversion efficiency and energy saving, represents the development trend of power supply. At present, some important sectors of the stability of the chip are higher, and most of the imported chips. As the imported chip is expensive, so the independent research and development of high stability with high performance DC-DC BUCK-based power management chip is very necessary. This paper describes the establishment of PWM mode DC/DC regulator system, closed-loop response transfer function, the various subsystems of the overall system performance simulation to study the impact of how the design of switching power supply transient response and stability in the trade-off; by Cadence platform to achieve in the simulation. The on-chip DC/DC PWM switching regulator with reduced power semiconductor CZ6H Shanghai New design and implementation process to achieve a high stability of a high-performance DC-DC BUCK-type regulator. Describes the historical development of power management chips, domestic and foreign development status and market prospects of the product; BUCK DC-DC circuit-based classification, and three modulation circuit BUCK PWM (Pulse Width Modulation), PFM (pulse frequency Modulation), PSM (Cross-cycle pulse modulation mode), the paper elaborated on PWM, PFM, PSM modulation of three working process and performance indicators, analyzes their advantages and disadvantages; principle of the overall composition of the chip design and the sub-module Principle, set out the simulation map, described the simulation method and simulation results are given waveform; then each module has been designed composition of the whole circuit, the whole circuit simulation, the performance indicators listed. Analysis of the indicators and simulation results show that the performance indicators are to meet the design requirements. Finally, draw the map of each module and layout were verified.