A bipolar anti-radiation 5a low-voltage broadband linear regulator

Abstract

The invention discloses a bipolar anti-irradiation 5-A low-voltage wideband linear voltage regulator. A voltage signal output and subjected to voltage dividing by the linear voltage regulator is compared with the 0.7-V high-precision reference voltage and amplified through a wideband two-level differential amplifier; a buffer processes the signal compared and amplified by the operational amplifier, and thus the output signal has the current driving capacity; and an output power module with a fast access is controlled to achieve 5-A low-voltage wideband voltage stabilizing output. A zero-pointcompensation and Miller compensation method is adopted to design an amplification structure, output impedance of a dominant pole is significantly reduced through a bias circuit of an emission structure, the bandwidth of the operational amplifier (with the unit gain bandwidth product being larger than 20 MHz) is increased, specifically, through a buffer structure with the emission structure and a Darlington output structure, the bandwidths of all nodes of an output circuit and a buffer circuit are pushed to high frequency, static working current of the circuits is reduced, and thus the linear voltage regulator has the working bandwidth larger than 15 MHz, and the characteristic of fast loading of the transient response.

Description

technical field [0001] The invention belongs to the technical field of bipolar analog integrated circuits, and in particular relates to a bipolar anti-irradiation 5A low-voltage broadband linear regulator. Background technique [0002] Power management chips are an important part of today's electronic systems, and power management circuits are developing toward high power density, high conversion efficiency, and high integration. Linear power supply has the advantages of low noise, low cost, simple application and high reliability, and has always been an important part of the power management field. [0003] With the increasing integration of the system chip, the process size is getting smaller and smaller, and the speed is increasing day by day, the power supply of the system chip is lower than 1.5V. At present, the output voltage of mainstream products of domestic linear regulated power supply is greater than or equal to 1.5V, and the frequency compensation is performed b...

AI Technical Summary

Problems solved by technology

However, the power supply of the system chip is less than 1.5V, and its speed increases accordingly. The bandwidth of the linear regulator using traditional technology is small, and the load transient response does not meet the application requirements of the low-voltage system chip; in order to meet the low-voltage and high-speed requirements of the system chip , shorten the development process of serialized products, use hybrid integration technology to realize reconfigurable design from core chips to circuit products, and realize product serialization and industrialization quickly and efficiently

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