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

A linear voltage regulator and anti-irradiation technology, which is applied in the direction of instruments, control/regulation systems, and adjustment of electrical variables, can solve the problem of not meeting the application requirements of low-voltage system chips, shortening the development process of serialized products, and reducing the bandwidth of linear voltage regulators. Small problems, to achieve the effect of increasing bandwidth, increasing current gain, and improving transient response speed

CN109189137BActive Publication Date: 2020-08-04XIAN MICROELECTRONICS TECH INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2020-08-04

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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.
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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...

Examples

Embodiment 1

[0073] Based on the 3μ18V anti-irradiation bipolar process design and implementation, the input power supply voltage of the linear regulator is 3.3V~7V, the output current range is 0~5A, the output voltage is 0.8V~1.5V, and the system loop gain bandwidth product is greater than or equal to 12MHz. Under 0.1rad(Si) / s, the anti-total dose capability is greater than or equal to 100krad(Si).

[0074] According to the invention scheme, the typical application diagram of the circuit is as follows Figure 4 shown, where V IN1 = 0.1μF, V IN2 = 10μF, C OUT = 10μF, R L1 for the load of the linear regulator. In the case of ensuring that the electrical connection characteristics of the linear regulator are correct, the hybrid integration technology is used to configure figure 1 The different proportional relations of R1 and R2 in the medium-thick film circuit can realize the output voltage of 0.8V ~ 1.5V, the output current can reach 5A, and it has the characteristics of fast load tra...