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Quick-response generating circuit for voltage regulator, method and application thereof

A voltage regulator, a fast-response technology, applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc.

Active Publication Date: 2009-10-14
RICHTEK TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, there are above-mentioned inconveniences and problems in the known quick-response generation circuit for voltage regulators.

Method used

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  • Quick-response generating circuit for voltage regulator, method and application thereof
  • Quick-response generating circuit for voltage regulator, method and application thereof
  • Quick-response generating circuit for voltage regulator, method and application thereof

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Embodiment Construction

[0163] The present invention will be further described below in conjunction with embodiment and accompanying drawing.

[0164] The system according to the invention will contain two control loops, the first loop is the original PWM loop of the voltage regulator, which has an error amplifier and PWM comparator for generating the PWM signal, and the second loop is a fast response loop, with to generate a fast response signal. The fast response signals can be modulated according to certain signals, so the fast response signals of each phase in a multi-phase voltage regulator are separated from each other.

[0165] Figure 4 It is a block diagram of an interleaved PWM regulator system with a Quick Response Width Modulation (Quick Response WidthModulation; QRWM) control architecture of the present invention, which includes N phases connected in parallel between the power input terminal VIN and the power output terminal VOUT, each Each phase contains a power stage 10 connected to ...

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PUM

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Abstract

The invention relates to a quick-response generating circuit for a voltage regulator. The voltage regulator is used for generating regulated output voltage on a power output end and comprises a first quick-response comparator, a second quick-response comparator, a quick-response signal generating circuit and a switch, wherein the switch is connected between a power input end and the power output end and switched by a pulse-width modulation signal. The quick-response generating circuit for the voltage regulator is characterized in that the first quick-response comparator compares first reference voltage and a feedback signal derived from the output voltage to generate a set signal; the second quick-response comparator compares the feedback signal and second reference voltage to generate a reset signal; the quick-response signal generating circuit generates a quick-response signal according to the set signal and the reset signal so as to determine a quick-response pulse used for being inserted into the pulse-width modulation signal; and the switch is turned on in a quick-response pulse period to connect the power input end to the power output end.

Description

technical field [0001] The present invention relates to a voltage regulator, in particular to a fast response generation circuit, method and application thereof for the voltage regulator. Background technique [0002] In modern voltage regulator systems applied to microprocessor core voltage control, multi-phase control has become a commonly used control method to meet the requirements of high power density and high current slew rate. However, the existing multi-phase control methods are still insufficient to meet the ultra-high load transient requirements specified by Intel Corporation in today's voltage regulator specification (VR specification), especially during the load application transient . Therefore, an open-loop control mechanism called quick response was invented to overcome the undershoot problem. During load application transients, this fast response mechanism will immediately turn on the high-side switches of all phases to fully supply the heavy load current ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/08H02M3/155
Inventor 王珽弘李嘉荣戴良彬
Owner RICHTEK TECH
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