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Voltage regulator with feedforward circuit

A voltage regulator and voltage regulation technology, applied in the direction of measuring current/voltage, circuit device, adjusting electrical variables, etc., can solve problems such as power consumption of bad pass transistor 112

Active Publication Date: 2022-07-29
NXP USA INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

output current I out The inrush further leads to increased power dissipation in the pass transistor 112 of the undesirable

Method used

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  • Voltage regulator with feedforward circuit
  • Voltage regulator with feedforward circuit
  • Voltage regulator with feedforward circuit

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Embodiment Construction

[0077] The detailed description of the accompanying drawings is intended to be a description of presently preferred embodiments of the invention, and is not intended to represent the only forms in which the invention may be practiced. It is understood that the same or equivalent functions may be performed in different embodiments, which are intended to be included within the spirit and scope of the present invention.

[0078] reference now figure 2 , which shows a schematic circuit diagram of a voltage regulation system 200 according to an embodiment of the present invention, which includes a voltage regulator 202 connected to a current limiting circuit 204 and a first feedforward circuit 206 . The voltage regulation system 200 further includes a control switch 208 , a load capacitor 210 , and a load 212 .

[0079] The voltage regulator 202 is connected to the supply voltage V in between the ground. Supply voltage V in Generated by an external power source (not shown). T...

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Abstract

The voltage regulation system includes a voltage regulator, a current limiting circuit and a feedforward circuit. The voltage regulator regulates the output voltage to the desired voltage level. The current limiting circuit controls the output current of the voltage regulator to the desired current level. A feedforward circuit with fast response time that controls inrush current in the output current due to a drop in output voltage.

Description

technical field [0001] The present invention generally relates to a voltage regulator, and in particular to a feedforward circuit that controls inrush current in the output current of the voltage regulator. Background technique [0002] Integrated circuits such as System-on-Chip (SoC) and Application Specific Integrated Circuits (ASIC) integrate various analog and digital components on a single chip. These components require a stable supply voltage to function properly. Thus, the integrated circuit includes a voltage regulator, such as a Low Dropout Voltage Regulator (LDO), to regulate the supply voltage. The LDO voltage regulator removes noise entering the supply voltage from the voltage source and provides a regulated output voltage even when the supply voltage is very close to the regulated output voltage. The integrated circuit further includes a current limiting circuit to protect the components from damage caused by current surges. [0003] figure 1 Shown is a volt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/573
CPCG05F1/5735G05F1/575G05F3/262G05F1/465H02H9/001G01R19/16552H02H9/025H03F3/45
Inventor 邱亮王猛约翰·皮戈特
Owner NXP USA INC
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