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Headroom Control in Regulator Systems

A voltage regulator and headroom technology, used in control/regulation systems, regulating electrical variables, instruments, etc., to solve problems such as voltage regulator drop, voltage regulator power transfer capability, battery available power limit, equipment subsystem failure, etc.

Active Publication Date: 2020-06-30
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the power delivery capability of the voltage regulator is limited by the power available from the battery
Under certain conditions, the voltage regulator may not be able to provide sufficient power to meet all demands of all device subsystems
When the load current to multiple equipment subsystems increases, the power supply voltage (Vout) at the output of the voltage regulator may drop, causing one or more of the equipment subsystems to fail

Method used

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  • Headroom Control in Regulator Systems
  • Headroom Control in Regulator Systems
  • Headroom Control in Regulator Systems

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Embodiment Construction

[0021] The detailed description set forth below in connection with the accompanying drawings is intended as a description of various configurations and is not intended to represent the only configurations in which the concepts described herein may be practiced. The detailed description includes specific details in order to provide a thorough understanding of various concepts. It will be apparent, however, to one skilled in the art that these concepts may be practiced without these specific details. In some instances, well-known structures and components are shown in block diagram form in order to avoid obscuring the concepts. As used herein, use of the term "and / or" is intended to mean an "inclusive OR" and use of the term "or" is intended to mean an "exclusive OR".

[0022] Linear voltage regulators typically start from the input supply voltage rail (V IN ) to generate a regulated direct current (DC) output voltage rail (V OUT ), where the unwanted overvoltage drops across...

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Abstract

A voltage regulator control implementation dynamically detects and sets a specified headroom for a low dropout (LDO) regulator at different loads to enable the LDO regulator to maintain high performance while improving power efficiency. In one example, an upstream voltage regulator may adaptively adjust an output voltage provided to an input supply rail of a downstream LDO regulator based on indications from the LDO regulator. This adaptively adjusted input voltage enables the downstream LDO regulator to achieve high performance and improved power efficiency across the entire range of load conditions.

Description

[0001] Cross References to Related Applications [0002] This application claims U.S. Provisional Patent Application No. 62 / 374,275, filed August 12, 2016, titled "HEADROOM CONTROL IN REGULATOR SYSTEMS," and U.S. The benefit of Provisional Patent Application No. 62 / 331,850, the disclosure of which is expressly incorporated herein by reference in its entirety. technical field [0003] The present disclosure generally relates to power management systems. More specifically, various aspects of the present disclosure relate to headroom control in voltage regulator systems. Background technique [0004] Wireless devices (eg, cellular phones or smartphones) in a wireless communication system can transmit and receive data for two-way communication. A wireless device may include a transmitter for data transmission and a receiver for data reception. For data transmission, the transmitter may modulate a radio frequency (RF) carrier signal with data to obtain a modulated RF signal, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/575
CPCG05F1/565G05F1/575
Inventor 杜萌萌关华何艾阳容志帆
Owner QUALCOMM INC