A Comprehensive Guide to Choosing Between LDO (Low Dropout Linear <span style='color:red'>Regulators</span>) and DC-DC (Switching <span style='color:red'>Regulators</span>)
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A Comprehensive Guide to Choosing Between LDO (Low Dropout Linear Regulators) and DC-DC (Switching Regulators)

　　Selecting the appropriate voltage regulator is critical for the stability and efficiency of various circuit systems. Among the numerous types available, LDO (Low Dropout Linear Regulators) and DC-DC (Switching Regulators) are two common voltage stabilizers. This article will thoroughly explore the selection methods for LDO and DC-DC regulators, covering concepts, operating principles, characteristics, and application scenarios.　　A Comprehensive Guide to Selecting LDO (Low Dropout Linear Regulators) and DC-DC (Switching Regulators)　　1. LDO (Low Dropout Linear Regulator)　　1.1 Concept　　LDO stands for Low Dropout Regulator, typically used to regulate high input voltages to lower output voltages. It achieves stable output voltage by adjusting the conduction resistance of its internal transistor.　　1.2 Working Principle　　When the input voltage exceeds the output voltage, the internal transistor enters an amplified state. It dissipates excess power to regulate the output voltage, maintaining it at the set value.　　1.3 Characteristics　　Simple design, low noise, relatively low cost, suitable for applications requiring high precision. However, it has low efficiency and significant thermal distortion.　　2. DC-DC (Switching Regulator)　　2.1 Concept　　DC-DC refers to a switching regulator (DC-to-DC Converter) that converts input voltage to the desired output voltage by switching the state of a switching element (e.g., MOSFET).　　2.2 Working Principle　　DC-DC operates by periodically turning the switching element on and off to control the output voltage magnitude, while a filter removes high-frequency noise from the output waveform.　　2.3 Features　　High efficiency, capable of delivering substantial output power, suitable for applications requiring large voltage drops or enhanced efficiency, but involves complex design and relatively higher cost.　　3. How to Select?　　3.1 Output Voltage Range　　For lower output voltages, an LDO is more suitable; whereas for large voltage drops or higher output power requirements, a DC-DC converter is more appropriate.　　3.2 Efficiency Requirements　　When prioritizing power efficiency, especially under large voltage drops, DC-DC converters typically outperform LDOs.　　3.3 System Complexity　　LDOs may be preferable for simplified design and cost reduction; DC-DC converters are necessary when higher output power and efficiency are required.　　3.4 Ripple and Noise　　In applications sensitive to output ripple and noise, LDOs are generally more suitable than DC-DC converters because they produce lower ripple and noise.　　4. Application Scenarios　　4.1 LDO Application Scenarios　　Applications requiring high output voltage accuracy, low output current, and strict ripple/noise specifications.　　4.2 DC-DC Applications　　Applications requiring large voltage drops, high output power, and high efficiency, such as mobile devices, power amplifiers, and communication equipment.　　4.3 Comprehensive Considerations　　In practical applications, the optimal regulator type must be selected by comprehensively evaluating system power consumption, output load conditions, stability requirements, and cost factors.　　As common voltage regulators, LDOs and DC-DC converters play vital roles in electronic product design. Selecting the appropriate regulator type depends on specific application requirements, including output voltage range, efficiency demands, system complexity, and ripple noise. During the selection process, a comprehensive evaluation of all factors is necessary to ensure the circuit system operates stably, reliably, and efficiently.
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Release time：2025-12-31 17:31 reading：321 Continue reading>>
China's Tencent falls 3% after disappointing earnings and scrutiny from Chinese regulators
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China's Tencent falls 3% after disappointing earnings and scrutiny from Chinese regulators

A flag bearing the Tencent logo is displayed alongside a Chinese flag outside the company's offices in Beijing, China.Tencent's stock was in focus after the company posted a quarterly earnings report on Wednesday that missed analyst expectations.Thursday morning trade saw the Chinese tech giant's Hong Kong-listed stock sliding around 3 percent following the news. The company's profit for the quarter ending in June dipped 2 percent to 17.87 billion yuan ($2.59 billion), which was weaker than analysts had anticipated. That was also the first decline in profit for the company in almost 13 years."The disappointment will be broad based from these results, particularly in a market that's still sensitive to the downside globally at the moment," said Douglas Morton, head of research at Northern Trust Capital Markets.Being more specific in his critique of Tencent's performance, Leo Sun, a technology specialist at The Motley Fool, said: "The big surprise was definitely the online gaming business."Speaking with CNBC's "Squawk Box," Sun said the 6 percent year-over-year growth from the segment was "pretty disappointing" as it usually reports numbers in the double digits. Furthermore, he added, most of the growth came from older games such as "Honor of Kings."To exacerbate matters, Sun pointed to the company's reported 19 percent sequential fall in smartphone gaming revenue, saying it is a result of Tencent's inability to obtain regulatory approval for the sale of in-game items in the mobile version of the popular battle royale game "PlayerUnknown's Battlegrounds."According to the Wall Street Journal, the roadblock toward approvalis largely due to "PlayerUnknown's Battlegrounds" being a product developed by a company out of South Korea, a country that has had strained ties with China."PC games were also a problem," Sun said, pointing to an 8 percent sequential fall in revenues as personal computer gamers made the transition toward mobile devices.Regulatory woes likely to be 'short-term'The further fall in Tencent's stock comes days after it removed the game "Monster Hunter: World" from its WeGame distribution platform following multiple complaints by Chinese regulatory authorities. That move has led some to question the possibility of more regulatory woes ahead for the tech giant.The removal of "Monster Hunter: World" a week into the title's China launch "really hurt," Sun said, adding, however, that it is unlikely to be permanent due to the importance of video games in Chinese tech.Such issues with regulators are not new for Tencent, he told CNBC, saying the company has made tweaks to games such as "Honor of Kings" and Activision Blizzard's "World of Warcraft" in the past to satisfy the demands of regulators.Echoing that sentiment, Morton said the Chinese regulatory environment "has always been stretched."Additionally, Morton said, changes at the top of the Chinese regulator and the global rise in popularity of what he terms "tactical tournament games" have likely led the authorities to be "slightly more cautious than they otherwise would be.""Eventually, the games will probably be approved again, but for now, there'll probably be a bit of short-term pain," Sun said.
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Release time：2018-08-20 00:00 reading：1377 Continue reading>>
EU <span style='color:red'>Regulators</span> Again Halt Qualcomm-NXP Investigation
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EU Regulators Again Halt Qualcomm-NXP Investigation

　　European Union regulators have for a second time put the brakes on their investigation into the proposed $38 billion acquisition of NXP Semiconductors by Qualcomm.　　The European Commission said in a posting on its website that the investigation was suspended on Aug. 17. The Reuters news service reported Wednesday (Sept. 6) that Qualcomm and NXP failed to supply regulators with key information about the proposed merger and that the investigation would resume after the information was received.　　Qualcomm (San Diego) announced last October the deal, valued at about $38 billion, to acquire NXP (Eindhoven, the Netherlands). The EU launched an investigation into the proposed acquisition in June, citing concerns into the merged entity's position in NFC, mobile devices and vehicle-to-vehicle and vehicle-to-infrastructure technology.　　The suspension marks the second time that EC regulators have paused the investigation to await documents from the firms. They also suspended the acquisition in June, shortly after it began.　　The deadline for regulators to conclude their investigation is Oct. 17. According to the Reuters report, the EC will specify a new target date for completion of the investigation once they receive the requested information.　　Analysts do not generally believe that there is much danger that the acquisition will be nixed by regulators. The two companies' product portfolios generally speaking have very little overlap, and the deal has already received a green light from regulators in the U.S. and elsewhere.　　Neither the EC website or the Reuters report specified what information the regulators are waiting for. Both Qualcomm and NXP did not immediately respond to a request for comment on the issue by EE Times.
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Release time：2017-09-07 00:00 reading：1320 Continue reading>>

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