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Synchronous or Nonsynchronous Topology? Boost System Performance with the Right DC-DC Converter
Synchronous Rectification Aids Low-Voltage Power Supplies 
同步开关稳压器和控制器使用两个开关元件——高边开关和低边开关。这与非同步开关稳压器不同，后者一般采用单个开关控制高边电压，使用一个高速肖特基二极管作为低边开关。
同步开关稳压器一般将两个开关集成到器件中，而同步控制器仅提供开关驱动信号。无论哪种情况，开关元件均为低RDS(ON)、大功率FET。
由于两个开关的工作时序可控，再加上FET电阻比肖特基二极管低，所以同步开关稳压器和控制器的稳压效率较高。
同步开关稳压器和控制器可采用升压和降压配置。Maxim提供最先进的同步开关稳压器和控制器。
降压型(Buck)同步开关稳压器(内部开关) 
降压型(Buck)同步开关控制器(外部开关)
升压型(Boost)同步开关稳压器(内部开关)
升压/降压型(Buck/Boost)同步开关稳压器(外部开关)
了解现代开关稳压器技术，理解现代开关稳压器IC与传统稳压器的差异。
Technical Documents
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Synchronous or Nonsynchronous Topology? Boost System Performance with the Right DC-DC Converter Synchronous Rectification Aids Low-Voltage Power Supplies 技术文档
现代开关型稳压器技术
November 16, 2020
本文讨论了现代化开关稳压器优于传统设计的关键因素。新产品带来的利益是惊人的：较小的外形尺寸、设计更简单、工作温度低、效率高，以及较高的集成度，提高最终产品的健壮性和可靠性。
参考设计
MAXREFDES1238: Scalable, Single Input, 6 Output, Power Solution for the Versal ACAP Platform
In this design a single 12V input supplies a circuit which outputs 6 separate rails ranging from...
MAXREFDES1263: True Wireless Stereo Cradle and Earbuds
This solution demonstrates a small size, low power, high effective, high accuracy power manageme...
MAXREFDES1260: Li Battery Charger and Monitor System with 3A USB-C Input
The purpose of MAXREFDES1260 is to solve the problem of high-voltage fast charging of 2S battery...
MAXREFDES9002: C-source Reference for Operating the DS28E18 from Cortex-M4 GPIO Pins
Extend an I2C and SPI interface using the DS28E18 with included M4 compatible 1-Wire API and C-d...
MAXREFDES179#参考设计板
The MAXREFDES179 reference design is a complete Universal Serial Bus (USB) type-C PD solution fe...
MAXREFDES1275: 1A,3-Channel LED Driver in Buck Configuration using MAX20050 and its dimming control using MAX32630FTHR
The MAX20050 is a high-brightness LED driver for automotive exterior lighting applications.
MAXREFDES1046：宽输入范围、3.3V/3A输出同步整流、降压型DC-DC转换器，两层电路板设计降低成本
The MAX17574, high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrat...
MAXREFDES1105: Miniature, 5V/2A, Synchronous, No-Opto Flyback DC-DC Converter with 90.4% Efficiency Using MAX17690 and MAX17606
Due to its simplicity and low cost, the flyback converter is the preferred choice for low-to-med...
MAXREFDES1102：小尺寸、24V/250mA、无光耦、反激DC-DC转换器，92%效率
The MAX17690 implements an innovative algorithm to accurately determine the output voltage by se...
MAXREFDES1045: Two-Layer Board, 5V/3A, Wide-Input, Synchronous, Step-Down DC-DC Converter Using the MAX17574
The MAX17574, high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrat...
MAXREFDES1037：72W Offline Flyback Converter
The MAX17595 is a peak-current-mode controller for designing wide input-voltage flyback regulato...
MAXREFDES1004：-73V至-35V输入、5V/100mA输出、Boost转换器
The MAX668/MAX669 constant-frequency, pulse-width modulating (PWM), current-mode DC-DC controlle...
MAXREFDES1088：小尺寸、12V/250mA、同步、无光耦、反激DC-DC转换器，91.9%效率
Due to its simplicity and low cost, the flyback converter is the preferred choice for low-to-med...
MAXREFDES1106: Miniature, 12V/1A, Synchronous, No-Opto Flyback DC-DC Converter with 92% Efficiency Using MAX17690 and MAX17606
Due to its simplicity and low cost, the flyback converter is the preferred choice for low-to-med...
MAXREFDES1101：Miniature, 12V/500mA, No-Opto Flyback DC-DC Converter with 90% Efficiency
Due to its simplicity and low cost, the flyback converter is the preferred choice for low-to-med...
MAXREFDES1238: Scalable, Single Input, 6 Output, Power Solution for the Versal ACAP Platform
In this design a single 12V input supplies a circuit which outputs 6 separate rails ranging from...
MAXREFDES1263: True Wireless Stereo Cradle and Earbuds
This solution demonstrates a small size, low power, high effective, high accuracy power manageme...
MAXREFDES1260: Li Battery Charger and Monitor System with 3A USB-C Input
The purpose of MAXREFDES1260 is to solve the problem of high-voltage fast charging of 2S battery...
MAXREFDES9002: C-source Reference for Operating the DS28E18 from Cortex-M4 GPIO Pins
Extend an I2C and SPI interface using the DS28E18 with included M4 compatible 1-Wire API and C-d...
MAXREFDES179#参考设计板
The MAXREFDES179 reference design is a complete Universal Serial Bus (USB) type-C PD solution fe...
MAXREFDES1275: 1A,3-Channel LED Driver in Buck Configuration using MAX20050 and its dimming control using MAX32630FTHR
The MAX20050 is a high-brightness LED driver for automotive exterior lighting applications.
MAXREFDES1046：宽输入范围、3.3V/3A输出同步整流、降压型DC-DC转换器，两层电路板设计降低成本
The MAX17574, high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrat...
MAXREFDES1105: Miniature, 5V/2A, Synchronous, No-Opto Flyback DC-DC Converter with 90.4% Efficiency Using MAX17690 and MAX17606
Due to its simplicity and low cost, the flyback converter is the preferred choice for low-to-med...
MAXREFDES1102：小尺寸、24V/250mA、无光耦、反激DC-DC转换器，92%效率
The MAX17690 implements an innovative algorithm to accurately determine the output voltage by se...
MAXREFDES1045: Two-Layer Board, 5V/3A, Wide-Input, Synchronous, Step-Down DC-DC Converter Using the MAX17574
The MAX17574, high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrat...
MAXREFDES1037：72W Offline Flyback Converter
The MAX17595 is a peak-current-mode controller for designing wide input-voltage flyback regulato...
MAXREFDES1004：-73V至-35V输入、5V/100mA输出、Boost转换器
The MAX668/MAX669 constant-frequency, pulse-width modulating (PWM), current-mode DC-DC controlle...
MAXREFDES1088：小尺寸、12V/250mA、同步、无光耦、反激DC-DC转换器，91.9%效率
Due to its simplicity and low cost, the flyback converter is the preferred choice for low-to-med...
MAXREFDES1106: Miniature, 12V/1A, Synchronous, No-Opto Flyback DC-DC Converter with 92% Efficiency Using MAX17690 and MAX17606
Due to its simplicity and low cost, the flyback converter is the preferred choice for low-to-med...
MAXREFDES1101：Miniature, 12V/500mA, No-Opto Flyback DC-DC Converter with 90% Efficiency
Due to its simplicity and low cost, the flyback converter is the preferred choice for low-to-med...
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