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Synchronous switching regulators and controllers employ two switched elements – a high-side switched element and a low-side switched element. This is in contrast to non-synchronous regulators that traditionally employ a single switched element for controlling the high-side voltage and a high speed Schottky diode which functions as the low-side switch.

Synchronous switching regulators generally integrate both switches into the device, while synchronous controllers provide only the switch drive signals. In both cases the switching elements are low RDS(ON), high-power FETs.

Synchronous switching regulators and controllers generally provide more efficient voltage regulation because the timing of both switches is controllable, plus FETs provide lower resistance than Schottky diodes.

Synchronous switching regulators and controllers are available in both step-up and step-down configurations. We offer the most advanced synchronous switching regulators and controllers available.

Step-Down (Buck) Synchronous Switching Regulators (Internal Switch)
Step-Down (Buck) Synchronous Switching Controllers (External Switch)
Step-Up (Boost) Synchronous Switching Regulators (Internal Switch)
Step-Up/Step-Down (Buck/Boost) Synchronous Switching Regulators 

Learn about modern switching regulator technology to understand how to differentiate a modern switching regulator IC from those using older technology.

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Reference Designs

MAXREFDES179# Reference Design Board

MAXREFDES179# Reference Design Board

The MAXREFDES179 reference design is a complete Universal Serial Bus (USB) type-C PD solution fe...

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...

MAXREFDES1258: 1200W DC-DC Buck Converter Using the MAX15157B

The MAXREFDES1258 is a 1200W, 12V 4-phase DC-DC buck converter that can deliver up to 100A load ...

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.

Remote Monitoring System Sends Email via SMS

Remote monitoring of temperature and an analogue signal via E-mails. On meeting certain alarm co...

MAXREFDES1089: Miniature, 12V/250mA, Synchronous, No-Opto Flyback DC-DC Converter with 91.7% Efficiency

Due to its simplicity and low cost, the flyback converter is the preferred choice for low-to-med...

MAXREFDES1091: Miniature, 12V/250mA, No-Opto Flyback DC-DC Converter with 91% Efficiency Using MAX17690 Reference Design

Due to its simplicity and low cost, the flyback converter is the preferred choice for low-to-med...

MAXREFDES1171: Low-Power Fault Indicators

The MAXREFDES1171 uses Maxim® low-power chips for power grid fault indicators based on the low-p...

MAXREFDES1168: 7V/200mA or 5V/100mA, Iso-Buck DC-DC Converter Using the MAX17681A

The MAX17681/MAX17681A is a high-voltage, highefficiency, iso-buck DC-DC converter designed to p...

MAXREFDES1099: Miniature, 24V/500mA, No-Opto Flyback DC-DC Converter with 93% Efficiency Using the MAX17690

Due to its simplicity and low cost, the flyback converter is the preferred choice for low-to-med...

MAXREFDES1141: 2.4W DC-DC Flyback Converter Using the MAX17596

The MAX17596 is a peak-current-mode controller for designing wide input-voltage flyback regulato...

MAXREFDES1104: Miniature, 5V/2A, Synchronous, No-Opto Flyback DC-DC Converter with 90% Efficiency Using MAX17690 and MAX17606

Due to its simplicity and low cost, the flyback converter is the preferred choice for low-to-med...

MAXREFDES96#: Single-Battery Charger and Fuel Gauge with Boost for Arduino Platforms

The MAXREFDES96# is an Arduino Uno R3-compatible board that provides battery charge, boost, and ...

MAXREFDES1037: 72W Offline Flyback Converter

The MAX17595 is a peak-current-mode controller for designing wide input-voltage flyback regulato...