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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.

Modern Switching Regulator 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...

MAXREFDES1284: Himalaya Power Evaluation Platform

Himalaya Power Evaluation Platform provides a proven design to evaluate 12 different high-effici...

MAXREFDES105#: Wrist-Based SpO2, Heart Rate (HR), and Heart Rate Variability (HRV) Health Sensor Platform

The MAXREFDES105# is a wrist-worn wearable reference design for heart-rate, heart-rate variabili...

MAXREFDES9004: C-source Reference for Operating the DS2485 Combined with a DS28E18 from a Cortex-M4 Microcontroller

The MAXREFDES9004 is a reference design showcasing the DS2485 features integrated with an Arm® C...

MAXREFDES1233: 1.8V/10A Core Power Supply for CPUs, Microcontrollers, FPGAs, or DDR2 Interfaces Using the MAX20710

The MAXREFDES1233 provides the internal core voltage (VCCINT) for CPUs, microcontrollers, FPGAs,...

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...

MAXREFDES165# Four-Channel IO-Link Master

The MAXREFDES165# is a fully IO-Link®-compliant, 4-port IO-Link master reference design. This de...

MAXREFDES1257: 24W/48V DC-DC Boost Converter Using the MAX17597 Peak-Current-Mode Controller

The MAXREFDES1257 is a DC-DC boost power supply that delivers up to 500mA at 48V from an 8V to 1...

MAXREFDES178 and Artificial Intelligence Applications

This document describes the cube camera development platform based on the MAX78000 and MAX32666.

MAXREFDES1264: Digitally Controlled Sine-Wave Generator Using the MAX32630FTHR and MAX7400

The MAXREFDES1264 is a reference design for the MAX32630FTHR and MAX7404 produces an accurate va...

MAXREFDES1253: Miniature 17V, 0.75A No Opto Flyback DC to DC Converter Using the MAX17690

The MAXREFDES1253 illustrates techniques using the No Opto Flyback converter to generate isolate...

MAXREFDES185# Configurable IO with Safety Monitoring

The MAXREFDES185# configurable IO reference design demonstrates a fully software-configurable un...

MAXREFDES1034: High-Efficiency Power Supply for TVs Using MAX17506

The MAXREFDES1034 is an auxiliary power supply for TV applications. This design provides a 5V ou...

MAXREFDES1018: Boost, Single-Output, DC-DC Converter, 1V to 3.3V Input, 13.5V/6mA Output

The MAX1606 is a step-up DC-DC converter that contains a 0.5A internal power switch and a 0.5A o...

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...
MAXREFDES1177: PoE Powered Device and 12V/600mA No-Opto Flyback DC-DC Converter Using the MAX17690 and MAX5969B

MAXREFDES1177: PoE Powered Device and 12V/600mA No-Opto Flyback DC-DC Converter Using the MAX17690 and MAX5969B

Power over Ethernet (PoE) is a technology that allows network cables to deliver power to a power...

MAXREFDES1142: Ultra miniature Two Layer 4A, 1.8V Step-Down DC-DC Converter with Integrated Switches Using MAX15051

The MAX15051 is a high-efficiency switching regulator that delivers up to 4A load current at out...

MAXREFDES1186: 7.5W 3.3V Offline Flyback Converter Using the MAX17595

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

MAXREFDES1043: How to Monitor SpO2 Levels Using the MAX30102

The MAXREFDES1043 is designed for SpO2 measurements based on Maxim’s new-generation biosensor—th...