MAX42408

RECOMMENDED FOR NEW DESIGNS

36V, 8A/10A Fully Integrated Buck Converter with 20μA Quiescent Current and Dual-Phase Capability

Analog Devices MAX42408 Product Info

10 February 2026 3

Features

High-Power DC/DC Converter in Small Solution Size
- Operating V_IN range of 4.5V to 36V
- Synchronous DC-DC Converter with Integrated FETs
- 8A/10A Maximum Output Current
- 400kHz and 1.5MHz Fixed Frequency Options
- Fixed Soft-Start Time
  - 2.5ms for 400kHz
  - 3.5ms for 1.5MHz
- 36ns Minimum On-Time
- Programmable Output Voltage
  - 0.8V to 10V for 400kHz
  - 0.8V to 6V for 1.5MHz
- Symmetric and Balanced SUP and PGND Pinout Placement for Better EMI Performance
- Thermally-Enhanced 3.5mm x 3.75mm, 17-Pin FC2QFN Package

High Efficiency at All Load Ranges
- 20μA Quiescent Current in Skip Mode
- Up to 95.6% Eff. at 12VIN/3.3VOUT/400kHz
- Up to 93.9% Eff. at 12VIN/3.3VOUT/1.5MHz
Dual-Phase Operation up to 20A Load Capability
- Frequency Synchronization Input/Output
- 180º Out-of-Phase Between Controller and Target
- Dynamic Current Sharing
Forced PWM and Skip-Mode Operation
99% Duty Cycle Operation with Low Dropout Voltage
Power Good Indicator
Overtemperature and Short-Circuit Protection
-40°C to +125°C Temperature Range
Scalable Power Solution
Footprint Compatible with MAX42405/MAX42406

Part details & applications

The MAX42408/MAX42410 are highly-integrated synchronous buck converters with internal high-side and low-side switches. The ICs deliver up to 8A/10A with input voltage from 4.5V to 36V. The MAX42408/MAX42410 can operate in the dropout mode by running at very high duty cycle, which make them ideal for industrial applications.

The MAX42408/MAX42410 offer programmable output-voltage options. High switching frequency at 1.5MHz and 400kHz options allow for small external components and reduced output ripple. SYNC input programmability enables three modes for optimized performance: forced PWM mode, skip mode with ultra-low quiescent current, and synchronization to an external clock.

The MAX42408/MAX42410 also come with dual-phase capability, which allows up to 20A designs. Two ICs can be configured as a controller and target with dynamic current sharing and 180º out-of-phase operation.

The MAX42408/MAX42410 are available in a small 3.5mm x 3.75mm, 17-pin FC2QFN package. They are pin-to-pin compatible with the MAX42405/MAX42406 (5A to 6A) family of products.

APPLICATIONS

Point-of-Load
Industrial Automation
Distributed DC Power Systems

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