MAX20808

RECOMMENDED FOR NEW DESIGNS

Dual-Output 4A, 3MHz, 2.7V–16V Step-Down Switching Regulator

Shrink Your Designs With the Smallest and Fastest Two Regulators in One Package.

Data Sheet (Rev. 1) Product Selection Table

Part Models: 4
1ku List Price: Starting From $2.79

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Overview

High-Power Density with Low Component Count
- Dual-Output or Dual-Phase Operation
- Single-Supply Operation with Integrated LDO for Bias Generation
- Optional 2.5V to 5.5V External Bias for Higher Efficiency
- Compact 3.5mm x 4.6mm, 21-Pin, FC2QFN Package
- Internal Compensation
Wide Operating Range
- 2.7V to 16V Input Voltage Range
- 0.5V to 5.8V Output Voltage Range
- 500kHz to 3MHz Configurable Switching Frequency
- -40°C to +125°C; Junction Temperature Range
- Three Pin-Strap Programming Pins to Select Different Configurations
- Independent Enable and Power Good for Each Output
Optimized Performance and Efficiency
- 92.5% Peak Efficiency with V_DDH = 12V, V_OUT = 1.8V, and f_SW = 1MHz
- Interleaved 180° Out-of-Phase Operation
- Selectable AMS to Improve Load Transient
- Selectable DCM to Improve Light Load Efficiency
- Active Current Balancing for Dual-Phase Operation (MAX20808 only)

The MAX20808/MAX20808T is a dual-output, fully integrated, highly efficient, step-down DC-DC switching regulator. The regulator is able to operate from 2.7V to 16V input supplies, and each output can be regulated from 0.5V to 5.8V, delivering up to 4A of load current per output. With the MAX20808, the two outputs can be connected in parallel as a single-output, dual-phase regulator that supports up to 8A load current.

The switching frequency of the device can be configured from 500kHz to 3MHz and provides the capability of optimizing the design in terms of solution size and performance.

The MAX20808/MAX20808T utilizes fixed-frequency, current-mode control with internal compensation. The dual-switching regulators operate 180° out-of-phase. The MAX20808/MAX20808T features a selectable advanced modulation scheme (AMS) to provide improved dynamic load transient performance. The device also features selectable discontinuous current mode (DCM) operation to improve light load efficiency. Operation settings and configurable features can be selected by connecting pin-strap resistors from the PGM_ pins to ground.

The MAX20808/MAX20808T has an internal 1.8V low-dropout (LDO) output to power the gate drives (V_CC) and internal circuitry (AVDD). The device also has an optional LDO input pin (LDOIN), allowing connection from a 2.5V to 5.5V bias input supply for optimized efficiency.

The MAX20808/MAX20808T integrates multiple protections including positive and negative overcurrent protection, output overvoltage protection, and overtemperature protection to ensure a robust design.

The MAX20808/MAX20808T is available in a compact 3.5mm x 4.6mm FC2QFN package that supports -40°C to +125°C junction temperature operation. The MAX20808 package has an open top, and MAX20808T package has a closed top.

Applications

Communications Equipment
I/O Pins of an FPGA/DSP/MCU
Memory V_DDQ
Networking Equipment
Point-of-Load Voltage Regulators
Servers and Storage Equipment
μP Chipsets

Part Models: 4
1ku List Price: Starting From $2.79

Documentation

Data Sheet 1

MAX20808: Dual-Output 4A, 3MHz, 2.7V–16V Step-Down Switching Regulator Data Sheet (Rev.1) 09/28/2021

Application Note 1

How to Optimize the Frequency Response of Buck Regulator ICS Externally 07/01/2022

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
MAX20808AFH+	LFCSP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX20808AFH+T	LFCSP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX20808TAFH+	LFCSP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX20808TAFH+T	LFCSP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Tools & Simulations

EE-Sim Power® Tools 2

The EE-Sim DC-DC Converter Tool uses your requirements to quickly create a complete power design including a schematic, BOM with commercially available parts, and time and frequency domain simulations. Your customized schematic can be downloaded for further analysis in the standalone EE-Sim OASIS Simulator, featuring SIMPLIS and SIMetrix SPICE engines.

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SIMPLIS Models 1

MAX20808 SIMPLIS Schematics

Evaluation Kits

Evaluation Kit for the MAX20808

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Features and Benefits

2.7V to 16V Input Voltage Range
0.5V to 5.8V Output Voltage Range
High Efficiency and Power Density
Low Component Count
Dual-Output or Single-Output Dual-Phase Operation
Optimized Performance
Proven PCB Layout
Fully Assembled and Tested

Product Details

The MAX20808 evaluation kit (EV kit) is a reference platform designed for the evaluation of the MAX20808, a dual-output, compact, low-cost, fully integrated, highly efficient, step-down DC-DC switching regulator IC. The IC is in 21-pin, 3.5mm x 4.6mm, 0.5mm pitch, FC2QFN package. This EV kit can deliver up to 4A load per output. The two outputs can be connected as a single-output, dual-phase regulator that supports up to 8A load current. Refer to the MAX20808 IC data sheet for more information.

The EV kit comprises a fully assembled and tested PCB implementation of the MAX20808. Jumper pins, test points, and input/output connectors are included for flex-ibility and convenience in a wide range of applications.