MAX20840T
PRODUCTION40A, 2MHz, 2.7V to 16V Integrated Step-Down Switching Regulator with PMBus
- Part Models
- 2
- 1ku List Price
- Starting From $5.48
Overview
- High Power Density with Low Component Count
- Compact 4.3mm x 6.55mm, 16-Pin FC2QFN Package
- Internal Compensation
- Single-Supply Operation with Integrated LDO for Bias Generation
- Wide Operating Range
- 2.7V to 16V Input Voltage Range
- 0.4V to 5.8V Output Voltage Range
- 500kHz to 2MHz Configurable SwitchingFrequency
- -40°C to +125°C Junction Temperature Range
- Optimized Performance and Efficiency
- 94.5% Peak Efficiency with VDDH = 12V andVOUT = 1.8V
- High Efficiency with Optional External Bias Input Supply
- AMS to Improve Load-Transient Response
- Differential Remote Sense
- PMBus Interfac
- Adaptive Voltage Scaling of 0.4V to 0.8V Reference Range
- PMBus Telemetry of Output Current, OutputVoltage, Input Voltage, and Junction Temperature
The MAX20840T is a fully integrated, highly efficient, step-down DC-DC switching regulator with a PMBus interface. The device operates from 2.7V to 16V input supplies, and the output can be adjusted from 0.4V to 5.8V, delivering up to 40A of load current.
The switching frequency of the device can be configured from 500kHz to 2MHz to provide optimization of the design in terms of size and performance.
The MAX20840T utilizes fixed-frequency, current-mode control with internal compensation. The IC features selectable advanced modulation scheme (AMS) to provide improved performance during fast load transients. Operation settings and configurable features can be selected by connecting a pin-strap resistors from PGM_ pins to ground or using PMBus commands.
The MAX20840T has an internal 1.8V LDO output to power the gate drives (VCC) 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 IC has multiple protections including positive and negative overcurrent protection, output overvoltage protection, and overtemperature protection to ensure robust design.
The device is available in a 4.3mm x 6.55mm FC2QFN package. It supports -40°C to +125°C junction temperature operation. The MAX20840T is footprint compatible with the MAX20830/MAX20830T, MAX20810, and MAX20815.
Applications
- Data Center Power
- Communications Equipment
- Networking Equipment
- Servers and Storage
- Point-of-Load Voltage Regulators
Documentation
Data Sheet 1
User Guide 2
Product Selector Card 1
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 |
|---|---|---|---|
| MAX20840TAFE+ | 16-Lead FC2QFN (4.3mm x 6.55mm x 0.7mm) | ||
| MAX20840TAFE+T | 16-Lead FC2QFN (4.3mm x 6.55mm x 0.7mm) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 20, 2026 - 2571E PIN/ERRATA |
||
| MAX20840TAFE+T | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareEvaluation Kits
Evaluation Kit for MAX20840T
Resources
Latest Discussions
No discussions on MAX20840T yet. Have something to say?
Start a Discussion on EngineerZone®