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reference designMAX20840T

Analog Devices MAX20840T

40A, 2MHz, 2.7V to 16V Integrated Step-Down Switching Regulator with PMBus

Overview

TopologyBuck Converter
Input voltage2.6-16 V
Switching frequency500-2000 kHz
Output 15.8 V / 40 A

Description

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.

Features

  • High Power Density with Low Component Count
  • Compact 4.3mm x 6.55mm, 16-Pin FC2QFN PackageInternal 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

Typical applications

  • Communications Equipment, Networking Equipment
  • Data Center Power
  • Point-of-Load Voltage Regulators

More information

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L(nH)
LR(nH)
IR(A)
ISAT,10%(A)
ISAT,30%(A)
RDC(mΩ)
fres(MHz)
Material
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744309033
SPECWE-HCM SMT High Current Flat Wire Inductor, 330 nH, 310 nH
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-HCM SMT High Current Flat Wire Inductor
Inductance330 nH
Rated Inductance310 nH
Rated Current47.5 A
Saturation Current @ 10%58 A
Saturation Current @ 30%65.7 A
DC Resistance0.165 mΩ
Self Resonant Frequency28 MHz
MaterialMnZn 
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