MAX17559

PRODUCTION

60V, Dual-Output, Synchronous Step-Down Controller

Wide Input Voltage Dual-Output Controller Enables Design Flexibility for Industrial Applications

Data Sheet (Rev. 0) Product Selection Table
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Overview

  • Wide Range of Operation
    • Wide 4.5V to 60V Input Voltage Range
    • Wide 0.8V to 24V Output Voltage Range
    • RSENSE or Inductor DCR Current-Sensing
    • Fixed 180° Out-of-Phase Operation
    • Adjustable 100kHz to 2.2MHz Switching Frequency
    • Independent Enable and PGOOD
    • Available in a Lead(Pb)-Free 7mm × 7mm, 32-Pin TQFP Package
  • Enhances Power Efficiency
    • Low-Impedance Gate Drives for High Efficiency
    • DCM Operation at Light Loads
    • Auxiliary Bootstrap LDO
  • Operates Reliably in Adverse Industrial Environments
    • Independent Adjustable Soft-Start/Stop or Tracking
    • Current Selectable Foldback or Latchoff Limits MOSFET Heat Dissipation During a Short-Circuit Condition
    • Operates Over the -40°C to +125°C Temperature Range
    • Output Overvoltage and Overtemperature Protections

The MAX17559 is a dual-output, synchronous step-down controller that drives nMOSFETs. The device uses a constant-frequency, peak-current-mode architecture.

The two outputs can be configured as independent voltage rails. Input capacitor size is minimized by running the two outputs 180° out-of-phase.

The IC supports current sensing using either an external current-sense resistor for accuracy or an inductor DCR for improved system efficiency. Current foldback or latchoff limits MOSFET power dissipation under short-circuit conditions.

The IC provides independent adjustable soft-start/stop for each output and can start up monotonically into a prebiased output. The IC can be configured in either PWM or DCM modes of operation, depending on whether constant-frequency operation or light-load efficiency is desired.

The IC operates over the -40°C to +125°C temperature range and is available in a lead(Pb)-free, 7mm × 7mm, 32-pin TQFP, package.

Applications

  • Computerized Numerical Control
  • Distributed DC Power Systems
  • Industrial Power Supplies
  • Motion Control
  • Programmable Logic Controllers
MAX17559
60V, Dual-Output, Synchronous Step-Down Controller
MAX17559: Block Diagram
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Documentation

Data Sheet 1

Reliability Data 1

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
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MAX17558
PRODUCTION 60V, Dual-Output, Synchronous Step-Down Controller
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Tools & Simulations

EE-Sim Power® Tools 1

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

Evaluation Kits

MAX17559EVKIT

Evaluation Kit for MAX17559

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Features and Benefits

  • 6V to 60V Input Range
  • Output Rails: VOUT1: 3.3V/15A, VOUT2: 5V/8A
  • 150kHz Switching Frequency
  • Independent Enable Inputs
  • Independent Adjustable Soft-Start Time
  • Configurable Tracking Operation
  • Selectable PWM/DCM Modes of Operation
  • Fixed 180° Out-of-Phase Operation
  • Selectable Foldback/Latchoff Current Limit
  • Programmable Current-Limit Threshold
  • Independent PGOOD Outputs
  • Overcurrent, Overvoltage, and Overtemperature Protection
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Details

The MAX17559 EV kit is a proven design to evaluate the dual synchronous step-down regulator that provides independent 3.3V and 5V outputs capable of driving 8A and 15A loads from the 6V to 60V input-voltage range. Operating the two regulators 180° out-of-phase significantly reduces the peak input ripple current, allowing the use of smaller, less expensive components, while minimizing parts count. The EV kit features adjustable input undervoltage lockout, soft-start/stop time, and current-limit threshold, as well as selectable PWM/DCM modes, foldback/latchoff current limit, and independent open-drain PGOOD signals. By disabling channel 2, the evaluation kit is capable of operating from a lower input supply (4.5V to 60V), providing a single 3.3V output driving up to 15A.

Applications

  • Computerized Numerical Control
  • Distributed DC Power Systems
  • Industrial Power Supplies
  • Motion Control
  • Programmable Logic Controllers
MAX17559EVKIT
Evaluation Kit for MAX17559

Reference Designs

MAXREFDES1039
MAXREFDES1039
MAXREFDES1039 Circuits from the lab

64W and 48W Dual Output DC-DC Buck Converter Using the MAX17559

View Detailed Reference Design

Features and Benefits

  • Wide 4.5V to 60V Input Voltage Range
  • Wide 0.8V to 24V Output Voltage Range
  • RSENSE or Inductor DCR Current-Sensing
  • Fixed 180° Out-of-Phase Operation
  • Adjustable 100kHz to 2.2MHz Switching Frequency
  • Independent Enable and PGOOD
  • Available in a Lead(Pb)-Free 7mm × 7mm, 32-Pin TQFP Package
  • Enhances Power Efficiency
    • Low-Impedance Gate Drives for High Efficiency
  • DCM Operation at Light Loads
  • Auxiliary Bootstrap LDO
  • Operates Reliably in Adverse Industrial Environments
  • Independent Adjustable Soft-Start/Stop or Tracking
  • Current Selectable Foldback or Latch-off Limits
  • MOSFET Heat Dissipation During a Short-Circuit Condition
  • Operates Over the -40°C to +125°C Temperature Range
  • Output Overvoltage and Overtemperature Protections
MAXREFDES1039
64W and 48W Dual Output DC-DC Buck Converter Using the MAX17559
MAXREFDES1039

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