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

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

Product Details

Key Features

Applications/Uses

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 4.5
VIN (V) (max) 60
VOUT1 (V) (min) 0.8
VOUT1 (V) (max) 24
IOUT1 (A) (max) 20
Switch Type External
Output Adjust. Method Resistor
Synchronous Switching? Yes
Power Good Signal Yes
# DC-DC Outputs 2
Switching Frequency (kHz) 2200
Design Tools EE-Sim
Package/Pins TQFP/32
Budgetary
Price (See Notes)
3.36
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Simplified Block Diagram

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Parameters

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 4.5
VIN (V) (max) 60
VOUT1 (V) (min) 0.8
VOUT1 (V) (max) 24
IOUT1 (A) (max) 20
Switch Type External
Output Adjust. Method Resistor
Synchronous Switching? Yes
Power Good Signal Yes
# DC-DC Outputs 2
Switching Frequency (kHz) 2200
Design Tools generateDesignEESIMUrl('http://maxim.transim.com/pwm2/designreq/Index?partId=9861', '')
Package/Pins TQFP/32
Budgetary
Price (See Notes)
3.36

Key Features

  • 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

Applications/Uses

  • Computerized Numerical Control
  • Distributed DC Power Systems
  • Industrial Power Supplies
  • Motion Control
  • Programmable Logic Controllers

Description

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.

Simplified Block Diagram

MAX17559: Block Diagram MAX17559: Block Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .