MAX17546

4.5V–42V, 5A, High-Efficiency, Synchronous Step-Down DC-DC Converter with Internal Compensation

42V, 5A Internal FET Synchronous Buck Converter Enables High Efficiency and Small Solution Size


Please check latest availability status for a specific part variant.

Description

The MAX17546 high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated high-side MOSFET operates over a 4.5V to 42V input. The converter can deliver up to 5A and generates output voltages from 0.9V up to 0.9 x VIN. The feedback (FB) voltage is accurate to within ±1.4% over -40°C to 125°C.

The MAX17546 uses peak current-mode control. The device can be operated in the pulse-width modulation (PWM), pulse-frequency modulation (PFM), and discontinuous conduction mode (DCM) control schemes.

The device is available in a 20-pin (5mm x 5mm) Thin QFN (TQFN) package. Simulation models are available.
MAX17546: Block Diagram MAX17546: Block Diagram Enlarge+

Key Features

  • Reduces External Components and Total Cost
    • No Schottky-Synchronous Operation
    • Internal Compensation for Any Output Voltage
    • Built-In Soft-Start
    • All-Ceramic Capacitors, Compact Layout
  • Reduce Number of DC-DC Regulators to Stock
    • Wide 4.5V to 42V Input
    • Adjustable 0.9V to 0.9 x VIN Output
    • 100kHz to 2.2MHz Adjustable Switching Frequency with External Synchronization
  • Reduces Power Dissipation
    • Peak Efficiency > 95%
    • PFM/DCM Modes Enable Enhanced Light-Load Efficiency
    • Auxiliary Bootstrap LDO for Improved Efficiency
    • 3.5µA Shutdown Current
  • Operates Reliably in Adverse Industrial Environments
    • Hiccup or Latchoff Mode Overload Protection
    • DL to LX Short Detection Feature
    • Built-In Output Voltage Monitoring with Active-Low RESET
    • Programmable EN/UVLO Threshold
    • Monotonic Startup into Prebiased Load
    • Overtemperature Protection
    • High Industrial -40°C to +125°C Ambient Operating Temperature Range / -40°C to +150°C Junction Temperature Range

Applications/Uses

  • Base Station Power Supplies
  • Distributed Supply Regulation
  • General-Purpose Point-of-Load
  • High-Voltage Single-Board Systems
  • Industrial Power Supplies
  • Wall Transformer Regulation

See parametric specs for Step-Down Switching Regulators (408)


Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Output Adjust. MethodIOUT1
(A)
Switch TypeSynchronous SwitchingPower Good SignalDC-DC OutputsOper. Freq.
(kHz)
Design ToolsPackage/PinsBudgetary
Price
minmaxminmaxmaxSee Notes
MAX17546 4.5420.937Resistor5
External
Internal
YesYes12200EE-Sim
TQFN-CU/20
$3.05 @1k

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX17546EVKITA: Evaluation Kit for the MAX17546 3.3V Output-Voltage Application
MAX17546EVKITB: Evaluation Kit for the MAX17546 5V Output-Voltage Application

Tools & Models

  • EE-Sim: Design & Simulate MAX17546
  • MAX17546 SIMPLIS Schematic
  • Request Reliability Report for: MAX17546 
    Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

    Quality Management System >
    Environmental Management System >

     
    Status:
    Package:
    Temperature:

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    Type ID Title
    Evaluation Board8923MAX17546EVKITB Evaluation Kit for the MAX17546 5V Output-Voltage Application
    Evaluation Board8922MAX17546EVKITA Evaluation Kit for the MAX17546 3.3V Output-Voltage Application