MAX17761

4.5V to 76V, 1A, High-Efficiency, Synchronous Step-Down DC-DC Converter

76V Synchronous Buck Converter with Internal FETs Enables High Efficiency and Low Temperature Rise


Please check latest availability status for a specific part variant.

Description

The MAX17761, high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operates over a 4.5V to 76V input. The converter can deliver up to 1A current. Output voltage is programmable from 0.8V up to 90% of VIN. The feedback voltage regulation accuracy over -40°C to +125°C is ±1.5%.

The device features a peak-current-mode control architecture and can be operated in either the pulse-width modulation (PWM) or pulse-frequency modulation (PFM) control schemes.

The MAX17761 is available in a 12-pin (3mm x 3mm) TDFN package. Simulation models are available.

MAX17761: Functional (or Block) Diagram MAX17761: Functional (or Block) Diagram Enlarge+

Key Features

  • Reduces External Components and Total Cost
    • No Schottky—Synchronous Operation
    • Internal Compensation Components
    • All-Ceramic Capacitors, Compact Layout
  • Reduces Number of DC-DC Regulators to Stock
    • Wide 4.5V to 76V Input
    • Output Adjustable from 0.8V up to 90% of VIN
    • Delivers up to 1A Over Temperature
    • 200kHz to 600kHz Adjustable Frequency with External Clock Synchronization
    • Programmable Current Limit
  • Reduces Power Dissipation
    • Peak Efficiency > 90%
    • PFM Mode Enables Enhanced Light-Load Efficiency
    • Auxiliary Bootstrap LDO for Improved Efficiency
    • 5μA Shutdown Current
  • Operates Reliably in Adverse Industrial Environments
    • Adjustable Soft-Start and Prebiased Power-Up
    • 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

  • Basestation Power Supplies
  • Distributed Supply Regulation
  • General-Purpose Point-of-Load
  • High-Voltage, Single-Board Systems
  • Industrial Control Power Supplies
  • Wall Transformer Regulation
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
minmaxminmaxSee Notes
MAX17761 4.5760.868.4Resistor1InternalYesYes1
200
600
EE-Sim
TDFN-CU/12
$2.15 @1k
See All Step-Down Switching Regulators (403)
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.


MAX17761EVKITA: Evaluation Kit for the MAX17761 in 3.3V Output-Voltage Application
MAX17761EVKITB: Evaluation Kit for the MAX17761 in 5V Output-Voltage Application

Quality and Environmental Data

Request Reliability Report for: MAX17761 
Lead-Free Package Tin (Sn) Whisker Reports

Tools & Models

  • EE-Sim: Design & Simulate MAX17761
  • MAX17761 SIMPLIS Schematic
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    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:
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    Type ID Title
    Evaluation Board9510MAX17761EVKITB Evaluation Kit for the MAX17761 in 5V Output-Voltage Application
    Evaluation Board9509MAX17761EVKITA Evaluation Kit for the MAX17761 in 3.3V Output-Voltage Application