MAX17633

4.5V to 36V, 3.5A, High-Efficiency, Synchronous Step-Down DC-DC Converter

Wide Input Voltage, 3.5A Internal FET Synchronous Buck Converter Ideal for Industrial Applications


Please check latest availability status for a specific part variant.

Description

The MAX17633 is a high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operating over an input voltage range of 4.5V to 36V. It can deliver up to 3.5A current. The MAX17633 is available in three variants MAX17633A, MAX17633B, and MAX17633C. The MAX17633A and MAX17633B are the fixed 3.3V and fixed 5V output voltage parts, respectively. MAX17633C is an adjustable output voltage (from 0.9V up to 90% of VIN) part. Built-in compensation across the output voltage range eliminates the need for external components.

The MAX17633 features peak-current-mode control architecture. The device can be operated in the forced pulsewidth modulation (PWM), or pulse-frequency modulation (PFM), or discontinuous-conduction mode (DCM) to enable high efficiency under full-load and light-load conditions. The MAX17633 offers a low minimum on-time that allows high switching frequencies and a smaller solution size.

The feedback-voltage-regulation accuracy over -40°C to +125°C for the MAX17633A, MAX17633B, and MAX17633C is ±1.3%.The device is available in a compact 20-pin (4mm × 4mm) TQFN package. Simulation models are available.

MAX17633: Typical Application Circuit MAX17633: Typical Application Circuit 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 36V Input
    • Adjustable Output Range from 0.9V up to 90% of VIN
    • Delivers up to 3.5A Over the Temperature Range
    • 400kHz to 2.2MHz Adjustable Frequency with External Synchronization
    • Available in a 20-Pin, 4mm × 4mm TQFN Package
  • Reduces Power Dissipation
    • Peak Efficiency > 93%
    • PFM and DCM Modes Enable Enhanced Light-Load Efficiency
    • Auxiliary Bootstrap Supply (EXTVCC) for Improved Efficiency
    • 2.8µA Shutdown Current
  • Operates Reliably in Adverse Industrial Environments
    • Hiccup-Mode Overload Protection
    • Adjustable and Monotonic Startup with Prebiased Output Voltage
    • Built-in Output-Voltage Monitoring with Active-Low RESET
    • Programmable EN/UVLO Threshold
    • 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 Control Power Supplies
  • Wall Transformer Regulation
Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Preset VOUT
(V)
Output Adjust. MethodIOUT1
(A)
Switch TypeSynchronous SwitchingPower Good SignalDC-DC OutputsOper. Freq.
(kHz)
Design ToolsPackage/PinsBudgetary
Price
minmaxminmaxSee Notes
MAX17633 4.5360.932.4
3.3
5
Preset
Resistor
3.5InternalYesYes1
400
2200
EE-Sim
TQFN-CU/20
$1.96 @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.


MAX17633BEVKIT: Evaluation Kit for the MAX17633 5V Output-Voltage Application
MAX17633AEVKIT: Evaluation Kit for the MAX17633 3.3V Output-Voltage Application
MAX17633CEVKIT: Evaluation Kit for the MAX17633 5V Output-Voltage Application

Quality and Environmental Data

Request Reliability Report for: MAX17633 
Lead-Free Package Tin (Sn) Whisker Reports

Tools & Models

  • EE-Sim: Design & Simulate MAX17633
  • MAX17633 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 Board9979MAX17633CEVKIT Evaluation Kit for the MAX17633 5V Output-Voltage Application
    Evaluation Board9978MAX17633BEVKIT Evaluation Kit for the MAX17633 5V Output-Voltage Application
    Evaluation Board9937MAX17633AEVKIT Evaluation Kit for the MAX17633 3.3V Output-Voltage Application