MAX17634B
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MAX17634B

4.5V to 36V, 4.25A, High-Efficiency, Synchronous Step-Down DC-DC Converter

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A High-Efficiency, High-Voltage, Synchronous Step-Down DC-DC Converter with Integrated MOSFETs

Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 2
1ku List Price Starting From $1.56
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
    • 400kHz to 2.2MHz Adjustable Frequency with External Synchronization
    • Available in a 20-Pin, 4mm x 4mm TQFN Package
  • Reduces Power Dissipation
    • Peak Efficiency of 94%
    • 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 RESET (Active Low)
    • 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
Additional Details
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The MAX17634x 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 4.25A current. The MAX17634 is available in three variants: MAX17634A, MAX17634B, and MAX17634C. The MAX17634A and MAX17634B are fixed 3.3V and fixed 5V output voltage parts, respectively. The MAX17634C 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 MAX17634x features peak-current-mode control architecture. The device can be operated in forced pulse-width modulation (PWM), pulse-frequency modulation (PFM), or discontinuous-conduction mode (DCM) to enable high efficiency under full-load and lightload conditions. The MAX17634x 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 MAX17634x is ±1.3%.The device is available in a compact 20-pin (4mm x 4mm) TQFN package. Simulation models are available.

Applications

  • Industrial Control Power Supplies
  • General-Purpose Point-of-Load
  • Distributed Supply Regulation
  • Base Station Power Supplies
  • Wall Transformer Regulation
  • High-Voltage, Single-Board Systems
Part Models 2
1ku List Price Starting From $1.56

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Documentation

Documentation

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Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX17634BATP+
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MAX17634BATP+T
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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 3

MAX17634AEVKIT

Evaluation Kit for the MAX17634A 3.3V Output-Voltage Application

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MAX17634AEVKIT

Evaluation Kit for the MAX17634A 3.3V Output-Voltage Application

Evaluation Kit for the MAX17634A 3.3V Output-Voltage Application

Features and Benefits

  • Wide 4.5V to 36V Input Range
  • Programmed 3.3V Output, 4.25A Load Current
  • 400kHz Switching Frequency
  • EN/UVLO Input, Resistor-Programmable UVLO Threshold
  • Programmed 1ms Soft-Start Time
  • Selectable PWM, PFM, and DCM Modes
  • Open-Drain Active-low RESET Output Pulled Up to 5V of INTVCC
  • Provision for External Frequency Synchronization
  • Overcurrent and Overtemperature Protection
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Detail

The MAX17634AEVKIT# 3.3V output evaluation kit (EV kit) provides a proven design to evaluate the MAX17634A high-voltage, high-efficiency, synchronous step-down DC-DC converter. The EV kit is preset for 3.3V output at load currents of 4.25A and features a 400kHz switching frequency for optimum efficiency and component size. The EV kit features an adjustable input undervoltage lockout, adjustable soft-start, open-drain active-low RESET signal, and external clock synchronization. EV kit specifications, settings, features and benefits are highlighted. The EV kit layout is optimized for thermal performance. For more details about the IC benefits and features, refer to the MAX17634 data sheet.

Applications

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

MAX17634BEVKIT

Evaluation Kit for the MAX17634B 5V Output-Voltage Application

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MAX17634BEVKIT

Evaluation Kit for the MAX17634B 5V Output-Voltage Application

Evaluation Kit for the MAX17634B 5V Output-Voltage Application

Features and Benefits

  • Wide 6.5V to 36V Input Range
  • Programmed 5V Output, 4.25A Load Current
  • 400kHz Switching Frequency
  • EN/UVLO Input, Resistor-Programmable UVLO Threshold
  • Programmed 1ms Soft-Start Time
  • Selectable PWM, PFM, and DCM Modes
  • Open-Drain Active-Low RESET Output Pulled Up To 5V of INTVCC
  • Provision for External Frequency Synchronization
  • Overcurrent and Overtemperature Protection
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Detail

The MAX17634BEVKIT# 5V output evaluation kit (EV kit) provides a proven design to evaluate the MAX17634B high-voltage, high-efficiency, synchronous step-down DC-DC converter. The EV kit is preset for 5V output at load currents of 4.25A and features a 400kHz switching frequency for optimum efficiency and component size. The EV kit features an adjustable input undervoltage lockout, adjustable soft-start, open-drain active-low RESET signal, and external clock synchronization. EV kit specifications, settings, features and benefits are highlighted. The EV kit layout is optimized for thermal performance. For more details about the IC benefits and features, refer to the MAX17634 data sheet.

Applications

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

MAX17634CEVKIT

Evaluation Kit for the MAX17634C 5V Output-Voltage Application

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MAX17634CEVKIT

Evaluation Kit for the MAX17634C 5V Output-Voltage Application

Evaluation Kit for the MAX17634C 5V Output-Voltage Application

Features and Benefits

  • Wide 6.5V to 36V Input Range
  • Programmed 5V Output, 4.25A Load Current
  • 400kHz Switching Frequency
  • EN/UVLO Input, Resistor-Programmable UVLO Threshold
  • Programmed 1ms Soft-Start Time
  • Selectable PWM, PFM, and DCM Modes
  • Open-Drain Active-Low RESET Output Pulled Up To 5V of INTVCC
  • Provision for External Frequency Synchronization
  • Overcurrent and Overtemperature Protection
  • Proven PCB Layout
  • Fully Assembled and Tested
  • Complies with CISPR22(EN55022) Class B Conducted and Radiated Emissions

Product Detail

The MAX17634CEVKIT# 5V output evaluation kit (EV kit) provides a proven design to evaluate the MAX17634C high-voltage, high-efficiency, synchronous step-down DC-DC converter. The EV kit is preset for 5V output at load currents of 4.25A and features a 400kHz switching frequency for optimum efficiency and component size. The EV kit features an adjustable input undervoltage lockout, adjustable soft-start, open-drain active-low RESET signal, and external clock synchronization. EV kit specifications, settings, features and benefits are highlighted. The EV kit also provides a good layout example, which is optimized for Conducted, Radiated EMI and thermal performance. For more details about the IC benefits and features, refer to the MAX17634 data sheet.

Applications

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

Tools & Simulations 1

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