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4.5V to 60V, 2.5A, High Efficiency, Step-Down DC-DC Converter

Asynchronous Buck Converter With Integrated High Side FET

Product Details

The Himalaya series of voltage regulator ICs, power modules, and chargers enable cooler, smaller, and simpler power supply solutions. The MAX17783C is a high-efficiency, high-voltage, Himalaya step-down DC-DC converter with an integrated high-side MOSFET operating over a wide input-voltage range of 4.5V to 60V. It can deliver up to 2.5A current, and generate output voltages from 0.9V up to 90% of VIN. The device features internal compensation.

The MAX17783C device uses peak current-mode control architecture. The device operates in Low Iq mode at light loads to enable high efficiency. The MAX17783C offers a low minimum on-time that allows high switching frequencies and smaller solution sizes.

The feedback-voltage regulation accuracy is ±1.6% over -40°C to +125°C. The MAX17783C is available in a compact 10-pin (3mm x 3mm) TDFN package. Simulation models are available.

Key Features

  • Reduces External Components and Total Cost
    • Internal Compensation Components
    • All-Ceramic Capacitors, Compact Layout
  • Reduces Number of DC-DC Regulators to Stock
    • Wide 4.5V to 60V Input-Voltage Range
    • Adjustable Output Range from 0.9V up to 90% of VIN
    • Delivers up to 2.5A Over the Temperature Range
    • 400kHz to 2.2MHz Adjustable Frequency with External Clock Synchronization
  • Reduces Power Dissipation
    • 90.4% Peak Efficiency
    • 3.01μA Shutdown Current
    • Low Iq Mode for Enhanced Light-Load Efficiency
  • 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
    • Wide -40°C to +125°C Ambient Operating Temperature Range/ -40°C to +150°C Junction Temperature Range

Applications/Uses

  • Industrial and Commercial Power Distribution
  • General Purpose Point-of-Load
  • Distributed Supply Regulation
  • Base-Station Power Supplies
  • Wall Transformer Regulation
  • High-Voltage, Single-Board Systems
  • Set Top Boxes
  • Audio Power Supplies
  • LED Displays
Parametric specs for Step-Down (Buck) Switching Regulators
VIN (V) (min) 4.5
VIN (V) (max) 60
VOUT1 (V) (min) 0.9
VOUT1 (V) (max) 54
IOUT1 (A) (max) 2.5
Switch Type Internal
Output Adjust. Method Resistor
Power Good Signal Yes
ICC (mA) (typ) 0.204
# DC-DC Outputs 1
Switching Frequency (kHz) 400
Design Tools EE-Sim
Package/Pins TDFN-CU/10
Budgetary
Price (See Notes)
$1.35 @1k
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Simplified Block Diagram

MAX17783C: Typical Application Circuit MAX17783C: Typical Application Circuit Zoom icon

Technical Docs

Design & Development

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Description

The MAX17783CEVKITB# evaluation kit (EV kit) provides a proven design to evaluate the MAX17783C high-efficiency, high-voltage, Himalaya step-down DC-DC converter. The EV kit generates 5V output at load currents up to 2.5A from a 6.5V to 60V input supply. The switching frequency of the EV kit is preset to 500kHz for optimum efficiency and component size. The EV kit features adjustable input under-voltage lockout, adjustable soft-start, open-drain active-low RESET signal, and external clock synchronization. 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 MAX17783C IC data sheet.

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Features

  • Operates from a 6.5V to 60V Input Supply
  • 5V Output Voltage
  • Delivers Up to 2.5A Output Current
  • 500kHz Switching Frequency
  • Enable/UVLO Input, Resistor-Programmable UVLO Threshold
  • Adjustable Soft-Start Time
  • External Clock Synchronization
  • Open-Drain Active-Low RESET Output
  • Overcurrent and Overtemperature Protection Proven PCB Layout
  • Fully Assembled and Tested
  • Complies with CISPR32(EN55032) Class B Conducted Emissions

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Tools & Models

EE-Sim: Design & Simulate MAX17783C

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Support & Training

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Parameters

Parametric specs for Step-Down (Buck) Switching Regulators
VIN (V) (min) 4.5
VIN (V) (max) 60
VOUT1 (V) (min) 0.9
VOUT1 (V) (max) 54
IOUT1 (A) (max) 2.5
Switch Type Internal
Output Adjust. Method Resistor
Power Good Signal Yes
ICC (mA) (typ) 0.204
# DC-DC Outputs 1
Switching Frequency (kHz) 400
Design Tools EE-Sim
Package/Pins TDFN-CU/10
Budgetary
Price (See Notes)
$1.35 @1k

Key Features

  • Reduces External Components and Total Cost
    • Internal Compensation Components
    • All-Ceramic Capacitors, Compact Layout
  • Reduces Number of DC-DC Regulators to Stock
    • Wide 4.5V to 60V Input-Voltage Range
    • Adjustable Output Range from 0.9V up to 90% of VIN
    • Delivers up to 2.5A Over the Temperature Range
    • 400kHz to 2.2MHz Adjustable Frequency with External Clock Synchronization
  • Reduces Power Dissipation
    • 90.4% Peak Efficiency
    • 3.01μA Shutdown Current
    • Low Iq Mode for Enhanced Light-Load Efficiency
  • 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
    • Wide -40°C to +125°C Ambient Operating Temperature Range/ -40°C to +150°C Junction Temperature Range

Applications/Uses

  • Industrial and Commercial Power Distribution
  • General Purpose Point-of-Load
  • Distributed Supply Regulation
  • Base-Station Power Supplies
  • Wall Transformer Regulation
  • High-Voltage, Single-Board Systems
  • Set Top Boxes
  • Audio Power Supplies
  • LED Displays

Description

The Himalaya series of voltage regulator ICs, power modules, and chargers enable cooler, smaller, and simpler power supply solutions. The MAX17783C is a high-efficiency, high-voltage, Himalaya step-down DC-DC converter with an integrated high-side MOSFET operating over a wide input-voltage range of 4.5V to 60V. It can deliver up to 2.5A current, and generate output voltages from 0.9V up to 90% of VIN. The device features internal compensation.

The MAX17783C device uses peak current-mode control architecture. The device operates in Low Iq mode at light loads to enable high efficiency. The MAX17783C offers a low minimum on-time that allows high switching frequencies and smaller solution sizes.

The feedback-voltage regulation accuracy is ±1.6% over -40°C to +125°C. The MAX17783C is available in a compact 10-pin (3mm x 3mm) TDFN package. Simulation models are available.

Simplified Block Diagram

MAX17783C: Typical Application Circuit MAX17783C: Typical Application Circuit 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.