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42V, 1A, Ultra-Small, High-Efficiency, Synchronous Step-Down DC-DC Converter

42V Synchronous Buck Converter with Internal FETs Enables High Efficiency

Product Details

The MAX17542G high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operates over 4.5V to 42V input. The converter can deliver up to 1A and generates output voltages from 0.9V up to 0.92 x VIN. The feedback (FB) voltage is accurate to within ±1.7% over -40°C to +125°C.

The MAX17542G uses peak-current-mode control with pulse-width modulation (PWM) and operates with fixed 600kHz switching frequency at any load. The device is available in a 10-pin (3mm x 2mm) TDFN package. Simulation models are available.

Key Features

  • Reduces External Components and Total Cost
    • No Schottky-Synchronous Operation
    • All-Ceramic Capacitors, Ultra-Compact Layout
  • Reduces Number of DC-DC Regulators to Stock
    • Wide 4.5V to 42V Input
    • Adjustable 0.9V to 92%VIN Output
    • Delivers Up to 1A
  • Reduces Power Dissipation
    • Peak Efficiency > 90%
    • Shutdown Current = 0.9μA (typ)
  • Operates Reliably in Adverse Industrial Environments
    • Hiccup-Mode Current Limit, Sink Current Limit, and Autoretry Startup
    • Built-In Output-Voltage Monitoring (Active-Low RESET Pin)
    • Programmable EN/UVLO Threshold
    • Adjustable Soft-Start and Prebiased Power-Up
    • High Industrial -40°C to +125°C Ambient Operating Temperature Range / -40°C to +150°C Junction Temperature Range

Applications/Uses

  • Base Station, VOIP, Telecom
  • Battery-Powered Equipment
  • General-Purpose Point of Load
  • Home Theatre
  • HVAC and Building Control
  • Industrial Process Control
Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 4.5
VIN (V) (max) 42
VOUT1 (V) (min) 0.9
VOUT1 (V) (max) 37
IOUT1 (A) (max) 1
Switch Type Internal
Output Adjust. Method Resistor
Synchronous Switching? Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 600
Design Tools EE-Sim
Package/Pins TDFN/10
Budgetary
Price (See Notes)
$1.63 @1k
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Simplified Block Diagram

MAX17542G: Block Diagram MAX17542G: Block Diagram Zoom icon

Technical Docs

Design & Development

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Description

The MAX17542G 3.3V EV kit provides a proven design to evaluate the MAX17542G 3.3V high-efficiency, high-voltage, synchronous step-down DC-DC converter in a TDFN package. The EV kit generates 3.3V at load currents up to 1A from a 5V to 42V input supply. The EV kit features a 600kHz fixed switching frequency for optimum efficiency and component size. The EV kit features a forced-PWM control scheme that provides constant switching- frequency operation at all load and line conditions.

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Features

  • Operates from a 5V to 42V Input Supply
  • 3.3V Output Voltage
  • 1A Output Current
  • 600kHz Switching Frequency
  • Enable/UVLO Input
  • Resistor-Programmable UVLO Threshold
  • Open-Drain Active-Low RESET Output
  • Overcurrent and Overtemperature Protection
  • Proven PCB Layout
  • Fully Assembled and Tested

Description

The MAX17542G 5V Output EV kit provides a proven design to evaluate the MAX17542G 5V high-efficiency, high-voltage, synchronous step-down DC-DC converter in a TDFN package. The EV kit generates 5V at load currents up to 1A from a 6V to 42V input supply. The EV kit features a 600kHz fixed switching frequency for optimum efficiency and component size. The EV kit features a forced-PWM control scheme that provides constant switching-frequency operation at all load and line conditions.

View Details

Features

  • Operates from a 6V to 42V Input Supply
  • 5V Output Voltage
  • 1A Output Current
  • 600kHz Switching Frequency
  • Enable/UVLO Input
  • Resistor-Programmable UVLO Threshold
  • Open-Drain Active-Low RESET Output
  • Overcurrent and Overtemperature Protection
  • Proven PCB Layout
  • Fully Assembled and Tested

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Tools & Models

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Parameters

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 4.5
VIN (V) (max) 42
VOUT1 (V) (min) 0.9
VOUT1 (V) (max) 37
IOUT1 (A) (max) 1
Switch Type Internal
Output Adjust. Method Resistor
Synchronous Switching? Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 600
Design Tools EE-Sim
Package/Pins TDFN/10
Budgetary
Price (See Notes)
$1.63 @1k

Key Features

  • Reduces External Components and Total Cost
    • No Schottky-Synchronous Operation
    • All-Ceramic Capacitors, Ultra-Compact Layout
  • Reduces Number of DC-DC Regulators to Stock
    • Wide 4.5V to 42V Input
    • Adjustable 0.9V to 92%VIN Output
    • Delivers Up to 1A
  • Reduces Power Dissipation
    • Peak Efficiency > 90%
    • Shutdown Current = 0.9μA (typ)
  • Operates Reliably in Adverse Industrial Environments
    • Hiccup-Mode Current Limit, Sink Current Limit, and Autoretry Startup
    • Built-In Output-Voltage Monitoring (Active-Low RESET Pin)
    • Programmable EN/UVLO Threshold
    • Adjustable Soft-Start and Prebiased Power-Up
    • High Industrial -40°C to +125°C Ambient Operating Temperature Range / -40°C to +150°C Junction Temperature Range

Applications/Uses

  • Base Station, VOIP, Telecom
  • Battery-Powered Equipment
  • General-Purpose Point of Load
  • Home Theatre
  • HVAC and Building Control
  • Industrial Process Control

Description

The MAX17542G high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operates over 4.5V to 42V input. The converter can deliver up to 1A and generates output voltages from 0.9V up to 0.92 x VIN. The feedback (FB) voltage is accurate to within ±1.7% over -40°C to +125°C.

The MAX17542G uses peak-current-mode control with pulse-width modulation (PWM) and operates with fixed 600kHz switching frequency at any load. The device is available in a 10-pin (3mm x 2mm) TDFN package. Simulation models are available.

Simplified Block Diagram

MAX17542G: Block Diagram MAX17542G: Block Diagram 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