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4.5V–60V, 2A, High-Efficiency, Synchronous Step-Down DC-DC Converter with Internal Compensation

60V Synchronous Buck Converter with Internal FETs Enables High Efficiency and Low Temperature Rise

Product Details

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 4.5
VIN (V) (max) 60
VOUT1 (V) (min) 0.9
VOUT1 (V) (max) 54
IOUT1 (A) (max) 2
Switch Type Internal
Synchronous Switching? Yes
Power Good Signal Yes
ICC (mA) (typ) 5.65
# DC-DC Outputs 1
Switching Frequency (kHz) 400
Design Tools EE-Sim
Package/Pins TDFN-CU/12
Budgetary
Price (See Notes)
1.57
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Simplified Block Diagram

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Parameters

Parametric specs for Step-Down Switching Regulators
VIN (V) (min) 4.5
VIN (V) (max) 60
VOUT1 (V) (min) 0.9
VOUT1 (V) (max) 54
IOUT1 (A) (max) 2
Switch Type Internal
Synchronous Switching? Yes
Power Good Signal Yes
ICC (mA) (typ) 5.65
# DC-DC Outputs 1
Switching Frequency (kHz) 400
Design Tools generateDesignEESIMUrl('http://maxim.transim.com/pwm2/designreq/Index?partId=29518', '')
Package/Pins TDFN-CU/12
Budgetary
Price (See Notes)
1.57

Key Features

  • Reduces External Components and Total Cost
    • No Schottky-Synchronous Operation
    • Internal Compensation for Any Output Voltage
    • All-Ceramic Capacitors, Compact Layout
  • Reduces Number of DC-DC Regulators to Stock
    • Wide 4.5V to 60V Input
    • Adjustable 0.9V to (0.9 × VIN) Output
    • Up to 2A Peak-Load Current
    • 400kHz to 2.2MHz Adjustable Switching Frequency with External Synchronization
  • Reduces Power Dissipation
    • Peak Efficiency of 91.6%
    • Auxiliary Bootstrap LDO for Improved Efficiency
    • 4.65μA Shutdown Current
  • Operates Reliably in Adverse Industrial Environments
    • Hiccup-Mode Overload Protection
    • Adjustable Soft-Start
    • Built-In Output-Voltage Monitoring with Active-Low RESET
    • Programmable EN/UVLO Threshold
    • Monotonic Startup into Prebiased Load
    • Overtemperature Protection
    • Wide Industrial -40°C to +125°C Ambient Operating Temperature Range/ -40°C to +150°C Junction Temperature Range
    • Complies with CISPR22 (EN55022) Class B Conducted and Radiated Emissions

Applications/Uses

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

Description

The Himalaya series of voltage regulator ICs, power modules, and chargers enable cooler, smaller, and simpler power-supply solutions. The MAX17643 high-efficiency, high-voltage, Himalaya synchronous step-down DC-DC converter with integrated MOSFETs operates over a 4.5V to 60V input. The converter can deliver up to 2A and generates output voltages from 0.9V up to (0.9 x VIN)V. The feedback (FB) voltage is accurate to within ±.4% over -40°C to +125°C. Built-in compensation across the output- voltage range eliminates the need for external components. The MAX17643 features peak-current-mode control architecture and operates in fixed frequency forced PWM mode. The current-limit settings of the MAX17643 allow the device to supply load-current peaks up to 2A. This allows the device to support pulsed load applications such as communication modules with minimal output-voltage droop. The MAX17643 offers a low minimum on-time that allows high switching frequencies and a smaller solution size.

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

Simplified Block Diagram

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 .