Analog Devices MAX17643 Product Info

• 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 × V_IN) 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 CISPR32 (EN55032) Class B Conducted and Radiated Emissions

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 V_IN)V. The feedback (FB) voltage is accurate to within ±1.4% 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.

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
• Pulsed-Load Applications
• Communication Modules