Analog Devices MAX17644 Product Info

• 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 Voltage Range from 0.9V up to 90% of V_IN
  • Delivers up to 2.7A Over the Temperature Range
  • 400kHz to 2.2MHz Adjustable Frequency with External Clock Synchronization
  • Available in a 16-Pin, 3mm x 3mm TQFN Package
• Reduces Power Dissipation
  • Peak Efficiency of 95.41%
  • 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 Active-Low RESET
  • Programmable EN/UVLO Threshold
  • Overtemperature Protection
  • CISPR32 Class B Compliant
  • Wide -40°C to +125°C Ambient Operating Temperature Range/-40°C to +150°C Junction Temperature Range

The Himalaya series of voltage regulator ICs, power modules, and chargers enable cooler, smaller, and simpler power supply solutions. The MAX17644 is a high-efficiency, high-voltage, Himalaya synchronous step-down DC-DC converter with integrated MOSFETs operating over an input-voltage range of 4.5V to 36V. The device can deliver up to 2.7A of current. The MAX17644 is available in three variants: MAX17644A, MAX17644B, and MAX17644C. The MAX17644A and MAX17644B are fixed 3.3V and fixed 5V output parts, respectively. The MAX17644C is an adjustable output voltage (from 0.9V up to 90% of V_IN) part. Built-in compensation across the output-voltage range eliminates the need for external compensation components.

The MAX17644 features peak-current mode control architecture. The device can be operated in the forced pulse- width modulation (PWM), or pulse-frequency modulation (PFM), or discontinuous-conduction mode (DCM) to enable high efficiency under full-load and light-load conditions. The MAX17644 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 MAX17644A/MAX17644B/MAX17644C is ±1.2%.The device is available in a 16-pin (3mm x 3mm) 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