Analog Devices MAX17551 Product Info

• Reduces External Components and Total Cost
  • No Schottky–Synchronous
  • Internal Compensation for Any Output Voltage
  • Built-In Soft-Start
  • All-ceramic capacitors, Compact Layout
• Reduces Number of DC-DC Regulators to Stock
  • Wide 4V to 60V Input
  • Adjustable 0.8V to 0.9 x V_IN Output
  • 100kHz to 2.2MHz Adjustable Switching Frequency with External Synchronization
• Reduces Power Dissipation
  • 22µA Quiescent Current
  • Peak Efficiency > 90%
  • PFM Enables Enhanced Light-Load Efficiency
  • 1.2µA Shutdown Current
• Operates Reliable in Adverse Environments
  • Peak Current Limit Protection
  • Built-In Output Voltage Monitoring Active-Low RESET
  • Programmable EN/UVLO Threshold
  • Monotonic Startup in to Prebiased Load
  • Overtemperature Protection
  • Overtemperature Protection • High Industrial -40°C to +125°C Ambient Operating Temperature Range / -40°C to +150°C Junction Temperature Range

The MAX17551 high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operates over a 4V to 60V input. The converter can deliver up to 50mA and generates output voltages from 0.8V up to 0.9 x V_IN. The feedback (FB) voltage is accurate to within ±1.75% over -40°C to +125°C.

The MAX17551 uses peak-current-mode control and can be operated in pulse-width modulation (PWM) or pulse-frequency modulation (PFM) modes.

The device is available in a 10-pin (3mm x 2mm) TDFN and 10-pin (5mm x 3mm) µMAX^® packages. Simulation models are available.

Applications

• Battery-Powered Equipment
• High-Voltage LDO Replacement
• HVAC and Building Control
• Industrial Sensors and Process Control