3.5V to 36V, 5A synchronous step-down voltage converter

Additional features such as adjustable switching frequency, synchronisation to an external clock, FPWM option, power-good flag, precision enable, adjustable soft start, and tracking provide both flexible and easy-to-use solutions for a wide range of applications.

Automatic frequency foldback at light load and optional external bias improve efficiency over the entire load range. The family requires few external components and has a pinout designed for simple PCB layout with optimal EMI and thermal performance.

Protection features include thermal shutdown, input undervoltage lockout, cycle-by-cycle current limiting, and hiccup short-circuit protection. The LM73605 and LM73606 devices are pin-to-pin compatible for easy current scaling.

Features

• Synchronous Rectification
• Wettable Flanks QFN Package (WQFN)
• Low Quiescent Current
• 0.8µA in Shutdown (typical)
• 15µA in Active Mode with No Load (typical)
• Wide Voltage Conversion Range:
• tON_MIN = 60ns (typical)
• tOFF_MIN = 70ns (typical)
• Low MOSFET ON-Resistance:
• RDS_ON_HS = 53mΩ (typical)
• RDS_ON_LS = 31mΩ (typical)
• External Bias Input to Improve Efficiency
• Pin-Selectable Auto Mode or Forced PWM Operation
• Adjustable Frequency Range: 350kHz to 2.2MHz
• Synchronisable to External Clock
• Internal Compensation
• Power-Good Flag
• Precision Enable to Program System UVLO
• Flexible Soft-Start Features:
• Start-up into Pre-Biased Load
• Fixed or Adjustable Soft-Start Time
• Output Voltage Tracking
• Cycle-by-Cycle Current Limiting
• Short-Circuit Protection With Hiccup Mode
• Thermal Shutdown Protection
• Create a Custom Design With the WEBENCH Power Designer using LM73605 or LM73606

Discover more here.