LM73605QRNPRQ1

The LM73605-Q1/LM73606-Q1 family of devices are easy-to-use synchronous step-down DC-DC converters capable of driving up to 5 A (LM73605-Q1) or 6 A (LM73606-Q1) of load current from a supply voltage ranging from 3.5 V to 36 V. The LM73605-Q1/LM73606-Q1 provide exceptional efficiency and output accuracy in a very small solution size. Peak current-mode control is employed. Additional features such as adjustable switching frequency, synchronization 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-Q1 and LM73606-Q1 devices are pinto-pin compatible for easy current scaling.

Applications

• Automotive Distributed Power Applications
• Battery-Powered Applications
• General-Purpose Wide VIN Applications

Key features

• AEC-Q100 Qualified for Automotive Applications
• Device Temperature Grade 1: -40°C to +125°C Ambient Operating Temperature
• Device HBM ESD Classification Level 2k V
• Device CDM ESD Classification Level C5
• Wettable Flanks QFN Package (WQFN)
• Low EMI and Low Switching Noise
• Low Quiescent Current 0.8 μA in Shutdown (typical)
• 15 μA in Active Mode With No Load (typical)
• Wide Voltage Conversion Range:
• tON-MIN = 60 ns (typical)
• tOFF-MIN = 70 ns (typical)
• Low MOSFET ON-Resistance:
• RDS_ON_HS = 53 mΩ (typical)
• RDS_ON_LS = 31 mΩ (typical)
• Adjustable Frequency Range: 350 kHz to 2.2 MHz
• Pin-Selectable Auto Mode or Forced PWM Mode
• Start-up into Pre-Biased Load, Fixed or Adjustable Soft-Start Time, and Tracking
• Synchronizable to External Clock, Internal Compensation, Power-Good Flag, and Precision Enable
• Cycle-by-Cycle Current Limiting, Hiccup, UVLO, and Thermal Shutdown Protections
• Create a Custom Design With the WEBENCH Power Designer using LM73605-Q1 or LM73606-Q1