LM5165YQDGSRQ1

• AEC-Q100 Qualified for Automotive Applications
  • Device Temperature Grade 1: –40oC to 125oC Ambient TemperatureRange
  • Device HBM ESD Classification Level 2
  • Device CDM ESDClassification Level C5
• Wide Input Voltage Range of 3 V to 65 V
• Fixed(3.3-V, 5-V) or Adjustable Output Voltages
• Maximum Output Current as High as 150 mA
• 10.5-μA No Load Quiescent Current
• –40°C to 150°C JunctionTemperature Range
• Selectable PFM or COT Mode Operation
• Active Slew Rate Controlfor Low EMI
• Integrated 2-Ω PMOS BuckSwitch
  • Supports 100% Duty Cycle for Low Dropout
• Integrated 1-Ω NMOS Synchronous Rectifier
  • Eliminates External RectifierDiode
• Programmable Current Limit Setpoint (4Levels)
• 1.223-V Internal Voltage Reference
• 900-μs Internalor Programmable Soft Start
• Monotonic Start-Up into PrebiasedOutput
• No Loop Compensation or BootstrapComponents
• Precision Enable and Input UVLO With Hysteresis
• Thermal ShutdownProtection With Hysteresis
• 10-Pin VSON and VSSOPPackages
• Create a Custom Regulator Design Using WEBENCH? PowerDesigner

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The LM5165-Q1 device isa compact, easy-to-use, 3-V to 65-V, ultra-low IQ synchronous buck converterwith high efficiency over wide input voltage and load current ranges. With integrated high-side andlow-side power MOSFETs, up to 150-mA of output current can be delivered at either fixed outputvoltages of 3.3 V or 5 V or at an adjustable output. The converter is designed to simplifyimplementation while providing options to optimize the performance for the target application.Pulse Frequency Modulation (PFM) mode is selected for optimal light-load efficiency or ConstantOn-Time (COT) control for nearly constant operating frequency. Both control schemes do not requireloop compensation while providing excellent line and load transient response and short PWM on-timefor large step-down conversion ratios.

The high-side P-channel MOSFET can operate at 100% duty cycle for lowest dropout voltageand does not require a bootstrap capacitor for gate drive. Also, the current limit setpoint isadjustable to optimize inductor selection for a particular output current requirement. Selectableand adjustable start-up timing options include minimum delay (no soft start), internally fixed (900μs), and externally programmable soft start using a capacitor. An open-drain PGOOD indicator can beused for sequencing, fault reporting, and output voltage monitoring. TheLM5165-Q1 is qualified to automotive AEC-Q100 grade 1 and is available in 10-pin VSON and VSSOPpackages with 0.5-mm pin pitch.