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Automotive, 3V-65V, 150mA Synchronous Buck Converter With Ultra-Low IQ


Package | PIN: DGS | 10
Temp: S (0 to 0)
Carrier: Cut Tape
Qty Price
1-9 $3.67
10-24 $3.30
25-99 $3.07
100-249 $2.69
250-499 $2.53
500-749 $2.15
750-999 $1.81
1000+ $1.73


  • 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 Junction Temperature Range
  • Selectable PFM or COT Mode Operation
  • Active Slew Rate Control for Low EMI
  • Integrated 2-Ω PMOS Buck Switch
    • Supports 100% Duty Cycle for Low Dropout
  • Integrated 1-Ω NMOS Synchronous Rectifier
    • Eliminates External RectifierDiode
  • Programmable Current Limit Setpoint (4 Levels)
  • 1.223-V Internal Voltage Reference
  • 900-µs Internal or Programmable Soft Start
  • Monotonic Start-Up into Prebiased Output
  • No Loop Compensation or Bootstrap Components
  • Precision Enable and Input UVLO With Hysteresis
  • Thermal Shutdown Protection With Hysteresis
  • 10-Pin VSON and VSSOP Packages
  • Create a Custom Regulator Design Using WEBENCH® Power Designer

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Texas Instruments  LM5165YQDGSTQ1

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.