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DescriptionThe LM5165 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 fixed output voltages of3.3 V or 5 V or at an adjustable output. The converter is designed to simplify implementation whileproviding options to optimize the performance for the target application. Pulse FrequencyModulation (PFM) mode is selected for optimal light-load efficiency or Constant On-Time (COT)control for nearly constant operating frequency. Both control schemes do not require loopcompensation while providing excellent line and load transient response and short PWM on-time forlarge 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 buck converter is available in a 10-pin, 3-mm × 3-mm, thermally-enhanced VSON-10 packagewith 0.5-mm pin pitch.
All trademarks are the property of their respective owners.
DescriptionThe LM5165 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 fixed output voltages of3.3 V or 5 V or at an adjustable output. The converter is designed to simplify implementation whileproviding options to optimize the performance for the target application. Pulse FrequencyModulation (PFM) mode is selected for optimal light-load efficiency or Constant On-Time (COT)control for nearly constant operating frequency. Both control schemes do not require loopcompensation while providing excellent line and load transient response and short PWM on-time forlarge 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 buck converter is available in a 10-pin, 3-mm × 3-mm, thermally-enhanced VSON-10 packagewith 0.5-mm pin pitch.
Manufacturer: Texas Instruments
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