Texas Instruments LM5165-Q1

Description

The LM5165-Q1 is a compact, easy-to-use, 3-V to65-V, ultra-low IQ synchronous buck converter withhigh efficiency over wide input voltage and loadcurrent ranges. With integrated high-side and lowsidepower MOSFETs, up to 150-mA of outputcurrent can be delivered at fixed output voltages of3.3 V or 5 V, or an adjustable output. The converter isdesigned to simplify implementation while providingoptions to optimize the performance the targetapplication. Pulse Frequency Modulation (PFM) modeis selected for optimal light-load efficiency orConstant On-Time (COT) control for nearly constantoperating frequency. Both control schemes do notrequire loop compensation while providing excellentline and load transient response and short PWM ontimefor large step-down conversion ratios.The high-side p-channel MOSFET can operate at100% duty cycle for lowest dropout voltage and doesnot require a bootstrap capacitor for gate drive. Also,the current limit setpoint is adjustable to optimizeinductor selection for a particular output currentrequirement. Selectable/adjustable startup timingoptions include minimum delay (no soft start),internally fixed (900 μs), and externally programmablesoft start via an external capacitor. An open-drainPGOOD indicator can be used for sequencing andoutput voltage monitoring. The LM5165-Q1 isqualified to automotive AEC-Q100 grade 1 and isavailable in a VSON-10 package with 0.5-mm pinpitch.

Features

1- Qualified for Automotive Applications

• AEC-Q100 Qualified with the Following Results:– Device Temperature Grade 1: –40ºC to 125ºCAmbient Temperature Range– Device HBM ESD Classification Level 2– Device CDM ESD Classification 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
• Switching Frequency as High as 600 kHz
• Integrated 2-Ω PMOS Buck Switch– Supports 100% Duty Cycle for Low Dropout
• Integrated 1-Ω NMOS Synchronous Rectifier– Eliminates External Rectifier Diode
• Programmable Current Limit Setpoint (4 Levels)
• 900-μs Internal or Programmable Soft Start
• Monotonic Startup into Pre-Biased Output
• No Loop Compensation or Bootstrap Components
• Precision Enable/Input UVLO with Hysteresis
• Open-Drain Power Good Indicator
• Active Slew Rate Control for Low EMI
• Thermal Shutdown Protection with Hysteresis
• 10-Lead, 3-mm x 3-mm VSON Package

Typical applications

• Automotive and Battery-powered Equipment
• High-voltage LDO Replacement
• General Purpose Bias Supplies

More information

• Datasheet
• IC product information