Texas Instruments LM5166

Description

The LM5166 is a compact, easy-to-use, 3-V to 65-V,ultra-low IQ synchronous buck converter with highefficiency over wide input voltage and load currentranges. With integrated high-side and low-side powerMOSFETs, up to 500 mA of output current can bedelivered at fixed output voltages of 3.3 V or 5 V, oran adjustable output. The converter is designed tosimplify implementation while providing options tooptimize the performance for the target application.Pulse Frequency Modulation (PFM) mode is selectedfor optimal light-load efficiency or Constant On-Time(COT) control for nearly constant operatingfrequency. Both control schemes do not require loopcompensation while providing excellent line and loadtransient response and short PWM on-time for largestep-down conversion ratios

Features

Wide Input Voltage Range of 3 V to 65 V

• 9.7-μA No-Load Quiescent Current
• –40°C to 150°C Junction Temperature Range
• Fixed (3.3-V, 5-V) or Adjustable VOUT Options
• Meets EN55022 / CISPR 22 EMI Standards
• Integrated 1-Ω PFET Buck Switch– Supports 100% Duty Cycle for Low Dropout
• Integrated 0.5-Ω NFET Synchronous Rectifier– Eliminates External Schottky Diode
• Programmable Peak Current Limit Supports:– 500-mA, 300-mA, or 200-mA Loads
• Selectable PFM or COT Mode Operation
• 1.223-V ±1.2% Internal Voltage Reference
• Switching Frequency up to 600 kHz
• 900-μs Internal or Externally-Adjustable Soft Start
• Diode Emulation and Pulse Skipping for Ultra-High Light-Load Efficiency
• No Loop Compensation or Bootstrap Components
• Precision Enable and Input UVLO With Hysteresis
• Open-Drain Power Good Indicator
• Thermal Shutdown Protection With Hysteresis
• Pin-to-Pin Compatible With the LM5165
• 10-Pin, 3-mm × 3-mm VSON Package
• Create a Custom Regulator Design Using

Typical applications

• Automotive
• High Voltage LDO Replacement,Low Power Bias Supplies
• Factory and Building Automation
• Battery-powered Applications

More information

• Datasheet
• IC product information