LM5165DRCR Texas Instruments 开关稳压器 3V-65V, 150mA Sync Buck Converter

1 Features

1• Wide Input Voltage Range of 3 V to 65 V

• 10.5-μA No-Load Quiescent Current

• –40°C to 150°C Junction Temperature Range

• Fixed (3.3-V, 5-V) or Adjustable Output Voltages

• Meets EN55022 / CISPR 22 EMI Standards

• 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)

• Selectable PFM or COT Mode Operation

• 1.223-V ±1% Internal Voltage Reference

• 900-μs Internal or Programmable Soft Start

• Active Slew Rate Control for Low EMI

• Diode Emulation Mode and Pulse Skipping for

Ultra-High Light-Load Efficiency Performance

2 Applications

• 4–20 mA Loop-Powered Sensors

• Automotive and Battery-Powered Equipment

• High-Voltage LDO Replacement

• Industrial Control Systems

• General-Purpose Bias Supplies

2 Applications

• 4–20 mA Loop-Powered Sensors

• Automotive and Battery-Powered Equipment

• High-Voltage LDO Replacement

• Industrial Control Systems

• General-Purpose Bias Supplies

2 Applications

• 4–20 mA Loop-Powered Sensors

• Automotive and Battery-Powered Equipment

• High-Voltage LDO Replacement

• Industrial Control Systems

• General-Purpose Bias Supplies

3 Description

The LM5165 device is a compact, easy-to-use, 3-V to

65-V, ultra-low IQ synchronous buck converter with

high efficiency over wide input voltage and load

current ranges. With integrated high-side and lowside

power MOSFETs, up to 150-mA of output

current can be delivered at fixed output voltages of

3.3 V or 5 V or at an adjustable output. The converter

is designed to simplify implementation while providing

options to optimize the performance for the target

application. Pulse Frequency Modulation (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 loop compensation while providing excellent

line and load transient response and short