LM5166DRCR Description

The LM5166DRCR is a 3-V to 65-V ultra-low IQ synchronous buck converter with outstanding efficiency over a wide range of input voltage and load current. Up to 500 mA of output current can be provided using integrated high-side and low-side power MOSFETs at fixed output voltages of 3.3 V or 5 V, or an adjustable output. The converter is intended to make implementation as simple as possible while also giving choices for optimizing performance for the target application. For best light-load efficiency, pulse frequency modulation (PFM) mode is chosen, or constant on-time (COT) control is chosen for a nearly constant operating frequency. Both control techniques provide outstanding line and load transient response and quick PWM on-time for large step-down conversion ratios while requiring no loop correction.

LM5166DRCR Features

? Internally or externally adjustable 900-second soft start

? Ultra-High Light-Load Efficiency with Diode Emulation and Pulse Skipping

? No Bootstrap Components or Loop Compensation

? Enable and input UVLO with hysteresis precision

? Open-Drain Power Indicator Is a Good Indicator

? Hysteresis Thermal Shutdown Protection

LM5166DRCR Applications

? Automated Manufacturing and Buildings

? Battery-powered and automotive applications

? LDO Replacement at High Voltage

? Bias Supplies with Low Power