DESCRIPTION:

The LM5163 synchronous buck converter is designed to regulate over a wide input voltage range, minimizing the need for external surge suppression components. A minimum controllable on-time of 50ns enables large step-down ratios, supporting direct step-down conversion from a 48V nominal input to low voltage rails, thereby reducing system complexity and solution cost. The LM5163 is capable of operating at nearly 100% duty cycle as needed when the input voltage drops to 6V, making it ideal for industrial applications and high-cell-count battery packs with wide input supply voltage ranges. The LM5163 integrates high-side and low-side power MOSFETs and delivers up to 0.5A of output current. Constant-on-time (COT) control architecture provides an almost constant switching frequency with excellent load and line transient response. Additional features of the LM5163 include ultra-low IQ and diode emulation mode operation for high light-load efficiency, innovative peak and valley overcurrent protection, integrated VCC auxiliary supply and bootstrap diode, precision enable and input UVLO, and thermal shutdown protection with automatic recovery. An open-drain PGOOD indicator provides sequencing, fault reporting, and output voltage monitoring. The LM5163 is available in a thermally enhanced 8-pin SO PowerPAD™ package. The 1.27mm pin pitch of this device provides adequate spacing for high-voltage applications.

FEATURES:

• Designed for Reliable and Robust Applications

– Wide 6V to 100V Input Voltage Range

– Junction Temperature Range: –40°C to +150°C

– Fixed 3ms Internal Soft-Start Timer

– Peak and Valley Current Limit Protection

– Input UVLO and Thermal Shutdown Protection

• Optimized for Ultra-Low EMI Requirements

– Compliant with CISPR 25 Class 5

• Suitable for Scalable Industrial Power Supplies and Battery Packs

– Minimum On-Time and Off-Time: 50ns

– Adjustable Switching Frequency up to 1MHz

– Diode Emulation for High Light-Load Efficiency

– 10.5µA No-Load Input Quiescent Current

– 3µA Shutdown Quiescent Current

• Reduces Design Size and Cost with Integrated Technologies

– COT Mode Control Architecture

– Integrated 0.725Ω NFET Buck Switch

– Integrated 0.34Ω NFET Synchronous Rectifier Eliminates External Schottky Diode

– 1.2V Internal Voltage Reference

– No Loop Compensation Components

– Internal VCC Bias Regulator and Bootstrap Diode

– Open-Drain Power Good Indicator

– 8-Pin SOIC Package with PowerPAD™

• Create Custom Regulator Designs Using WEBENCH® Power Designer

APPLICATIONS:

• Industrial Battery Packs (≥10S)

• Battery Packs – E-Bikes/E-Scooters/LEVs