DESCRIPTION：

The LM5164 synchronous buck converter is designed to regulate over a wide input voltage range, minimizing the need for external surge suppression components. The 50ns minimum controllable on-time 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 LM5164 operates at nearly 100% duty cycle as needed during input voltage transients down to 6V, making it ideal for industrial applications and high-cell-count battery pack applications with wide input supply voltage ranges.

The LM5164 features integrated high-side and low-side power MOSFETs, delivering up to 1A of output current. The Constant On-Time (COT) control architecture provides an almost constant switching frequency with excellent load and line transient response. Additional features of the LM5164 include ultra-low IQ and Diode Emulation Mode operation for high light-load efficiency, excellent peak and valley overcurrent protection, integrated VCC bias 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 LM5164 is available in a thermally-enhanced 8-pin SO PowerPAD™ IC package. The 1.27mm pin spacing provides adequate clearance for high-voltage applications.

FEATURES：

• Designed for Rugged and Reliable Applications

– Wide input voltage range: 6V to 100V

– 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

– Meets CISPR 25 Class 5 standards

• Designed for Scalable Industrial Power and Battery Packs

– Minimum on-time and off-time as low as 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

• Reduced Design Size and Cost Through Integration

– 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 required

– Internal VCC bias regulator and bootstrap diode

– Open-drain power good indicator

– 8-pin SOIC package with PowerPAD™ integrated circuit package

• Create custom regulator designs using LM5164 with WEBENCH® Power Designer

APPLICATIONS：

• Industrial battery packs (≥10S)

• Battery packs – E-bikes, E-scooters, LEVs (Light Electric Vehicles)

• Motor drives, Drones, Communication equipment