LM5163DDAR

The LM5163 synchronous buck converter is used for regulation over a wide input voltage range, thereby minimizing the need for external surge suppression components. The minimum controllable on-time of 50 ns helps achieve a large step-down ratio, supporting direct step-down conversion from a nominal 48V input to a low-voltage rail, thus reducing system complexity and solution cost. The LM5163 can continue to operate at a duty cycle close to 100% as needed when the input voltage suddenly drops to 6V, making it an ideal choice for industrial applications with a wide input power supply range and battery pack applications with a high number of battery cells. The LM5163 features integrated high-side and low-side power MOSFETs, capable of providing an output current of up to 0.5A. The constant on-time (COT) control architecture provides an almost constant switching frequency with excellent load and line transient response. Other features include ultra-low IQ and diode emulation mode operation (for high light-load efficiency), innovative peak and valley overcurrent protection, an integrated VCC bias supply and bootstrap diode, precision enable and input UVLO, and thermal shutdown protection with automatic recovery. The open-drain PGOOD indicator provides sequencing, fault reporting, and output voltage monitoring functions. The LM5163 is available in a thermally enhanced 8-pin SO PowerPAD package. Its 1.27mm lead pitch enables implementation in high-voltage applications.

Applications

• Industrial battery packs (≥10S)
• Battery packs – e-bikes/e-scooters/LEVs
• Motor drivers
• Communication equipment

Key features

• Designed for reliable and durable 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
• 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
• Ultra-low EMI radiation
• Optimized for CISPR 25 Class 5
• Reduced solution size and cost via integrated design
• COT mode control architecture
• Integrated 0.725Ω NFET buck switch
• Integrated 0.34Ω NFET synchronous rectifier, eliminating 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 with WEBENCH Power Designer