LM5164

• Designed for reliable and rugged applications
  • Wide input voltage range of 6 V to 100 V
  • Junction temperature range: –40°C to +150°C
  • Fixed 3-ms internal soft-start timer
  • Peak and valley current-limit protection
  • Input UVLO and thermal shutdown protection
• Suited for scalable Industrial power supplies and battery packs
  • Low minimum on- and off-times of 50 ns
  • Adjustable switching frequency up to 1 MHz
  • Diode emulation for high light-load efficiency
  • 10.5-µA no-load input quiescent current
  • 3-µA shutdown quiescent current
  • Optimized for CISPR 32 EMI standard
• Integration reduces solution size and cost
  • COT mode control architecture
  • Integrated 0.725-Ω NFET buck switch supports wide duty-cycle range
  • Integrated 0.34-Ω NFET synchronous rectifier eliminates external Schottky diode
  • 1.2-V internal voltage reference
  • No loop compensation components
  • Internal VCC bias regulator and boot diode
  • Open-drain power good indicator
  • 8-Pin SOIC package with PowerPAD™
• Create a custom design using WEBENCH^® power designer

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The LM5164 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 50 ns facilitates large step-down conversion ratios, enabling the direct step-down from a 48-V nominal input to low-voltage rails for reduced system complexity and solution cost. The LM5164 operates during input voltage dips as low as 6 V, at nearly 100% duty cycle if needed, making it an excellent choice for wide input supply range industrial and high cell count battery pack applications.

With integrated high-side and low-side power MOSFETs, the LM5164 delivers up to 1-A of output current. A constant on-time (COT) control architecture provides nearly constant switching frequency with excellent load and line transient response. Additional features of the LM5164 include ultra-low I_Q and diode emulation mode operation for high light-load efficiency, innovative 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™ package. Its 1.27-mm pin pitch provides adequate spacing for high-voltage applications.