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6-V to 100-V input, 1-A synchronous DC-DC buck converter with ultra-low IQ


Package | PIN: DDA | 8
Temp: S (-40 to 150)
Carrier: Cut Tape
Qty Price
1-9 $4.32
10-24 $3.89
25-99 $3.62
100-249 $3.17
250-499 $2.97
500-749 $2.53
750-999 $2.13
1000+ $2.04


  • AEC-Q100 Qualified for Automotive Applications
    • Device Temperature Grade 1: –40°C to 125°C,Ambient Temperature Range
  • Designed for Reliable and Rugged Applications
    • Wide Input Voltage Range of 6 V to 100 V
    • JunctionTemperature Range: –40°C to 150°C
    • Fixed 3-ms Internal Soft-StartTimer
    • Peak and Valley Current Limit Protection
    • Input UVLOand Thermal Shutdown Protection
  • Suited for Scalable Automotive Power Supplies
    • Low Minimum On- andOff-Times of 50 ns
    • Adjustable Switching Frequency up to 1MHz
    • Diode Emulation for High Light-Load Efficiency
    • 10-µANo-Load Input Quiescent Current
    • 3-µA Shutdown QuiescentCurrent
    • Optimized for CISPR 25 EMIStandard
  • Integration Reduces Solution Size and Cost
    • COT Mode Control Architecture
    • Integrated 0.7-Ω NFETBuck Switch Supports Wide Duty-Cycle Range
    • Integrated 0.3-Ω NFET SynchronousRectifier Eliminates External Schottky Diode
    • 1.2-V ±1% Internal VoltageReference
    • No Loop Compensation Components
    • Internal VCC BiasRegulator and Boot Diode
  • Create a Custom Design Using WEBENCH® Power Designer

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Texas Instruments  PLM5164QDDATQ1

The LM5164-Q1synchronous buck converter is designed to regulate over a wide input voltage range, minimizing theneed for external surge suppression components. A minimum controllable on-time of 50 ns facilitateslarge step-down conversion ratios, enabling the direct step-down from a 48 V nominal input tolow-voltage rails for reduced system complexity and solution cost. The LM5164-Q1 operates during input voltagedips as low as 6 V, at nearly 100% duty cycle if needed, making it an excellent choicefor high-performance 48 V battery automotive applicationsand Mild Hybrid HEV/EV systems.

With integrated high-side and low-side power MOSFETs, the LM5164-Q1 delivers up to 1 A of outputcurrent. A constant on-time (COT) control architecture provides nearly constant switching frequencywith excellent load and line transient response. Additional features of the LM5164-Q1 include ultra-lowIQ 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. Anopen-drain PGOOD indicator provides sequencing, fault reporting, and output voltagemonitoring.

The LM5164-Q1 is qualified to automotive AEC-Q100 grade 1 and isavailable in a 8-pin SO PowerPAD™ package. Its1.27-mm pin pitch provides adequate spacing for high-voltage applications.