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

Availability: 358


Package | PIN: HSOIC (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, ambienttemperature range
  • 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 valleycurrent-limit protection
    • Input UVLO and thermal shutdownprotection
  • Suited for scalable automotive power supplies
    • Lowminimum on- and off-times of 50 ns
    • Adjustable switching frequency up to 1MHz
    • Diode emulation for high light-load efficiency
    • 10.5-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 0.725-ΩNFET buck switch supports wide duty cycle range
    • Integrated 0.34-Ω NFETsynchronous rectifier eliminates external Schottky diode
    • 1.2-V 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  LM5164QDDATQ1

The LM5164-Q1 synchronous buck converter isdesigned to regulate over a wide input voltage range, minimizing the need for external surgesuppression components. A minimum controllable on-time of 50 ns facilitates large step-downconversion ratios, enabling the direct step-down from a 48-V nominal input to low-voltage rails forreduced system complexity and solution cost. The LM5164-Q1 operates during input voltage dips as low as 6 V, at nearly 100%duty cycle if needed, making it an excellent choice for high-performance 48-V battery automotive applications and MHEV/EVsystems.

With integrated high-side and low-side power MOSFETs, the LM5164-Q1 delivers up to1-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.