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LM5164-Q1

ACTIVE

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

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Data sheet

LM5164-Q1

ACTIVE
Data sheet Order now

Product details

Rating Automotive Topology Buck Iout (max) (A) 1 Vin (max) (V) 100 Vin (min) (V) 6 Vout (max) (V) 90 Vout (min) (V) 1.2 Features Enable, Light Load Efficiency, Over Current Protection, Power good, Pre-Bias Start-Up, Soft Start Fixed, Synchronous Rectification, UVLO adjustable Control mode Constant on-time (COT) Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.00001 Duty cycle (max) (%) 99 TI functional safety category Functional Safety-Capable
Rating Automotive Topology Buck Iout (max) (A) 1 Vin (max) (V) 100 Vin (min) (V) 6 Vout (max) (V) 90 Vout (min) (V) 1.2 Features Enable, Light Load Efficiency, Over Current Protection, Power good, Pre-Bias Start-Up, Soft Start Fixed, Synchronous Rectification, UVLO adjustable Control mode Constant on-time (COT) Operating temperature range (°C) -40 to 150 Iq (typ) (A) 0.00001 Duty cycle (max) (%) 99 TI functional safety category Functional Safety-Capable
HSOIC (DDA) 8 29.4 mm² 4.9 x 6
  • 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 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
  • Designed for scalable automotive power supplies
    • Low minimum on- and off-times of 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
  • Integration reduces design size and cost
    • 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
    • Internal VCC bias regulator and boot diode
  • Create a custom regulator design using the LM5164-Q1 with WEBENCH Power Designer
  • 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 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
  • Designed for scalable automotive power supplies
    • Low minimum on- and off-times of 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
  • Integration reduces design size and cost
    • 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
    • Internal VCC bias regulator and boot diode
  • Create a custom regulator design using the LM5164-Q1 with WEBENCH Power Designer

The LM5164-Q1 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 50ns facilitates large step-down conversion ratios, enabling the direct step-down from a 48V nominal input to low-voltage rails for reduced system complexity and design cost. The LM5164-Q1 operates during input voltage dips as low as 6V, at nearly 100% duty cycle if needed, making the device an excellent choice for high-performance 48V battery automotive applications and MHEV/EV systems.

With integrated high-side and low-side power MOSFETs, the LM5164-Q1 delivers up to 1A 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-Q1 include ultra-low IQ and diode emulation mode operation for high light-load efficiency, remarkable 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-Q1 is qualified to automotive AEC-Q100 grade 1 and is available in a 8-pin SO PowerPAD™ integrated circuit package. The device 1.27mm pin pitch provides adequate spacing for high-voltage applications.

The LM5164-Q1 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 50ns facilitates large step-down conversion ratios, enabling the direct step-down from a 48V nominal input to low-voltage rails for reduced system complexity and design cost. The LM5164-Q1 operates during input voltage dips as low as 6V, at nearly 100% duty cycle if needed, making the device an excellent choice for high-performance 48V battery automotive applications and MHEV/EV systems.

With integrated high-side and low-side power MOSFETs, the LM5164-Q1 delivers up to 1A 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-Q1 include ultra-low IQ and diode emulation mode operation for high light-load efficiency, remarkable 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-Q1 is qualified to automotive AEC-Q100 grade 1 and is available in a 8-pin SO PowerPAD™ integrated circuit package. The device 1.27mm pin pitch provides adequate spacing for high-voltage applications.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet LM5164-Q1 100V Input, 1A Synchronous Buck DC/DC Converter With Ultra-low IQ datasheet (Rev. C) PDF | HTML 03 Dec 2025
Certificate LM5164-Q1EVM-041 EU RoHS Declaration of Conformity (DoC) (Rev. B) 03 Mar 2021
Functional safety information LM5164-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA (Rev. A) PDF | HTML 08 Jan 2021
Functional safety information Streamlining Functional Safety Certification in Automotive and Industrial 09 Jun 2020
White paper 簡化汽車及工業領域的功 能安全認證 09 Jun 2020
White paper 자동차 및 산업 분야의 기능적 안전성 인증 간소화 09 Jun 2020
Application note Stability Analysis and Design of COT Type-3 Ripple Circuit 20 Mar 2019
Application note DC/DC Buck Converters With Ultra-Low IQ for Industrial Battery-Pack Applications 20 Feb 2019
Application brief IC Package Features Lead to Higher Reliability in Automotive Systems 20 Feb 2019
Technical article Searching for the newest innovations in power? Find them at APEC PDF | HTML 09 Feb 2019

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

LM5164-Q1EVM — Synchronous step-down converter evaluation module

The LM5164-Q1 evaluation module (EVM) is a fully assembled and tested circuit for evaluating the LM5164-Q1, 300-kHz synchronous step-down converter.  The LM5164-Q1EVM operates at very low quiescent current and delivers exceptional efficiency with minimum number of external components.
User guide: PDF
Not available on TI.com
Evaluation board

PLC010935BP — PLC010935BP BoosterPack™ plug-in module for solar power line communication reference design

The PLC010935BP booster pack™ plug-in module is the orderable version of the TIDA-010935 reference design.  This booster pack plug-in module pairs with the MSPM0G3507 LaunchPad™ development kit for 80-MHz Arm® Cortex®-M0+ MCU to enable powerline communication (PLC) using the UART to PLC THVD8000 (...)

Not available on TI.com
Simulation model

LM5164-Q1 PSpice Transient Model

SNVMBO8.ZIP (116 KB) - PSpice Model
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Simulation model

LM5164-Q1 TINA-TI Spice Transient Model

SNVMBV5.TSC (629 KB) - TINA-TI Spice Model
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Simulation model

LM5164-Q1 Unencrypted PSpice Transient Model

SNVMBP2.ZIP (5 KB) - PSpice Model
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Calculation tool

LM5163-LM5164DESIGN-CALC — LM5163 and LM5164 converter quickstart design tool

Welcome to the LM5163 and LM5164 Quickstart Design Tool. This standalone tool facilitates and assists the power supply engineer with design of a DC/DC buck converter based on the LM5163 and LM5164 low IQ synchronous buck DC/DC regulator. As such, the user can expeditiously arrive at an optimized (...)
User guide: PDF
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Design tool

DRV3255-Q1-DATA-SHEET — DRV3255-Q1 full data sheet

Supported products & hardware

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Design tool

DRV3255-Q1-EVM-DESIGN — DRV3255-Q1 evaluation module restriction

Supported products & hardware

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Design tool

DRV3255-Q1-SAFETY-DOCS — DRV3255-Q1 safety documentation

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HSOIC (DDA) 8 Ultra Librarian
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