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.
| 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 | Dec 3, 2025 |
| Certificate | LM5164-Q1EVM-041 EU RoHS Declaration of Conformity (DoC) (Rev. B) | Mar 3, 2021 | ||
| Functional safety information | LM5164-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA (Rev. A) | PDF | HTML | Jan 8, 2021 | |
| Functional safety information | Streamlining Functional Safety Certification in Automotive and Industrial | Jun 9, 2020 | ||
| Application note | Stability Analysis and Design of COT Type-3 Ripple Circuit | Mar 20, 2019 | ||
| Application note | DC/DC Buck Converters With Ultra-Low IQ for Industrial Battery-Pack Applications | Feb 20, 2019 | ||
| Application brief | IC Package Features Lead to Higher Reliability in Automotive Systems | Feb 20, 2019 | ||
| Technical article | Searching for the newest innovations in power? Find them at APEC | PDF | HTML | Feb 9, 2019 |
For additional terms or required resources, click any title below to view the detail page where available.
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| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| HSOIC (DDA) | 8 | Ultra Librarian |
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