1 Features
• 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
– Meets CISPR 25 class 5 standard
• Suited for scalable Industrial power supplies and
battery packs
– 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
– Open-drain power good indicator
– 8-pin SOIC package with PowerPAD™
• Create a custom regulator design using
WEBENCH® power designer

2 Applications
• Industrial battery pack (≥10S)
• Battery pack – e-bike/e-scooter/LEV
• Motor drives, drones, communications equipment

3 Description
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 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
solution cost. The LM5164 operates during input
voltage dips as low as 6V, at nearly 100% duty cycle
if needed, making the device 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 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 include ultra-low IQ 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. The 1.27mm pin
pitch provides adequate spacing for high-voltage
applications.
The LM5164 is available in a thermally-enhanced, 8-
pin SO PowerPAD™ package. The device 1.27mm
pin pitch provides adequate spacing for high-voltage
applications.