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.