LM5164QDDARQ1 Description

  The LM5164QDDARQ1 synchronous step-down converter is designed to adjust over a wide range of input voltages to minimize the need for external operation suppression components. A minimum controllable opening time of 50 ns helps to achieve a large step-down conversion ratio, resulting in a direct step-down from 48 V rated input to low-voltage tracks, thereby reducing system complexity and solution costs. If required, the  LM5164QDDARQ1 can operate at a duty cycle of nearly 100% at an input voltage drop as low as 6V, making it the best choice for high-performance 48V battery automotive applications and MHEV/EV systems.

LM5164QDDARQ1 Features 

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

LM5164QDDARQ1 Application

 automotive AEC-Q100 grade 1

high-voltage applications