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 LM5164QDDARQ1can 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
