The LM5169 and LM5168 synchronous buck converters are 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 LM516x 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 LM5169 delivers up to
0.65A of output current and the LM5168
delivers up to 0.3A of output current. A constant on-time (COT) control architecture
provides nearly constant switching frequency with excellent load and line transient
response. The LM516x is available in FPWM
or auto mode versions. FPWM mode provides forced CCM operation across the entire
load range supporting isolated Fly-Buck converter applications. Auto mode enables
ultra-low IQ and diode emulation mode operation for high light-load
efficiency.
The LM5169 and LM5168 synchronous buck converters are 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 LM516x 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 LM5169 delivers up to
0.65A of output current and the LM5168
delivers up to 0.3A of output current. A constant on-time (COT) control architecture
provides nearly constant switching frequency with excellent load and line transient
response. The LM516x is available in FPWM
or auto mode versions. FPWM mode provides forced CCM operation across the entire
load range supporting isolated Fly-Buck converter applications. Auto mode enables
ultra-low IQ and diode emulation mode operation for high light-load
efficiency.