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The LM5168FDDAR synchronous buck converter is designed to regulate over a wide input voltage range to minimise the need for external surge suppression components. 50ns minimum controllable on-time facilitates a large step-down conversion ratio and supports direct step-down conversions from a nominal 48V input to a low voltage rail, reducing system complexity and solution cost. The LM516x is capable of operating at nearly 100% duty cycle as needed during input voltage dips down to 6V, making it ideal for industrial and high-cell-count battery pack applications with a wide input supply voltage range.

LM5168 Features

Designed for reliability in demanding applications

Wide input voltage range of 6V to 120V

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

Suitable for scalable industrial power supplies and battery packs

Minimum on-time and off-time as low as 50ns

Adjustable switching frequency up to 1MHz

Diode emulation for high light load efficiency

Low quiescent current (< 10µA) in auto mode

FPWM mode supports Fly-Buck converter function

3µA shutdown quiescent current

Pin-to-pin compatible with LM5164, LM5163, LM5017 and LM34927

Reduced solution size and cost through integrated technology

COT mode control architecture

Integrated 1.9Ω NFET Buck Switch

Integrated 0.71Ω NFET Synchronous Rectifier

1.2V internal voltage reference

Loop-free compensation components

Internal VCC bias regulator and bootstrap diode

Open-drain power normal state indicator

SOIC PowerPAD™ Integrated Circuit Package

LM5168FDDAR Product Attributes

Function: Buck, Boost/Buck  

Output Configuration: Positive  

Topology: Buck, Flyback  

Output Type: Adjustable  

Number of Outputs: 1  

Voltage - Input (Min): 6V  

Voltage - Input (Max): 120V  

Voltage - Output (Min/Fixed): 1.2V  

Voltage - Output (Max): 120V  

Current - Output: 300mA  

Frequency - Switching: 100kHz ~ 1MHz  

Synchronous Rectifier: Yes  

Operating Temperature: -40°C ~ 150°C (TJ)  

Mounting Type: Surface Mount 

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