LM5168FDDAR

Voltage Regulators - DC DC Switching Regulators Overview

The LM5168FDDAR is a synchronous buck DC-DC converter from Texas Instruments, housed in an 8-SOIC PowerPAD package. It supports a wide input voltage range of 6 V to 120 V and delivers up to 650 mA output current with adjustable output voltages from 1.2 V to 90 V. The device features a fixed 1 MHz switching frequency, ultra-low quiescent current of 10 µA in auto mode, and operates across a junction temperature range of -40°C to +150°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated high-side and low-side power MOSFETs for compact design
• Constant on-time control architecture for fast transient response
• Diode emulation mode for enhanced light-load efficiency
• Built-in thermal shutdown and overcurrent protection

Voltage Regulators - DC DC Switching Regulators Applications

• Industrial battery packs with ten or more cells
• Communication brick-style power modules
• Wide input voltage industrial applications

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'FDDAR' against the manufacturer's official datasheet to confirm the SOIC-8 PowerPAD package and lead-free status. Ensure the ordering part number matches the required tape-and-reel quantity. Cross-reference the RoHS compliance details directly with the component documentation before finalizing procurement orders.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a wide input voltage range up to 120 V is required alongside moderate output current capabilities. The integrated MOSFETs simplify the bill of materials by eliminating external switching components. Consider the fixed 1 MHz frequency for balancing efficiency and component size in space-constrained designs.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM516x family of synchronous buck converters designed for high-voltage applications. It shares functional similarities with the LM5169 but differs in output current ratings and packaging options. The device is engineered for reliability in harsh environments, supporting high junction temperatures and robust protection mechanisms.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

The LM5168FNGUR offers identical electrical performance but utilizes a WSON-8 package instead of the SOIC-8 PowerPAD. Verify footprint compatibility and thermal dissipation requirements when substituting between these package types.

Voltage Regulators - DC DC Switching Regulators FAQ

Does the LM5168FDDAR support flyback conversion?

Yes, the device supports Fly-Buck converter functionality when operated in Fixed Frequency Pulse Width Modulation (FPWM) mode.

What is the minimum controllable on-time of the LM5168FDDAR?

The device features a minimum controllable on-time of 50 ns, enabling high step-down ratios from nominal 48 V inputs.