LM5164QDDARQ1

Voltage Regulators - DC DC Switching Regulators Overview

The LM5164QDDARQ1 is an automotive-grade synchronous buck DC/DC converter from Texas Instruments. It supports a wide input voltage range of 6 V to 100 V and delivers up to 1 A of output current. The device features ultra-low quiescent current, a minimum controllable on-time of 50 ns for high step-down ratios, and operates at a switching frequency of 1 MHz. It utilizes a constant on-time control architecture with integrated high-side and low-side power MOSFETs in an 8-SO PowerPAD package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated high-side and low-side power MOSFETs provide up to 1 A output current capability.
• Constant on-time control architecture ensures stable switching frequency and fast transient response.
• Ultra-low IQ minimizes system-level current consumption during standby modes.
• Diode emulation mode operation enhances efficiency under light load conditions.

Voltage Regulators - DC DC Switching Regulators Applications

• Wide input voltage industrial applications
• High cell count battery packs
• Automotive systems requiring robust voltage regulation

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'Q' indicates automotive qualification (AEC-Q100) and 'R' denotes tape and reel packaging. Confirm the operating temperature range aligns with your design requirements, typically -40°C to +150°C junction temperature. Ensure compatibility with your PCB footprint for the 8-SO PowerPAD package.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when designing systems with input voltages up to 100 V that require efficient step-down conversion. It is suitable for applications needing minimal external surge suppression components due to its wide input range. Consider the 50 ns minimum on-time if direct conversion from 48 V nominal inputs to lower voltage rails is required.

Voltage Regulators - DC DC Switching Regulators Part Context

The LM5164QDDARQ1 belongs to the LM5164 family of synchronous buck converters designed for high-voltage applications. It shares architectural similarities with the non-automotive LM5164DDAR but includes automotive-specific reliability qualifications. This part serves as a bridge between standard industrial regulators and ruggedized automotive power management solutions.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

• LM5164DDAR

Voltage Regulators - DC DC Switching Regulators FAQ

What is the minimum controllable on-time of the LM5164QDDARQ1?

The device features a minimum controllable on-time of 50 ns, which facilitates large step-down ratios.

Does the LM5164QDDARQ1 support operation at low input voltages?

Yes, it can operate with input voltages down to 6 V and maintains functionality near 100% duty cycle during input sags.