LM5161PWPT

Voltage Regulators - DC DC Switching Regulators Overview

The LM5161PWPT is a wide input voltage, 1-A synchronous buck converter from Texas Instruments. It integrates high-side and low-side MOSFETs and operates with an input voltage range of 4.5 V to 100 V. The device delivers a maximum output current of 1 A with a fixed output voltage of 7.3 V. It utilizes a constant on-time control scheme that eliminates the need for external loop compensation. Key electrical parameters include a switching frequency of 1 MHz, a static current of 2.3 mA, and an operating temperature range from -40 °C to +125 °C. The component is housed in an HTSSOP-14 package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates high-side and low-side MOSFETs to eliminate the need for external Schottky diodes
• Constant on-time control architecture provides fast transient response without external loop compensation
• Supports forced continuous conduction mode (CCM) operation via FPWM pin for multi-output Fly-Buck applications
• Features programmable soft-start and peak current limit protection for robust system performance

Voltage Regulators - DC DC Switching Regulators Applications

• Industrial power supplies requiring wide input voltage ranges
• Isolated Fly-Buck converter designs for multi-output systems
• Automotive electronics compliant with AEC-Q100 standards
• Point-of-load regulation in high-voltage distribution networks

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix PWPT corresponds to the tape-and-reel packaging configuration required for your assembly line. Confirm that the Q1 designation indicates automotive qualification if your application demands AEC-Q100 compliance. Ensure the HTSSOP-14 thermal pad requirements are met by your PCB layout to maintain optimal thermal performance within the specified operating temperature range.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a wide input voltage range up to 100 V is required alongside integrated synchronous rectification. The constant on-time topology is suitable for applications demanding rapid transient response without complex compensation network design. Consider the fixed 7.3 V output option if it aligns with your load requirements, or verify if adjustable variants better suit your specific voltage rails.

Voltage Regulators - DC DC Switching Regulators Part Context

The LM5161 belongs to Texas Instruments' family of wide-input synchronous buck converters. It shares architectural similarities with the LM5160 but offers higher input voltage tolerance. The PWPT suffix denotes the specific HTSSOP-14 package variant with tape-and-reel shipping. This part is designed to simplify high-voltage step-down conversion in space-constrained industrial and automotive environments.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

The LM5160A serves as a related alternative with a lower 65-V input rating. Verify compatibility regarding input voltage limits and thermal characteristics when substituting components. Cross-reference pinouts and control schemes to ensure functional equivalence in existing designs.