LM5161PWPR

Voltage Regulators - DC DC Switching Regulators Overview

The LM5161PWPR 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 supports a maximum output current of 1 A and utilizes a constant on-time control scheme that eliminates the need for external loop compensation. It features a switching frequency of approximately 1 MHz and includes peak current limit protection. The component is housed in a PowerPAD HTSSOP-14 package and is designed for applications requiring fast transient response under high step-down ratios.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates high-side and low-side power switches to eliminate external Schottky diodes
• Constant on-time control architecture enables rapid transient response without external compensation
• Supports forced continuous conduction mode (CCM) for multi-output Fly-Buck applications
• Includes programmable soft-start and adjustable input undervoltage lockout thresholds

Voltage Regulators - DC DC Switching Regulators Applications

• Industrial motor drives and controllers
• Automotive infotainment systems
• Point-of-load regulation for industrial equipment
• Isolated Fly-Buck converter designs

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'PWPR' corresponds to the HTSSOP-14 package and tape-and-reel quantity as defined in the official datasheet. Confirm AEC-Q100 qualification status if automotive compliance is required, noting that standard variants may differ from Q1-rated versions. Ensure compatibility with the intended operating temperature range of -40°C to +125°C during final design validation.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a wide input voltage range up to 100 V is necessary alongside integrated power switches. The constant on-time topology is suitable for designs prioritizing simplicity and fast transient performance over precise frequency locking. Consider the thermal performance of the PowerPAD package for high-current or high-differential-voltage applications where heat dissipation is critical.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM5161 family of wide-input synchronous buck converters. It shares functional similarities with the LMR51610 but offers a higher input voltage capability of 100 V compared to the 65 V limit of the LMR series. The PWPR designation indicates the specific surface-mount packaging and reel configuration used for automated assembly processes.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM5161QPWPTQ1: Automotive-grade variant with identical electrical specifications and pinout.

Voltage Regulators - DC DC Switching Regulators FAQ

Does the LM5161 require external compensation components?

No, the constant on-time control scheme allows for operation without external loop compensation.

Can the LM5161 operate in discontinuous conduction mode?

Yes, it supports DCM operation at light loads or can be forced into CCM via the FPWM pin.