LM5166YDRCR

Voltage Regulators - DC DC Switching Regulators Overview

The LM5166YDRCR is a synchronous buck converter from Texas Instruments, housed in a 10-VSON package. It supports an input voltage range of 3 V to 65 V and delivers up to 500 mA output current. The fixed-output variant provides 3.3 V with setpoint accuracy better than 2%. Key electrical parameters include a quiescent current of 9.7 µA, operating supply current of 320 µA, and a switching frequency of 600 kHz. It operates within a temperature range of -40°C to +150°C TJ.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates high-side and low-side MOSFETs for efficient synchronous rectification.
• Utilizes constant-on-time control architecture with diode emulation for ultra-low no-load current.
• Maintains 100% duty cycle conduction when input voltage drops below the output setpoint.

Voltage Regulators - DC DC Switching Regulators Applications

• Industrial automation systems
• Connected sensor networks
• Building automation infrastructure

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'Y' confirms the fixed 3.3 V output configuration against the datasheet. Ensure the 'DRCR' designation matches the required 10-VSON surface-mount package and reel quantity. Confirm RoHS compliance status and manufacturing origin prior to finalizing procurement orders.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component for applications requiring wide input voltage tolerance up to 65 V. It is suitable where minimal no-load power consumption is critical due to its ultra-low IQ profile. Consider the 500 mA current limit and thermal performance in the small VSON footprint for system design constraints.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM5166 family of wide-input synchronous buck converters. It shares architectural similarities with the LM5165 but offers higher output current capability. The YDRCR variant specifically denotes the fixed 3.3 V output version within the broader product line.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM5166DRCR (Adjustable Output Version)

Voltage Regulators - DC DC Switching Regulators FAQ

How does the LM5166 handle low dropout conditions?

It maintains 100% duty cycle conduction of the high-side MOSFET when the input voltage decreases below the output voltage setpoint.

What control scheme does the LM5166 utilize?

The device employs a constant-on-time (COT) control scheme combined with diode emulation to achieve high efficiency and low no-load current.