LMR51420YFDDCR

Voltage Regulators - DC DC Switching Regulators Overview

The LMR51420YFDDCR is a synchronous buck converter from the SIMPLE SWITCHER family, manufactured by Texas Instruments. It operates with an input voltage range of 4.5 V to 36 V and delivers a maximum output current of 2 A. The device supports adjustable output voltages from 600 mV to 36 V. Key electrical parameters include a quiescent current of 40 uA and a fixed switching frequency of 1.1 MHz. It is housed in a SOT-23-THIN-6 package and functions within a junction temperature range of -40°C to +150°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated synchronous rectification for high efficiency in a compact footprint
• Fixed 1.1 MHz switching frequency enables the use of small external components
• Low quiescent current supports efficient power management in standby modes

Voltage Regulators - DC DC Switching Regulators Applications

• Point-of-load regulation for industrial equipment
• Power supply stages for embedded computing systems
• Battery-powered portable devices requiring step-down conversion

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the complete part number including the YFDDCR suffix to ensure correct packaging and tape-and-reel specifications. Confirm that the required operating temperature range aligns with the specified -40°C to +150°C junction limit. Cross-reference the datasheet revision date to ensure compatibility with design requirements. Ensure ESD handling protocols are followed during assembly due to the sensitive semiconductor nature of the component.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a 2 A output current is sufficient for the load application. The fixed 1.1 MHz frequency is optimal for minimizing passive component size compared to lower frequency alternatives. Verify that the input voltage does not exceed the 36 V maximum rating under all transient conditions. Consider the thermal performance of the SOT-23-THIN-6 package relative to the expected power dissipation in the target enclosure.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LMR51420 series of SIMPLE SWITCHER converters. It shares core architecture with variants such as LMR51420YDDCR and LMR51420XFDDCR, differing primarily in packaging or reel specifications. The series is designed for space-constrained applications requiring robust synchronous buck conversion capabilities within a standard SOT-23 form factor.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LMR51420YDDCR

Voltage Regulators - DC DC Switching Regulators FAQ

What is the fixed switching frequency of the LMR51420YFDDCR?

The device operates at a fixed switching frequency of 1.1 MHz.

Does the LMR51420YFDDCR support external synchronization?

No, the LMR51420 series utilizes a fixed internal switching frequency and does not support external clock synchronization.