LM27313XMFX

Voltage Regulators - DC DC Switching Regulators Overview

The LM27313XMFX is a current-mode boost converter from Texas Instruments, housed in a compact SOT-23-5 package. It operates at a fixed switching frequency of 1.6 MHz and features an integrated 30V DMOS FET switch. The device supports an input voltage range of 2.7 V to 14 V and provides an adjustable output voltage between 4 V and 28 V. It delivers up to 1.25 A of output current with a typical quiescent current of 2.1 mA. The component functions within a temperature range of -40°C to +125°C and includes shutdown capability for power management.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a high-voltage 30V DMOS FET switch within a minimal five-pin surface-mount footprint.
• Utilizes a fixed 1.6 MHz switching frequency to enable the use of small external passive components.
• Incorporates internal compensation networks to simplify circuit design and reduce board space requirements.
• Features logic-level enable control for system power sequencing and low-power shutdown modes.

Voltage Regulators - DC DC Switching Regulators Applications

• Portable electronic devices requiring step-up conversion from single-cell lithium batteries
• LCD bias voltage generation circuits
• LED backlight driver power supplies
• USB-powered peripheral modules
• Industrial sensor systems operating from low-voltage sources

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify that the specific part number matches the required automotive or industrial qualification status, as variants such as the LM27313-Q1 hold AEC-Q100 certification while standard versions do not. Confirm the presence of the NOPB suffix if lead-free compliance is mandatory for the assembly process. Ensure the ordering quantity aligns with the manufacturer's reel specifications to avoid handling discrepancies during production.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when board area is constrained but higher output voltages are necessary from low-input sources. The 1.6 MHz frequency allows for smaller inductors compared to lower-frequency alternatives. Verify that the peak inductor current does not exceed the internal switch limits under maximum load conditions. Consider the thermal performance in the SOT-23 package when designing for continuous high-current operation.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM27313 family of space-efficient DC-DC converters designed for portable applications. It shares architectural similarities with other Texas Instruments boost regulators but distinguishes itself through the integration of a 30V rated switch in a tiny package. The series offers options for both standard commercial and qualified automotive grades depending on the suffix configuration.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

The LM27313XMF/NOPB serves as a functional equivalent with identical electrical characteristics but differs in packaging format. For automotive applications requiring AEC-Q100 Grade 1 certification, the LM27313XQMFX/NOPB is the appropriate substitute. Designers should verify pin compatibility and thermal dissipation capabilities when transitioning between these variants.