LM2731YMFX

Voltage Regulators - DC DC Switching Regulators Overview

The LM2731YMFX is a high-efficiency boost converter manufactured by Texas Instruments, housed in a compact SOT-23-5 package. It operates with selectable switching frequencies of 0.6 MHz or 1.6 MHz to optimize external component size and efficiency. The device features an internal 22V FET switch capable of delivering up to 1.5A output current. It supports an input voltage range from 2.7V to 14V and provides an adjustable output voltage from 1.23V to 22V. Key electrical parameters include a quiescent current of 1mA and an operating temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrates a 22V internal FET switch within a minimal five-pin surface-mount footprint.
• Offers selectable switching frequencies to balance between component size and conversion efficiency.
• Includes comprehensive protection mechanisms such as cycle-by-cycle current limiting and thermal shutdown.
• Features a logic-level enable pin for system power management and low-power sleep modes.

Voltage Regulators - DC DC Switching Regulators Applications

• Portable battery-powered devices requiring step-up voltage regulation
• LCD bias voltage generation circuits
• LED backlight driver power supplies
• USB-powered peripheral equipment

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix configuration against the manufacturer's latest datasheet to ensure compatibility with RoHS standards and lead-free requirements. Confirm that the SOT-23-5 package dimensions align with your PCB layout constraints. Cross-reference the part number with official Texas Instruments documentation to validate authenticity and avoid counterfeit components during sourcing.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when board space is limited but higher output voltages are required from a single-cell lithium battery or similar low-voltage source. The choice between 0.6 MHz and 1.6 MHz operation should depend on the available inductor size and desired ripple current. Ensure the load current does not exceed the 1.5A limit and that the input voltage remains within the specified 2.7V to 14V window for stable regulation.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM2731 family of DC-DC converters designed for space-constrained applications. It serves as a cost-effective solution for portable electronics where efficiency and small form factor are critical. The series is widely used in consumer electronics and industrial instrumentation where reliable step-up conversion from low-voltage sources is necessary.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2731YMF/NOPB: Electrically equivalent alternative available in different packaging options.

Voltage Regulators - DC DC Switching Regulators FAQ

How is the switching frequency configured?

The switching frequency can be selected between 0.6 MHz and 1.6 MHz using an external resistor connected to the SYNC/CLK pin.

What protection features are included?

The IC includes cycle-by-cycle current limiting and thermal shutdown protection to safeguard the device under overload or excessive heat conditions.