LM2577SX-ADJ/S5001804

Voltage Regulators - DC DC Switching Regulators Overview

The LM2577SX-ADJ/S5001804 is a SIMPLE SWITCHER step-up voltage regulator manufactured by Texas Instruments. It operates with an input voltage range of 3.5V to 40V and provides an adjustable output voltage from 1.23V to 60V. The device supports a maximum switch current of 3A and utilizes a fixed switching frequency of approximately 52kHz. It is housed in a TO-263 (D2PAK-5) surface-mount package and functions as a boost, flyback, or forward converter. The component is rated for operation within a junction temperature range of -40°C to +125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated monolithic power switch capable of delivering up to 3A output current
• Fixed internal switching frequency eliminates the need for external oscillator components
• Built-in thermal shutdown circuitry protects against excessive heat generation
• Adjustable output voltage controlled via external feedback resistor network

Voltage Regulators - DC DC Switching Regulators Applications

• DC-to-DC boost converter circuits
• Flyback power supply designs
• Forward converter topologies
• Negative voltage inversion applications

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix S5001804 against official Texas Instruments documentation to confirm it denotes a standard tape-and-reel packaging format rather than a unique functional variant. Ensure the ordering part number matches the exact pinout and thermal pad configuration required for your PCB layout. Cross-reference the manufacturer's latest datasheet to confirm current production status and availability before finalizing procurement plans.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when designing high-current step-up regulators requiring a robust surface-mount solution. The TO-263 package offers superior thermal dissipation compared to smaller packages, supporting continuous 3A loads. Verify that the chosen inductor can handle the peak switch current without saturating. Ensure the external feedback resistors are selected to set the desired output voltage within the specified 1.23V to 60V range while maintaining stability.

Voltage Regulators - DC DC Switching Regulators Part Context

This device belongs to the LM2577 family of SIMPLE SWITCHER regulators, which are designed for ease of use in non-isolated DC-DC conversion. The 'SX' designation indicates the surface-mount TO-263 package variant. As an adjustable version, it offers flexibility in output voltage setting, distinguishing it from fixed-voltage counterparts like the LM2577-5.0 or LM2577-12 within the same product line.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2577SX-ADJ/NOPB is a parameter-equivalent alternative from Texas Instruments. Verify compatibility regarding RoHS compliance and lead-free manufacturing processes. Ensure the replacement maintains the same TO-263 footprint and electrical characteristics for direct substitution in existing designs.