LM2577N-ADJ/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2577N-ADJ/NOPB is a SIMPLE SWITCHER step-up voltage regulator from Texas Instruments, housed in an 8-pin MDIP package. It supports input voltages up to 40V and delivers adjustable output voltages ranging from 1.23V to 37V with a maximum output current of 1A. The device operates at a fixed switching frequency of 52kHz, ensuring efficient power conversion. Designed for robust performance, it functions within a temperature range of -40°C to +125°C and includes built-in thermal shutdown and current limiting features for reliable operation in various DC-DC applications.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated step-up topology simplifies design by combining controller, switch, and freewheeling diode
• Fixed 52kHz switching frequency allows use of small passive components
• Built-in thermal shutdown and current limit protection enhance system reliability

Voltage Regulators - DC DC Switching Regulators Applications

• Battery-powered systems requiring voltage boost
• General-purpose DC-DC conversion circuits
• Industrial control power supplies

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the complete part number including suffixes such as NOPB for lead-free status against official Texas Instruments documentation. Confirm package type matches requirements, as variants exist in TO-263 and other formats. Ensure sourcing channels provide genuine components with traceable manufacturing dates to avoid counterfeit risks associated with legacy PMIC families.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a high-voltage input step-up solution is needed with through-hole mounting preferences. Compare against LM2577SX series if surface-mount space constraints apply. Consider the 1A current limit for load requirements; higher current needs may require the LM2576 family or parallel configurations. Validate input voltage ranges against specific application sources to ensure compatibility with the 40V maximum rating.

Voltage Regulators - DC DC Switching Regulators Part Context

This regulator belongs to the SIMPLE SWITCHER family, known for integrated power switches and simplified external component requirements. The LM2577 specifically addresses boost converter topologies, contrasting with the LM2575/LM2576 buck converters. The N-package denotes a multi-dip industrial variant, distinct from the SMD SX-series, offering different thermal and mechanical integration characteristics for PCB layout strategies.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LM2577N-ADJ is the direct equivalent without the NOPB suffix. LM2577SX-ADJ offers identical electrical performance in a surface-mount TO-263 package. LM1577 provides military-grade temperature range options with similar functionality.