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LM2577T-ADJ/NOPB

TILM2577T-ADJ/NOPB

Texas Instruments
Adjustable boost regulator option for higher-power boost applications
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Overview

The LM2577T-ADJ/NOPB is an adjustable switching regulator designed for step-up (boost) and flyback converter topologies. It integrates a 3A NPN output switch capable of standing off 65V. This device operates at a fixed 52kHz switching frequency and features current-mode control for improved dynamic response.

Why Choose This Part

This regulator requires few external components, simplifying board design and reducing bill of materials cost. Its current-mode operation provides excellent transient response and line regulation, crucial for stable power delivery. Built-in protection features like current limit, undervoltage lockout, and thermal shutdown enhance system reliability and robustness.

Applications

Boost Voltage Converters
Ideal for applications requiring a higher output voltage than the input, such as boosting 12V to 24V or 5V to 12V for various electronic systems.
Flyback Converters
Suitable for creating isolated or non-isolated flyback power supplies, often used in consumer electronics, industrial controls, and other power conversion needs.
Multi-Output Power Supplies
Can be configured to generate multiple output voltages from a single input, serving as the core of a compact power management solution.
Portable Equipment Power Management
Useful in battery-powered devices where a stable, higher voltage rail is needed from a lower battery voltage, optimizing power delivery.
LED Lighting Drivers
Can be adapted to drive strings of LEDs by providing the necessary boosted voltage and current control for efficient illumination.

Key Specifications

Function Step-Up, Step-Up/Step-Down
Topology Boost, Flyback, Forward Converter
Output Type Adjustable
Mounting Type Through Hole
Package / Case TO-220-5
Current - Output 3A (Switch)
Number of Outputs 1
Output Configuration Positive
Frequency - Switching 52kHz
Operating Temperature -40degC ~ 125degC (TJ)
Synchronous Rectifier No
Voltage - Input (Max) 40V
Voltage - Input (Min) 3.5V
Voltage - Output (Max) 60V (Switch)
Supplier Device Package TO-220-5
Voltage - Output (Min/Fixed) 1.23V

Getting Started

To get started with the LM2577T-ADJ/NOPB, engineers should consult the datasheet for example application circuits for boost and flyback configurations. Design tools and reference designs from Texas Instruments can aid in component selection and PCB layout. Prototyping can be done on a breadboard or custom PCB to validate the design.

Also Consider

LM2587T-ADJ/NOPB TITexas Instruments - This is a higher current (5A switch) adjustable boost regulator from the same family, suitable for more power-intensive applications.
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