LM2577T-12

Description：IC REG BST FLYBCK 12V 3A TO220-5
Series：SIMPLE SWITCHER®
Mfr：Texas Instruments
Package：Tube

SKU:43c22b22a3fd Category: Voltage Regulators - DC DC Switching Regulators Brand: Texas Instruments

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Product introduction

LM2577T-12 is listed in the Voltage Regulators - DC DC Switching Regulators range at ChipApex. The manufacturer field lists Texas Instruments. Its product description is IC REG BST FLYBCK 12V 3A TO220-5. Review the specifications below when checking this part for your BOM.

Voltage Regulators - DC DC Switching Regulators specifications for LM2577T-12

Description：IC REG BST FLYBCK 12V 3A TO220-5
Series：SIMPLE SWITCHER®
Mfr：Texas Instruments
Package：Tube
Function：Step-Up, Step-Up/Step-Down
Output Configuration：Positive or Negative
Topology：Boost, Flyback, Forward Converter
Output Type：Fixed
Number of Outputs：1
Voltage - Input (Min)：3.5V
Voltage - Input (Max)：40V
Voltage - Output (Min/Fixed)：12V
Voltage - Output (Max)：-
Current - Output：3A (Switch)
Frequency - Switching：52kHz
Synchronous Rectifier：No
Operating Temperature：-40°C ~ 125°C (TJ)
Mounting Type：Through Hole
Package / Case：TO-220-5
Supplier Device Package：TO-220-5
Grade：-
Qualification：-

Voltage Regulators - DC DC Switching Regulators datasheet and documents for LM2577T-12

LM2577T-12

Voltage Regulators - DC DC Switching Regulators Overview

The LM2577T-12 is a SIMPLE SWITCHER step-up voltage regulator IC manufactured by Texas Instruments. It provides a fixed 12V output with a maximum switch current of 3A. The device operates from an input voltage range of 3.5V to 40V and supports boost, flyback, and forward converter topologies. It features a 52kHz switching frequency and is housed in a TO-220-5 through-hole package. The component is rated for a junction temperature range of -40°C to 125°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

Integrated 3A power switch for high-current step-up applications
Fixed 12V output eliminates external feedback resistor requirements
Internal oscillator enables simple circuit design without external timing components

Voltage Regulators - DC DC Switching Regulators Applications

DC-DC step-up power supplies
Flyback converter designs
Forward converter circuits

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'T-12' to confirm the fixed 12V output variant, as the LM2577 family includes adjustable and other fixed voltage options. Confirm the package type is TO-220-5 with formed leads. Check for RoHS compliance status if required for your assembly process. Note that availability may vary as this is a legacy component.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this part when a stable 12V output is required from an input voltage between 3.5V and 40V. Ensure the application demands up to 3A switch current capability. Consider the TO-220-5 package for through-hole mounting and thermal dissipation needs. Verify that the 52kHz switching frequency aligns with your electromagnetic interference constraints and passive component size preferences.

Voltage Regulators - DC DC Switching Regulators Part Context

The LM2577 series belongs to Texas Instruments' SIMPLE SWITCHER family of monolithic integrated step-down regulators. While primarily known for buck configurations, the LM2577 can be configured for boost, flyback, and forward topologies. This specific model represents the fixed 12V output version within the broader LM2577 lineup, which also includes adjustable and other fixed voltage variants.