Specification	LM2576WT

Current - Output	3 A
Frequency - Switching	52 kHz
Function	Step-Down
Mounting Type	Through Hole
Number of Outputs	1
Operating Temperature [Max]	125 ¯C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive
Output Type	Adjustable
Package / Case	TO-220-5
Supplier Device Package	TO-220-5
Synchronous Rectifier	False
Topology	Buck
Voltage - Input (Min) [Min]	4 V
Voltage - Output (Max)	37 V
Voltage - Output (Min/Fixed)	1.23 V

LM2576 Series

3A Step-Down SMPS Regulator

Part	Supplier Device Package	Topology	Voltage - Input (Min) [Min]	Number of Outputs	Operating Temperature [Min]	Operating Temperature [Max]	Package / Case	Output Configuration	Function	Output Type	Frequency - Switching	Current - Output	Mounting Type	Voltage - Output (Min/Fixed)	Output Type	Voltage - Output (Max)
Microchip Technology LM2576-5.0WU-TR	TO-263-5	Buck	4 V	1	-40 °C	125 ¯C	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	Positive	Step-Down	1.81 mOhm	52 kHz	3 A	Surface Mount	5 V
Microchip Technology LM2576-12BT	TO-220-5	Buck	4 V	1	-40 °C	125 ¯C	TO-220-5	Positive	Step-Down	1.81 mOhm	52 kHz	3 A	Through Hole	12 V
Microchip Technology LM2576-3.3BU	TO-263-5	Buck	4 V	1	-40 °C	125 ¯C	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	Positive	Step-Down	1.81 mOhm	52 kHz	3 A	Surface Mount	3.3 V
Microchip Technology LM2576BU	TO-263-5	Buck	4 V	1	-40 °C	125 ¯C	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	Positive	Step-Down		52 kHz	3 A	Surface Mount	1.23 V	Adjustable	37 V
Microchip Technology LM2576-3.3BT	TO-220-5	Buck	4 V	1	-40 °C	125 ¯C	TO-220-5	Positive	Step-Down	1.81 mOhm	52 kHz	3 A	Through Hole	3.3 V
Microchip Technology LM2576-5.0BU	TO-263-5	Buck	4 V	1	-40 °C	125 ¯C	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	Positive	Step-Down	1.81 mOhm	52 kHz	3 A	Surface Mount	5 V
Microchip Technology LM2576-12WT	TO-220-5	Buck	4 V	1	-40 °C	125 ¯C	TO-220-5	Positive	Step-Down	1.81 mOhm	52 kHz	3 A	Through Hole	12 V
Microchip Technology LM2576-3.3WU	TO-263-5	Buck	4 V	1	-40 °C	125 ¯C	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	Positive	Step-Down	1.81 mOhm	52 kHz	3 A	Surface Mount	3.3 V
Microchip Technology LM2576-12BU TR	TO-263-5	Buck	4 V	1	-40 °C	125 ¯C	D2PAK (5 Leads + Tab) TO-263-6 TO-263BA	Positive	Step-Down	1.81 mOhm	52 kHz	3 A	Surface Mount	12 V
Microchip Technology LM2576WT	TO-220-5	Buck	4 V	1	-40 °C	125 ¯C	TO-220-5	Positive	Step-Down		52 kHz	3 A	Through Hole	1.23 V	Adjustable	37 V

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Tube	1	$ 1.75
		25	$ 1.46
		100	$ 1.33
Microchip Direct	TUBE	1	$ 1.75
		25	$ 1.46
		100	$ 1.33
		1000	$ 1.28
		5000	$ 1.27
		10000	$ 1.26

Description

General part information

LM2576 Series

The LM2576 series of monolithic integrated circuits provide all the active functions for a step-down (buck) switching regulator. Fixed versions are available with a 3.3V, 5V, or 12V fixed output. Adjustable versions have an output voltage range from 1.23V to 37V. Both versions are capable of driving a 3A load with excellent line and load regulation.

These regulators are simple to use because they require a minimum number of external components and include internal frequency compensation and a fixed-frequency oscillator.

The LM2576 series offers a high efficiency replacement for popular three-terminal adjustable linear regulators. It substantially reduces the size of the heat sink, and in many cases no heat sink is required.

Documents

Technical documentation and resources

Datasheet

LM2576 - 52 kHz Simple 3A Buck Regulator

Data Sheets