Integrated Circuits (ICs)

LM2574-3.3YN

Active

Microchip Technology

0.5A STEP-DOWN SMPS REGULATOR

Integrated Circuits (ICs)

LM2574-3.3YN

Active

Microchip Technology

0.5A STEP-DOWN SMPS REGULATOR

Specifications Series Pricing CAD Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	LM2574-3.3YN

Current - Output	500 mA
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	Fixed
Package Length	0.3 in
Package Name	8-DIP, 8-PDIP
Package Width	7.62 mm
Synchronous Rectifier	No
Topology	Buck
Voltage - Input (Max)	40 V
Voltage - Output (Min/Fixed)	3.3 V

LM2574 Series

0.5A Step-Down SMPS Regulator

Part	Voltage - Input (Max)	Output Configuration	Frequency - Switching	Output Type	Current - Output	Voltage - Output (Min/Fixed)	Voltage - Output (Max)	Mounting Type	Package Length	Package Name	Package Width	Number of Outputs	Function	Topology	Synchronous Rectifier	Operating Temperature (Max)	Operating Temperature (Min)
Microchip Technology LM2574BN	40 V	Positive	52 kHz	Adjustable	500 mA	1.23 V	37 V	Through Hole	0.3 in	8-DIP 8-PDIP	7.62 mm	1	Step-Down	Buck	No	125 °C	-40 °C
Microchip Technology LM2574-3.3YN	40 V	Positive	52 kHz	Fixed	500 mA	3.3 V		Through Hole	0.3 in	8-DIP 8-PDIP	7.62 mm	1	Step-Down	Buck	No	125 °C	-40 °C
Microchip Technology LM2574-12YN	40 V	Positive	52 kHz	Fixed	500 mA	12 V		Through Hole	0.3 in	8-DIP 8-PDIP	7.62 mm	1	Step-Down	Buck	No	125 °C	-40 °C
Microchip Technology LM2574YN	40 V	Positive	52 kHz	Adjustable	500 mA	1.23 V	37 V	Through Hole	0.3 in	8-DIP 8-PDIP	7.62 mm	1	Step-Down	Buck	No	125 °C	-40 °C
Microchip Technology LM2574-3.3BN	40 V	Positive	52 kHz	Fixed	500 mA	3.3 V		Through Hole	0.3 in	8-DIP 8-PDIP	7.62 mm	1	Step-Down	Buck	No	125 °C	-40 °C
Microchip Technology LM2574-12BN	40 V	Positive	52 kHz	Fixed	500 mA	12 V		Through Hole	0.3 in	8-DIP 8-PDIP	7.62 mm	1	Step-Down	Buck	No	125 °C	-40 °C
Microchip Technology LM2574-5.0YN	40 V	Positive	52 kHz	Fixed	500 mA	5 V		Through Hole	0.3 in	8-DIP 8-PDIP	7.62 mm	1	Step-Down	Buck	No	125 °C	-40 °C

Pricing

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

Distributor	Package	Quantity	$	Updated

Digikey	Tube	1	$ 1.21	<6d
		25	$ 1.01
		100	$ 0.92
Microchip Direct	TUBE	1	$ 1.21	30d+
		25	$ 1.01
		100	$ 0.92
		1000	$ 0.89
		5000	$ 0.88
		10000	$ 0.87
RS Group	Minimum Package Quantity (MPQ)	400	$ 0.84	30d+

CAD

3D models and CAD resources for this part

Description

General part information

LM2574 Series

The LM2574 family is a series of easy to use fixed and adjustable switching voltage regulators. The LM2574 contains all of the active circuitry necessary to construct a stepdown (buck) switching regulator and requires a minimum of external components.

The LM2574 is available in 3.3V, 5V, and 12V fixed output versions, or an adjustable version with an output voltage range of 1.23V to 37V. Output voltage is guaranteed to ±4% for specified input and load conditions.

The LM2574 can supply 0.5A while maintaining excellent line and load regulation. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault conditions.

Documents

Technical documentation and resources

LM2574 - 52 kHz Simple 0.5A Buck Regulator

Data Sheets

LM2574-3.3YN | Datasheet

Datasheet