LM2575 Series

1A Step-Down SMPS Regulator

Catalog

1A Step-Down SMPS Regulator

Part	Topology	Function	Voltage - Input (Min)	Package Name	Output Configuration	Operating Temperature (Max)	Operating Temperature (Min)	Output Type	Voltage - Output (Max)	Frequency - Switching	Voltage - Input (Max)	Package Length	Package Width	Voltage - Output (Min/Fixed)	Number of Outputs	Mounting Type	Current - Output	Synchronous Rectifier	Package Leads	Package / Case
Microchip Technology LM2575YWM	Buck	Step-Down	4 V	24-SOIC	Positive	125 °C	-40 °C	Adjustable	37 V	52 kHz	40 V	0.295 in	7.5 mm	1.23 V	1	Surface Mount	1 A	No
Microchip Technology LM2575-12YN	Buck	Step-Down	4 V	16-DIP	Positive	125 °C	-40 °C	Fixed		52 kHz	40 V	0.3 in	7.62 mm	12 V	1	Through Hole	1 A	No
Microchip Technology LM2575-12YWM	Buck	Step-Down	4 V	24-SOIC	Positive	125 °C	-40 °C	Fixed		52 kHz	40 V	0.295 in	7.5 mm	12 V	1	Surface Mount	1 A	No
Microchip Technology LM2575-3.3BN	Buck	Step-Down	4 V	16-DIP	Positive	125 °C	-40 °C	Fixed		52 kHz	40 V	0.3 in	7.62 mm	3.3 V	1	Through Hole	1 A	No
Microchip Technology LM2575-5.0WU-TR	Buck	Step-Down	4 V	D2PAK TO-263-5	Positive	125 °C	-40 °C	Fixed		52 kHz	40 V			5 V	1	Surface Mount	1 A	No	5 Leads
Microchip Technology LM2575-3.3BT	Buck	Step-Down	4 V	TO-220-5	Positive	125 °C	-40 °C	Fixed		52 kHz	40 V			3.3 V	1	Through Hole	1 A	No		TO-220-5
Microchip Technology LM2575-3.3YWM-TR	Buck	Step-Down	4 V	24-SOIC	Positive	125 °C	-40 °C	Fixed		52 kHz	40 V	0.295 in	7.5 mm	3.3 V	1	Surface Mount	1 A	No
Microchip Technology LM2575-5.0WT	Buck	Step-Down	4 V	TO-220-5	Positive	125 °C	-40 °C	Fixed		52 kHz	40 V			5 V	1	Through Hole	1 A	No		TO-220-5
Microchip Technology LM2575BWM-TR	Buck	Step-Down	4 V	24-SOIC	Positive	125 °C	-40 °C	Adjustable	37 V	52 kHz	40 V	0.295 in	7.5 mm	1.23 V	1	Surface Mount	1 A	No
Microchip Technology LM2575YN	Buck	Step-Down	4 V	16-DIP	Positive	125 °C	-40 °C	Adjustable	37 V	52 kHz	40 V	0.3 in	7.62 mm	1.23 V	1	Through Hole	1 A	No

Catalog

1A Step-Down SMPS Regulator

Description

The LM2575 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, 12V, or 15V fixed output. Adjustable versions have an output voltage range from 1.23V to 37V. Both versions are capable of driving a 1A 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 LM2575 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. A standard series of inductors available from several different manufacturers are ideal for use with the LM2575 series. This feature greatly simplifies the design of switch-mode power supplies. The feedback voltage is guaranteed to ±2% tolerance for adjustable versions, and the output voltage is guaranteed to ±3% for fixed versions, within specified input voltages and output load conditions. The oscillator frequency is guaranteed to ±10%. External shutdown is included, featuring less than 200µA standby current. The output switch includes cycle-by-cycle current limiting and thermal shutdown for full protection under fault conditions.