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The LM2575 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 1A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5V, 12V, 15V, and an adjustable output version.
Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation and a fixed-frequency oscillator.
The LM2575 series offers a high-efficiency replacement for popular three-terminal 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 optimized for use with the LM2575 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies.
Other features include a specified ±4% tolerance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency. External shutdown is included, featuring 50 μA (typical) standby current. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault conditions.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LM1575/LM2575/LM2575HV SIMPLE SWITCHER 1A Step-Down Voltage Regulator datasheet (Rev. E) | 03 Apr 2013 | |
| Application note | Switching regulator fundamentals (Rev. C) | PDF | HTML | 05 Feb 2019 | |
| Application note | Low EMI Layout Made SIMPLE With LM43600/1/2/3 and LM46000/1/2 (Rev. A) | 12 Sep 2014 | ||
| Application note | AN-1197 Selecting Inductors for Buck Converters (Rev. B) | 23 Apr 2013 | ||
| Application note | AN-1246 Stresses in Wide Input DC-DC Converters (Rev. C) | 23 Apr 2013 | ||
| Application note | AN-776 20-W SIMPLE SWITCHER Forward Converter (Rev. A) | 23 Apr 2013 |
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| Package | Pins | Download |
|---|---|---|
| SOIC (DW) | 24 | View options |
| TO-220 (KC) | 5 | View options |
| TO-220 (NDH) | 5 | View options |
| TO-220 (NEB) | 5 | View options |
| TO-263 (KTT) | 5 | View options |
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