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LM2576 Buck Regulator
LM2576
Texas Instrumentspower regulator
The LM2576 is a 3A step-down (buck) switching regulator with a 52kHz internal oscillator. It is available in fixed 3.3V, 5V, 12V and 15V versions or an adjustable version, needing only four external components and offering shutdown and thermal protection.
In stock
Specifications
10- Output Voltage
- 3.3, 5, 12, 15, or adjustable V
- Adjustable Output Voltage Range
- 1.23 to 37 V
- Output Current Continuous
- 3 A
- Input Voltage Range
- 40 V
- Switching Frequency
- 52 kHz
- Current Limit
- 5.8 A
- Standby Current
- 50 μA
- Efficiency
- 88 %
- Operating Temperature Range
- -40 to 125 °C
- Package Types
- TO-220, TO-263
Pinout
5| Pin | Name | Functions | Notes |
|---|---|---|---|
| 1 | VIN | POWER | Supply input to the collector of the high-side transistor; connect to supply and input bypass capacitors. |
| 2 | OUTPUT | GPIO | Emitter of the power transistor; switching node connected to the inductor and catch diode. |
| 3 | GROUND | GND | Ground pin; path to input capacitor must be as short as possible. |
| 4 | FEEDBACK | ADC | Feedback sense input; connect to feedback divider midpoint (ADJ) or directly to output capacitor (fixed). |
| 5 | ON/OFF | GPIO | Enable input; high = OFF, low = ON. Connect to GND to enable. Do not leave floating. |
Interactive pinout
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LM2576
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