The LM2576-ADJ is a monolithic integrated circuit that provides all the active functions for a step-down (buck) switching regulator. This device features an output voltage that is adjustable from 3.3V to 37V and is capable of driving a 3A load with excellent line and load regulation. Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation and a fixed-frequency oscillator.
The LM2576 offers a high-efficiency replacement for the popular three-terminal adjustable linear regulator. It substantially reduces the size of the heat sink, and in many cases, no heat sink is required.
LM2576 Pinout
LM2576 Pin Configuration
| Pin No | Pin Name | Description |
|---|---|---|
| 1 | ON/OFF | On/Off Pin |
| 2 | FEEDBACK | Feedback Pin |
| 3 | GND | Ground Pin |
| 4 | OUT | Output Pin |
| 5 | Vin | Input Voltage Pin |
LM2576 Key Features
- Guaranteed 3A output current
- Wide input voltage range, 4V to 40V
- Wide output voltage range, 1.23V to 37V
- Requires only 6 external components
- 52 kHz fixed frequency internal oscillator
- Low power standby mode, la typically <200 A
- Efficiency typically over 80%
- Uses readily available standard inductors
Application
- Simple high-efficiency step-down (buck) regulator
- Efficient pre-regulator for linear regulators On-card switching regulators
- Positive to negative converter (Inverting Buck-Boost)
- Isolated Fly back Converter using minimum number of external components
You can download this datasheet for LM2576 3.3V 3A Step-Down Voltage Regulator – Datasheet from the link given below:
