The LM2596 regulator is a monolithic integrated circuit that provides all the active functions for a step-down (buck) switching regulator, capable of driving a 3A load with excellent line and load regulation. This device is available in fixed output voltages of 3.3V, 5V, 12V, and an adjustable output version.
Requiring a minimum number of external components, the regulator is simple to use and includes internal frequency compensation† and a fixed-frequency oscillator.
The LM2596 operates at a switching frequency of 150 kHz thus allowing smaller-sized filter components than what would be needed with lower frequency switching regulators. Available in a standard 5-lead TO-220 package with several different lead bend options, and a 5-lead TO-263 surface mount package
LM2596 Pinout
LM2596 Pin Configuration
| Pin No | Pin Name | Description |
|---|---|---|
| 1 | Vin | Input Voltage Pin |
| 2 | OUT | Output Pin |
| 3 | GND | Ground Pin |
| 4 | FB | FeedBack Pin |
| 5 | ON’/OFF | Complement ON/Off Pin |
LM2596 Key Features
- Available in TO-220 and TO-263 packages
- Guaranteed 3A output load current
- Input voltage range up to 40V
- Requires only 4 external components
- Excellent line and load regulation specifications
- 150 kHz fixed-frequency internal oscillator
- TTL shutdown capability
- Low power standby mode, IQ typically 80 µA
- High efficiency
- Uses readily available standard inductors
- Thermal shutdown and current limit protection
Application
- Simple high-efficiency step-down (buck) regulator
- On-card switching regulators
- Positive to negative converter
You can download this datasheet for LM2596 Adjustable 3A Step-Down Voltage Regulator – Datasheet from the link given below:
