The LM2594 regulator is a monolithic integrated circuit that provides all the active functions for a step-down (buck) switching regulator, capable of driving a 0.5A load with excellent line and load regulation. The device is available in fixed output voltages of 3.3V, 5V, 12V, and an adjustable output version, and are packaged in an 8-lead DIP and an 8-lead surface mount package. Requiring a minimum number of external components, the regulator is simple to use and features internal frequency compensation†, a fixed-frequency oscillator, and improved line and load regulation specifications.
The LM2594 operates at a switching frequency of 150 kHz thus allowing smaller-sized filter components than what would be needed with lower frequency switching regulators. Because of its high efficiency, the copper traces on the printed circuit board are normally the only heat sinking needed.
LM2594 Pinout
LM2594 Pin Configuration
| Pin No | Pin Name | Description |
|---|---|---|
| 1 | * | No Connection |
| 2 | * | No Connection |
| 3 | * | No Connection |
| 4 | FB | FeedBack Pin |
| 5 | ON’/OFF | Complement On/Off Pin |
| 6 | GND | Ground Pin |
| 7 | Vin | Input Voltage Pin |
| 8 | OUTPUT | Output Pin |
LM2594 Key Features
- Input voltage range up to 60V
- Requires only 4 external components
- 150 kHz fixed frequency internal oscillator
- TTL Shutdown capability
- Low power standby mode, IQ typically 85 µA
- High Efficiency
- Uses readily available standard inductors
- Thermal shutdown and current limit protection
Application
- Simple high-efficiency step-down (buck) regulator
- Efficient pre-regulator for linear regulators
- On-card switching regulators
- Positive to Negative convertor
You can download this datasheet for LM2594 Adjustable Step-Down Voltage Regulator – Datasheet from the link given below:
