The LM2574 3.3V 0.5A Step-Down Voltage 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. This device is available in the fixed output voltage of 3.3V 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 LM2574 offers a high-efficiency replacement for the popular three-terminal linear regulator. Because of its high efficiency, the copper traces on the printed circuit board are normally the only heat sinking needed. A standard series of inductors optimized for use with the LM2574 is available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies
LM2574 Pinout
LM2574 Pin Configuration
| Pin No | Pin Name | Description |
|---|---|---|
| 1 | FB | Feedback Pin |
| 2 | SIG GND | Signal Ground Pin |
| 3 | ON/OFF | On/Off Pin |
| 4 | PWR GND | Power Ground Pin |
| 5 | Vin | Input Voltage Pin |
| 6 | * | No Connection |
| 7 | OUT | Output Pin |
| 8 | * | No Connection |
LM2574 Key Features
- Guaranteed 0.5A output current
- Wide input voltage range, 40V, up to 60V for HV version
- Requires only 4 external components
- 52 kHz fixed frequency internal oscillator
- TTL shutdown capability, low power standby mode 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 converter (Buck-Boost)
You can download this datasheet for LM2574 3.3V 0.5A Step-Down Voltage Regulator – Datasheet from the link given below:
