LM2596 3.0 A, Step-Down Switching Regulator is a switch-mode power supply chip produced by American National Semiconductor Corporation. It has features such as adjustable output voltage, high efficiency and less external components.
The LM2596 is a 3 A step‑down (buck) switching regulator offered by ON Semiconductor. The datasheet describes its adjustable‑output version, internal compensation, and typical features such as a guaranteed 3 A output load current, 150 kHz fixed‑frequency oscillator, and wide input voltage range up to 40 V.
Key sections include maximum and operating ratings, pin function descriptions, electrical characteristics, typical performance graphs, PCB layout recommendations, and detailed package dimensions for both TO‑220 and DPAK variants. Ordering information and contact details for technical support are also provided.
| Maximum Output Current | 3.0 A |
|---|---|
| Input Voltage Range | 4.5 V – 40 V |
| Maximum Supply Voltage (Rating) | 45 V |
| Switching Frequency | 150 kHz |
| Thermal Shutdown Threshold | Enabled (internal) |
| Operating Junction Temperature Range | -40 °C – +125 °C |
The maximum supply voltage rating is 45 V.
The regulator operates at a fixed switching frequency of 150 kHz.
It supports an input voltage from 4.5 V up to 40 V.