The LM2596 is a simple switch-mode power converter that operates at a frequency of 150 kHz and provides 3A of output power. The device has good line and load regulation and requires a minimum number of external components.
The LM2596 series provides a monolithic integrated solution for a buck switching regulator capable of delivering up to 3 A continuous load current. It operates with a fixed‑frequency 150 kHz oscillator and requires only four external components, making it simple to implement in power‑supply designs.
The device is offered in TO‑220 and TO‑263 surface‑mount packages, with fixed output versions of 3.3 V, 5 V, 12 V and an adjustable version. Internal protection features include over‑temperature shutdown, two‑stage current limiting, and a TTL‑compatible shutdown pin.
| Maximum Output Current | 3 A |
|---|---|
| Switching Frequency | 150 kHz |
| Input Voltage Range | 4.5 V to 40 V |
| Output Voltage Tolerance | ±4 % over line and load |
| Standby Current (ON/OFF pin) | ≈80 µA |
| Package Types | 5‑lead TO‑220 and 5‑lead TO‑263 |
The LM2596 uses a fixed internal oscillator at 150 kHz.
It can supply up to 3 A of continuous load current.
Fixed versions are 3.3 V, 5 V, and 12 V, plus an adjustable version.
It includes over‑temperature shutdown, two‑stage current limiting, and a TTL‑compatible shutdown pin.