POWER CHIPS LM2596S-ADJ(UMW)

The **UMW LM2596S-ADJ** is a widely used, high-efficiency monolithic step-down (buck) DC-DC converter from UMW, capable of delivering up to 3 A continuous output current. This adjustable-output version of the classic LM2596/LM2596HV family integrates all active functions of a switching regulator — including an internal high-current N-channel power MOSFET — while requiring only a minimal number of external components for a complete design.

**Key Specifications:**
– Brand: UMW
– Part Number: LM2596S-ADJ
– Topology: Non-synchronous buck (step-down)
– Input Voltage Range: up to 40 V (typical 4.5 V to 40 V depending on output)
– Output Voltage Range: 1.2 V to 37 V (adjustable via external feedback divider)
– Output Current: up to 3 A
– Switching Frequency: Fixed 150 kHz
– Quiescent Current (Iq): 80 µA (typ., no-load)
– Integrated Switch: Built-in high-side N-MOSFET
– Regulation: Excellent line and load regulation
– Internal Features: Built-in frequency compensation and fixed-frequency oscillator
– Protection Features: Thermal shutdown, current limiting
– Package: TO-263-5 (DDPAK / D²PAK-5, 5 leads with tab)
– Packaging: Tape & Reel
– Operating Ambient Temperature: –40 °C to +125 °C (TA)

**Typical Applications:**
– 12 V / 24 V industrial and automotive power supplies
– Distributed point-of-load regulation
– Battery chargers, adapters, and backup systems
– Embedded systems, IoT devices, and consumer electronics
– LED drivers, instrumentation, test equipment, and general-purpose adjustable buck conversion

The LM2596S-ADJ offers proven reliability, simple external circuitry, high efficiency, and robust performance in a thermally enhanced TO-263 package — making it one of the most popular and cost-effective 3 A adjustable buck regulators for wide-input (up to 40 V) applications across industrial, automotive, consumer, and hobbyist designs.