power chips XL1509-5.0

The **UMW XL1509-5.0** is a high-efficiency, fixed 5.0 V output, monolithic step-down (buck) DC-DC converter capable of delivering up to 2 A continuous output current. Operating with a fixed 150 kHz PWM switching frequency, it features an integrated high-side power MOSFET, internal frequency compensation, and a fixed-frequency oscillator — requiring only a minimal number of external components for a complete solution.

**Key Specifications:**
– Brand: UMW
– Part Number: XL1509-5.0
– Topology: Non-synchronous buck (step-down)
– Input Voltage Range: 4.5 V to 40 V
– Fixed Output Voltage: 5.0 V
– Output Current: up to 2 A
– Switching Frequency: Fixed 150 kHz
– Quiescent Current (Iq): 2 mA (typ.)
– Duty Cycle Range: 0% to 100% (linear regulation)
– Protection Features: Over-current protection with frequency foldback (reduces to 50 kHz during secondary current limit), thermal shutdown
– Internal Compensation: Built-in, minimizes external parts
– Package: SOIC-8
– Packaging: Tape & Reel
– Operating Temperature Range: –40 °C to +125 °C

**Typical Applications:**
– 12 V / 24 V industrial and automotive power supplies
– Point-of-load regulation for 5 V rails
– Battery-powered equipment and chargers
– Distributed power systems and LED drivers
– Consumer electronics, set-top boxes, routers, and IoT devices
– General-purpose wide-input 5 V buck conversion

The XL1509-5.0 provides excellent line/load regulation, low output ripple, simple design-in, and robust protection in a compact, thermally capable SOIC-8 package — making it a cost-effective, reliable, and widely adopted 2 A step-down regulator for 4.5–40 V to 5 V applications across industrial, automotive, and consumer markets.