ST1S09IPUR – switching voltage regulator

Description

Monolithic, synchronous step-down (buck) converter designed for high-efficiency power supply applications, offering adjustable output voltage and up to 2 A output current. Operates over an input voltage range from 2.7 V to 6 V, making it suitable for direct powering from battery systems or 5 V rails. Integrated MOSFET transistors and a 1.5 MHz switching frequency allow the use of miniature passive components, promoting compact system design. The regulator includes protection features such as short-circuit, thermal shutdown, and undervoltage lockout. Surface-mounted in a compact DFN-6 package.

Features

• Topology: synchronous buck
• Input voltage: 2.7 V to 6 V
• Output voltage: adjustable (set by external divider)
• Output current: up to 2 A
• Switching frequency: 1.5 MHz
• Quiescent current: 1.5 mA
• Protections: short-circuit, overtemperature, undervoltage lockout (UVLO)
• Number of outputs: 1
• Mounting style: SMD/SMT
• Package: DFN‑6 (miniature)
• Operating temperature: –40 °C to +125 °C
• RoHS compliant