Xl1509-5.0 E1 SOP8L Buck DC to DC Converter IC
Xl1509-5.0 E1 SOP8L Buck DC to DC Converter IC
XL1509 Buck DC-DC Converter IC – 2A Step-Down Switching Regulator
The XL1509 is a high-efficiency PWM buck (step-down) DC/DC converter designed for embedded systems, industrial electronics, communication equipment, display systems, and power supply applications. Operating at a fixed 150kHz switching frequency, the XL1509 supports up to 2A output current with low ripple, excellent line/load regulation, and minimal external component requirements, making it ideal for compact and efficient switch-mode power supplies.
Why it’s a System Essential:
• High-Efficiency Buck Conversion: Efficiently converts higher DC input voltages to lower regulated outputs.
• Wide Input Voltage Range: Operates from 4.5V to 40V DC for versatile power supply applications.
• Adjustable & Fixed Output Versions: Available in 3.3V, 5V, 12V, and adjustable output configurations.
• High Output Current Capability: Supports up to 2A continuous output current.
• Minimal External Components: Simplifies SMPS circuit design and PCB layout.
• Integrated Protection Features: Includes thermal shutdown and multi-level current limiting protection.
• Excellent Regulation Performance: Maintains stable output under varying input and load conditions.
Technical Specifications:
• Device Type: PWM Buck (Step-Down) DC/DC Converter
• Part Number: XL1509
• Switching Frequency: 150kHz Fixed Frequency
Electrical Specifications:
• Input Voltage Range: 4.5V to 40V
• Adjustable Output Voltage Range: 1.23V to 37V
• Fixed Output Versions:
• 3.3V
• 5V
• 12V
• Maximum Output Current: 2A
• Maximum Duty Cycle: 100%
• Minimum Dropout Voltage: 1.5V
Integrated Features:
• Internal Frequency Compensation
• Internal Optimized Power Transistor
• TTL Shutdown Capability
• ON/OFF Pin with Hysteresis Function
Protection Features:
• Built-In Thermal Shutdown
• Built-In Current Limit Function
• Built-In Second Current Limit Function
• Frequency Reduction Protection (150kHz to 50kHz During Second Current Limit)
Absolute Maximum Ratings:
• Input Voltage: -0.3V to 40V
• Feedback Pin Voltage: -0.3V to VIN
• ON/OFF Pin Voltage: -0.3V to VIN
• Output Switch Pin Voltage: -0.3V to VIN
Package Information:
• Package Type: SOIC-8
Features:
• Efficient step-down power conversion
• Adjustable and fixed voltage support
• High-current switching regulation
• Integrated protection circuitry
• Compact low-component-count design
• Stable industrial-grade performance
Applications:
• LCD monitors and LCD TVs
• Digital photo frames
• Set-top boxes
• ADSL modems
• Telecom and networking equipment
• Embedded systems
• Industrial automation electronics
• Battery-powered devices
• DIY power supply projects
Best For:
Ideal for students, hobbyists, makers, engineers, and power electronics developers working on switch-mode power supplies, embedded systems, display electronics, industrial automation, communication equipment, and DC-DC conversion applications requiring reliable high-efficiency 2A buck voltage regulation.
Specifications
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