Overview
Features
- VIN range: 2.7V — 10V
- Integrated Schottky diode
- 81% efficiency
- Requires only 4 external components
- Up to 20V of output voltage
- 30mA maximum LED current
- Open LED protection (OVP)
- 1.2MHz PWM switching frequency
- Low feedback voltage (20OmV typical)
- Wide range of PWM dimming
- Drives up to 5 LEDs
- 500mA switch current limit
- 220nF output capacitor
- Available in 2mm x 2mm x 0.75mm MLPD-W8 and SOT23-6 packages
- Packages are fully WEEE and RoHS compliant
Packaging
- SOT-23-6, MLPD-W8
Order Codes
- SC4509SKTRT: Lead-Free, RoHS and WEEE Compliant, 3000 pcs.Tape & Reel
- SC4509WLTRT: Lead-Free, RoHS and WEEE Compliant, 3000 pcs.Tape & Reel
- SC4509EVB: SC4509 Evaluation Board
PB Free/ROHS
Learn More →
| Documents | Release Date | Type |  |
|---|---|---|---|
| SC4509 Datasheet | 2019-05-31 | | |
Applications
- Digital Video Cameras
- White LED Backlight Driver
- OLED Display Driver
- Portable Media Players
- GPS Receivers
- Cellular Phones
- PDAs and Handheld Computers
Inventory
| Product | Country | Distributor | Qty | Buy |
|---|
Resources
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The Internet of Things (IoT) landscape is witnessing a significant milestone. LoRaWAN®, the low-power wide-area network (LPWAN) standard protocol that has quietly powered smart city initiatives, industrial IoT applications and environmental monitoring projects worldwide, has crossed a threshold that signals its arrival as a mainstream connectivity solution.
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LoRaWAN® Reaches Critical Mass: 125 Million…
A Growing Crisis Demands Smart Solutions
Spain loses 25% of its water to leaks1. Portugal loses 33%2. Meanwhile, Catalonia's reservoirs have reached historic lows and Portugal's Algarve region has imposed severe restrictions with dams at just 20% capacity.The Iberian Peninsula faces a growing water crisis.
Spain has emerged as a significant adopter of Advanced Metering Infrastructure with LoRaWAN® as the leading choice of IoT connectivity, with over 647,000 LoRaWAN-enabled water meters already deployed—and the European Union (EU) is backing expansion through its Strategic Projects for Economic Recovery and Transformation (PERTE) funding program.
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The Smart Water Revolution: How LoRaWAN® is…
The evolution of smart metering has transformed how utilities collect and manage metering and consumption data. At the heart of this digital transformation of utilities lies the wireless M-Bus (wM-Bus) protocol, a wireless communication protocol for automated meter reading that has been adopted for over 20 years through the standard defined by the European Normalization Committee (CEN) under the standard series EN13757, encompassing Europe and beyond. In this blog post, we'll explore our recent demo featuring the Semtech LR1121 and LR2021, and discuss how enabling the dual connectivity for wM-Bus and LoRaWAN® is today’s demand of utilities for Smart Metering.
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wM-Bus and LoRaWAN® Demo with LR1121 and LR2021
The 2010s marked a defining decade for Semtech as the company accelerated its transformation into a connectivity and sensing powerhouse. Building on the foundation established in previous decades, Semtech made strategic moves that positioned it at the forefront of several high-growth technology markets, including the Internet of Things (IoT), advanced surge protection and high-speed optical networking.
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Semtech in the 2010s: Low-Power Networking, Surge….png)
Electronica India 2025, held from September 17–19 at the Bangalore International Exhibition Centre (BIEC), was a resounding success.
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Electronica India 2025: Semtech Advancing…
The Things Conference 2025, held in Amsterdam, attracted over 2,000 participants, featured 180 speakers and 250 presentations, making it a significant event in the IoT calendar. Semtech was notably prominent, reflecting its leadership in the LoRa® ecosystem. The conference highlighted the growing global adoption of LoRa technology, with Semtech's advancements in LoRa Plus™ and 4th-generation devices underscoring its commitment to innovation and scalability in Internet of Things (IoT) solutions. The event served as a platform for industry leaders to discuss the future of IoT connectivity, emphasizing the role of LoRa in enabling the multiple verticalsrelyingon IoTto enhance operational efficiencies and sustainability.
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The Things Conference 2025: LoRa® Ecosystem…Talk With Us Today
Semtech is here to help. When you have questions, our experts have answers.
