Product Overview: LT3481IDD from Linear Technology
The LT3481IDD is a versatile and compact step-down switching regulator designed by Linear Technology, now part of Analog Devices, that delivers high performance in a small package. This integrated circuit (IC) is particularly suitable for portable equipment and automotive applications due to its wide input voltage range, high efficiency, and low quiescent current.
Key Features
- Wide Input Voltage Range: The LT3481IDD operates with an input voltage range from 3.6V to 34V, making it ideal for applications that require a wide range of input sources, including single-cell Li-Ion batteries to automotive inputs.
- Adjustable Switching Frequency: The switching frequency can be set from 300kHz to 2.8MHz, allowing designers to optimize the regulator for efficiency or component size.
- Low Quiescent Current: Its low quiescent current of only 45μA (at no load) helps to extend battery life in portable applications.
- Integrated 2A Switch: The device includes a high-efficiency 2A, 0.18Ω switch that can deliver output currents up to 2A, depending on input voltage and duty cycle.
- Burst Mode® Operation: Burst Mode operation ensures high efficiency at low output currents, which is critical for battery-powered devices.
- Thermal Protection: It comes with thermal shutdown and current limit protection, safeguarding the device and the load from potential damage due to overheating and overcurrent conditions.
Applications
The LT3481IDD is designed for a range of applications, particularly where space is at a premium and power efficiency is crucial. It is commonly used in:
- Portable Power Devices
- Automotive and Industrial Supplies
- Distributed Power Systems
- Battery-Powered Equipment
Package and Availability
The LT3481IDD is available in a low-profile (0.75mm) 10-lead DFN package with a 3mm x 3mm footprint. This small form factor makes it an excellent choice for space-constrained applications. For design flexibility, the IC is also available in a thermally enhanced MSOP-10 package.
With its robust feature set and compact size, the LT3481IDD from Linear Technology stands out as a powerful solution for efficient power conversion in a wide array of electronic devices.
