LT3511EMS#TRPBF Integrated Circuits (ICs)

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LT3511EMS#TRPBF Application Field and Working Principle

The LT3511EMS#TRPBF is a 2-Phase, 2-level synchronous Down-Step regulator from Linear Technology, equipped with a high-density, high-performance DC/DC conversion platform. It features high efficiency, fast transient response and excellent load regulation for high-current industrial, consumer and automotive applications. This device is housed in the innovative PowerSoC™ package, which reduces board space and eliminates the need for multiple components. The PT3511EMS#TRPBF can operate at up to 500 kHz, allowing for high efficiency designs with small form-factor inductors and capacitors.

Application Field

The LT3511EMS#TRPBF is ideal for automotive, consumer and industrial Power Supply applications, and is suitable for a wide range of DC/DC converters such as switched power supplies and voltage regulator modules. These applications include:

• Automotive
• Battery-powered automotive electronics
• Auxiliary DC/DC converters
• Consumer
• Digital still/video cameras
• Portable media players
• Industrial
• Medical
• Industrial automation

Working Principle

The LT3511EMS#TRPBF circuit includes two synchronous switching regulators referred to as the buck and the boost stage. Both stages are implemented in a single PowerSoC™ package with two switches, two rectification circuits, two voltage followers (VF) and two compensation networks. The LT3511EMS#TRPBF is programmed to operate in three different input/output configurations. These include: Input+ Buck, Input- Buck and Boost. The buck regulator is dedicated to provide a precise regulated output voltage from a wide range of input voltage sources while the boost stage senses any excess input voltage, turning it into a feedback to control the buck stage.

The LT3511EMS#TRPBF features an analog compensation network for complete control loop optimization, as well as digital control for precise loop control and protection. The analog compensation network allows for fast transient response, a low output ripple, wide bandwidth, and easy compensation over a large range of clock frequencies. The digital control allows for precise loop control that limits the in-rush current, and prevents over temperature shutdown and over current protection signals.

The LT3511EMS#TRPBF enables Dual-Phase, 2-Level synchronous Down-Step topologies and require fewer external components than traditional synchronous regulators, reducing board space and EMI propensity. This device is also equipped with a high-performance, low noise 2-phase circuit, which provides up to 5A of continuous output current per channel.

Conclusion

The LT3511EMS#TRPBF is an advanced high-efficiency, high-density DC/DC conversion platform, ideal for automotive, consumer and industrial Power Supply applications. This device is equipped with two synchronous switching regulators, and features an analog compensation network for fast transient response, a low output ripple, wide bandwidth, and easy compensation over a large range of clock frequencies. The LT3511EMS#TRPBF requires fewer external components than traditional synchronous regulators, reducing board space and EMI propensity.

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