Synchronous Step-Down Regulators

Manufacturer

Part #

Description

Analog Devices LT83203/LT83205 Synchronous Step-Down Regulators are designed to combine an ultra-low-noise reference with a Silent Switcher® architecture for high efficiency and excellent noise performance. They provide exceptional low-frequency output noise performance and can be programmed with a single resistor. Ideal for high-current, noise-sensitive applications, these regulators minimize EMI emissions while delivering high efficiency.

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Analog Devices LT83203/LT83205 Synchronous Step-Down Regulators

Introduction

The Analog Devices LT83203 and LT83205 are advanced synchronous step-down regulators designed to deliver high efficiency and low noise performance. These regulators utilize a Silent Switcher® architecture, making them ideal for applications where noise sensitivity is critical.

Part Description

The LT83203 and LT83205 regulators feature an ultra-low-noise reference combined with a Silent Switcher® architecture, ensuring exceptional performance in noise-sensitive environments. They provide an output voltage that can be easily programmed using a single resistor, maintaining low-frequency output noise across various output voltages. With a wide input voltage range of 2.8V to 18V and a maximum continuous output current of 3A for the LT83203 and 5A for the LT83205, these regulators are versatile for various applications. They also boast high efficiency, achieving up to 93% efficiency at 2MHz and 90% at 4MHz, making them suitable for high-current applications.

Applications

RF power supplies (PLLs, VCOs, mixers, LNAs, and PAs)
High-speed and precision ADCs/DACs
Low-noise instrumentation
General-purpose power supply

Industries

Telecommunications
Consumer Electronics
Medical Devices
Industrial Automation
Automotive

Usage Ideas

RF Power Supply Design: Create a power supply for RF applications, ensuring low noise and high efficiency for components like PLLs and VCOs.
High-Precision Data Acquisition System: Develop a data acquisition system that utilizes high-speed ADCs, benefiting from the low-noise characteristics of the LT83203/LT83205.
Low-Noise Instrumentation Amplifier: Design an instrumentation amplifier circuit that requires a stable and low-noise power supply for accurate signal processing.

Conclusion

The Analog Devices LT83203 and LT83205 synchronous step-down regulators are exceptional components for applications requiring high efficiency and low noise. Their innovative design and versatility make them suitable for a wide range of industries and applications, from telecommunications to medical devices. Whether you're designing RF power supplies or high-precision instrumentation, these regulators provide the performance needed to meet demanding requirements.