LT3970IMS#TRPBF

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The LT3970IMS#TRPBF is a part of Linear Technology’s Power Management Integrated Circuit (PMIC) voltage regulators and DC to DC switching regulators. It is a high-efficiency, low-noise buck switching regulator designed to provide a wide range of output voltages with adjustable current limit and various protection features. This device can accept inputs from 3V to 24V and provide adjustable output voltages from 0.6V to 20V. It is capable of delivering up to 3A of output current from a wide input voltage range.

The LT3970IMS#TRPBF incorporates Synchronous Rectification for high efficiency, Seamless Transition for low noise, Burst Mode for low power operation, and Selectable Constant On-Time for low noise and excellent load and line regulation. The device also has several programmable protection features, including Over-Voltage, Under-Voltage, Over-Current, Cycle-by-Cycle Current Limit, Power Good, and Thermal Shutdown.

The working principle of the LT3970IMS#TRPBF is based on pulse-width modulation (PWM) principles. It is fed a variable duty cycle signal by an internal or an external clock. This signal is fed to the internal PWM comparator which converts the duty cycle signal into an output voltage with a regulated pulsewidth. The internal current limit circuitry regulates the maximum current to be allowed at the output terminal of the device.

The device is suitable for adjustable voltage regulation applications from a wide input voltage range. It is ideal for powering peripherals from either a single-cell Li-Ion or a multi-cell alkaline battery packs. Applications include space-constrained and battery-power portable products such as cellphones, PDAs, digital cameras, and portable medical equipment.

The LT3970IMS#TRPBF is packaged in a small 4mm x 4mm QFN package and is designed to reduce board space in applications where size is a critical factor. It is available in 5-lead, 8-lead and 10-lead versions. It operates over a wide temperature range from -40°C to +125°C. The device is rated for up to 3A of output current and has a maximum efficiency of over 95%.

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