LT8610ACHMSE-1#TRPBF

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Introduction

The LT8610ACHMSE-1#TRPBF is a high-efficiency buck-boost DC-DC converter that operates over an input voltage range of 2V to 32V and provides an adjustable output voltage of 0.9V to 30V. It features a full-featured high-efficiency synchronous current mode control buck-boost topology for excellent line and load regulation and accurate output voltage regulation. Its wide input voltage range and high current rating make it ideal for applications ranging from battery-powered IoT devices to auxiliary power systems in motor drives and power systems. Its integrated power MOSFETs allow for up to 10A continuous output current with a peak efficiency up to 98% and no-load quiescent current as low as 34μA.

Application Field

The LT8610ACHMSE-1#TRPBF is suitable for applications such as distributed power systems requiring a wide input voltage range and low external component count, automotive systems requiring galvanic isolation between the primary and auxiliary power circuits, and systems requiring an adjustable output voltage range. It is also suitable for applications with high power or voltage conversion requirements, such as large industrial systems or mobile communication infrastructure. Additionally, its wide input voltage range and synchronous buck-boost operation make it ideal for applications that require positive-voltage output tracking or pre-regulating the voltage supplied to sensitive components.

Working Principle

The LT8610ACHMSE-1#TRPBF utilizes a synchronous current mode control, with a combination of an internal oscillator, an accurate peak current limit, and a programmable frequency setpoint for controlling its performance. The device also contains a power MOSFET, a synchronous rectifier, and a voltage reference, which together create an adjustable constant switching frequency buck-boost DC-DC converter. The internal power MOSFETs switch between buck and boost operation depending on the output voltage. The switching frequency can be set to either a fixed frequency or programmed from 300 kHz to 2.2 MHz depending on the output voltage requirements and the desired operating efficiency.

The voltage reference input is adjustable, allowing the output voltage to be programmed to as low as 0.9V and up to 30V with a 0.1% accuracy. Similarly, a maximum output current limit is adjustable over the range of 1A to 10A with +/-2% accuracy and can be programmed for either continuous or burst-mode operation, allowing for increased efficiency during light load conditions. The LT8610ACHMSE-1#TRPBF also offers an extremely low quiescent current of 34μA and an ENABLE pin that can be used to lock the output voltage.

Conclusion

The LT8610ACHMSE-1#TRPBF is an efficient synchronous buck-boost DC-DC converter that offers adjustable output voltage, current limit, and switching frequencies over a wide input voltage range. Its high efficiency and wide input voltage range make it ideal for applications such as distributed power systems, automotive applications, and systems requiring positive-voltage output tracking and/or pre-regulation. Its advanced features, such as a low quiescent current and an adjustable current limit, help to ensure reliable and efficient operation in these and many other applications.

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