The LTC7138 is a high-efficiency buck converter from Linear Technology Corporation, designed to handle input voltages as high as 140V. This device delivers up to 400mA of continuous output current and is ideal for use in telecommunications, industrial, avionics, and automotive applications. Its wide input voltage range—from 4V to 140V—makes it highly versatile for various power supply needs.
The LTC7138 features programmable hysteresis mode, which helps optimize efficiency across a broad range of output currents. It includes an internal 1.8Ω power MOSFET, ensuring reliable and efficient operation. The output current can be set by the user between 100mA and 400mA, depending on the specific application requirements.
The converter offers flexibility in output voltage settings, with options for fixed outputs at 1.8V, 3.3V, or 5V, or a resistor divider can be used to adjust the output voltage from 0.8V up to the input voltage (VIN). This makes it suitable for a variety of custom designs.
Designed with a thermally enhanced MSOP package, the LTC7138 provides extra pin spacing necessary for handling high-voltage inputs. The compact design, requiring only four small external components, makes it perfect for space-constrained applications.
In addition, the LTC7138 consumes just 12μA when operating under no-load conditions, maintaining stable output voltage. This low quiescent current makes it well-suited for battery-powered systems that require long operational life.
The converter’s inherent stability eliminates the need for external compensation, simplifying the design process and reducing the overall footprint of the solution. Other key features include a precision 0.8V ±1% feedback reference, 100% duty cycle differential operation, and support for both internal and external soft-start functions.
Additionally, the feedback comparator output allows multiple LTC7138 devices to be connected in parallel, enabling higher current applications. This makes the LTC7138 a powerful and flexible choice for designers looking for a reliable, efficient, and compact power solution.
0.8mm Pitch
0.8mm Pitch
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