Inverting Micropower DC/DC Converters with Schottky

The LT3483/LT3483A are micropower inverting DC/DC converters featuring integrated Schottky diodes and a single resistor feedback mechanism. Their compact package size, high integration level, and the use of small surface mount components allow for a solution size as small as 40 mm². These devices exhibit a quiescent current of only 40 µA at no load, which further reduces to 0.1 µA in shutdown mode. A current-limited, fixed off-time control scheme conserves operating current, resulting in high efficiency across a wide range of load currents. A precisely trimmed 10 µA feedback current enables single resistor feedback and virtually eliminates feedback loading on the output. The 40V switch allows for voltage outputs up to 38V without the need for expensive transformers. The LT3483/LT3483A's low 300 ns off-time facilitates the use of small low-profile inductors and capacitors, minimizing footprint and cost in space-constrained portable applications.

The LT3483 and LT3483A are designed for applications requiring efficient power conversion in compact spaces. The micropower inverting DC/DC converters can efficiently convert a higher input voltage to a lower output voltage while maintaining high efficiency, which is critical in battery-powered devices. The integrated Schottky diode minimizes voltage drops and enhances overall efficiency, while the single resistor feedback simplifies the design process and reduces component count.

The devices are equipped with a current-limited, fixed off-time control scheme that optimizes energy usage, ensuring that power consumption remains low even under varying load conditions. The quiescent current of 40 µA signifies that the device can operate effectively in low-power applications, making it suitable for devices that require long battery life. When the device enters shutdown mode, the current consumption drops to an ultra-low 0.1 µA, further extending battery life when the device is not in active use.

The ability to generate output voltages up to 38V without external transformers simplifies circuit design and reduces costs, making the LT3483/LT3483A ideal for portable applications where space and weight are at a premium. The low off-time of 300 ns enables the use of small inductors and capacitors, which not only reduces the overall size of the circuit but also minimizes the cost associated with larger components.

These converters are suitable for a variety of applications, including portable instrumentation, battery-powered devices, and other space-sensitive electronic designs. The availability of demo boards allows for easy evaluation and integration into existing systems, facilitating rapid prototyping and design validation.The LT3483/LT3483A are micropower inverting DC/DC converters with integrated Schottky and one resistor feedback. The small package size, high level of integration and use of tiny surface mount components yield a solution size as small as 40mm2.

The devices feature a quiescent current of only 40 A at no load, which further reduces to 0. 1 A in shu tdown. A current limited, fixed off-time control scheme conserves operating current, resulting in high efficiency over a broad range of load current. A precisely trimmed 10 A feedback current enables one resistor feedback and virtually eliminates feedback loading of the output.

The 40V switch enables voltage outputs up to 38V to be generated without the use of costly transformers. The LT3483/LT3483A`s low 300ns off-time permits the use of tiny low profile inductors and capacitors to minimize footprint and cost in space-conscious portable applications.

* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer`s responsibility to verify proper and reliable operation in the actual end application. 🔗 External reference