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The LTC3260 is a highly versatile DC/DC converter designed to generate both positive and negative power supplies from a single input voltage, ranging from 4.5V to 32V. This makes it ideal for applications where a bipolar power supply is needed but not readily available at the point of load. The device features a charge pump with an inverting configuration, along with two low-noise LDO regulators, enabling efficient and compact power solutions.
One of the key advantages of the LTC3260 is its ability to switch between two operating modes: BurstMode and constant-frequency mode. In BurstMode, the converter operates with high efficiency at light loads, which is particularly beneficial for battery-powered devices. On the other hand, the constant-frequency mode ensures minimal noise, making it suitable for sensitive applications such as precision analog circuits or communication systems.
The LTC3260 allows users to adjust the charge pump frequency using an external resistor, offering flexibility in system design. When set to 500kHz, the device provides optimal output performance with very low ripple, typically just a few millivolts. However, reducing the frequency can further improve efficiency at light loads, albeit with a slight increase in output ripple.
In addition to its charge pump functionality, the LTC3260 includes two independent LDO regulators. These can each support up to 50mA of load current, with a dropout voltage of only 300mV. Each LDO has an adjustable output voltage through a simple resistor divider, giving designers greater control over the final output levels. The negative LDO can be enabled or disabled separately, allowing for flexible power management.
The LTC3260 is available in two package options: a compact 3mm x 4mm DFN and a thermally enhanced 16-lead MSOP. This makes it well-suited for space-constrained designs while maintaining excellent thermal performance. With its combination of a charge pump and two LDOs, the LTC3260 offers a complete power solution for a wide range of applications, including industrial, automotive, and portable electronics.
Overall, the LTC3260 is an excellent choice for engineers looking to simplify their power supply design without compromising on performance, efficiency, or noise characteristics. Whether you need high efficiency for low-power applications or low noise for sensitive systems, this device delivers reliable and flexible power management in a small form factor.
August 08, 2025