25V 600mA synchronous, provides low-noise and jitter-free switching performance

Linear Technology Korea (CEO Hong Sa-kwak) announced the release of a synchronous current mode buck-boost converter (product name: LTC3130, LTC3130-1) that provides a continuous output current of up to 600mA from a wide range of input sources, including single or multi-cell batteries, solar panels, and supercapacitors.

The input voltage range of these devices from 2.4V to 25V and the output range from 1V to 25V (LTC3130 is adjustable) provide a regulated output using an input that is higher, lower, or equal to the output.

User-selectable Burst Mode® operation can lower the standby current to just 1.6µA (1.2µA at no load), improving light-load efficiency and extending battery life. The proprietary buck-boost topology applied to the LTC 3130/-1 provides low-noise and jitter-free switching performance in all operating modes, making it ideal for RF and precision analog applications sensitive to power supply noise.

In addition, this device supports a programmable MPPC (Maximum Power Point Control) function, ensuring optimal power supply from non-ideal power sources such as solar cells.

In addition to all the characteristics of the LTC3130, the LTC3130-1 provides four selectable fixed output voltage characteristics (1.8V, 3.3V, 5V, 12V), so there is no need to use a separate resistor divider compared to the adjustable output version.

The LTC3130/-1 contains four low-RDSON N-channel MOSFETs internally, providing an efficiency of up to 95%. Due to its very low quiescent current, the converter can be started even with very low power sources of about 7.5µW, making the LTC3130/-1 ideal for applications requiring power from weak sources, such as thin-film solar cells. Conversely, low-noise continuous switching can be enabled by disabling burst mode operation.

The 1.2MHz fixed switching frequency of the LTC3130/-1 minimizes the size of external components while lowering noise and increasing efficiency. It features an internal compensation circuit and soft-start function, allowing for a reduction in the number of external components and a simplified design.

In addition, it includes a PowerGood indicator, pin-configurable current limiting, one precise RUN pin threshold, one external VCC input, and one thermal shutdown. The LTC3130/-1 combines characteristics such as a small external component, wide operating voltage range, small package, and ultra-low standby current, making it ideal for the following always-on applications where long battery life is a critical feature: long-life battery-powered instrumentation, portable military radios, low-power sensors, and solar panel post-regulator/charger circuits.

The LTC3130 and LTC3130-1 are available in thermally hardened 20-lead 3mm x 4mm QFN and 16-lead MSOP packages. The E- and I-grade devices have an operating temperature range specification of –40°C to 125°C. Pricing for the E-grade products starts at $3.35 per unit for both packages in 1,000-piece quantities.