The LTC®3441 is a high efficiency, fixed frequency, buck-boost DC/DC converter that operates efficiently from input voltages above, below or equal to the output voltage. The topology incorporated in the IC provides a continuous trans- fer function through all operating modes, making the prod- uct ideal for single lithium ion or multicell applications where the output voltage is within the battery voltage range. The device includes two 0.10Ω N-channel MOSFET switches and two 0.11Ω P-channel switches. External Schottky diodes are optional, and can be used for a moderate efficiency improvement. The operating frequen- cy is 1MHz, and can be synchronized via external components. The device features a ≤25µA quiescent current, which allows true output disconnect in standby mode. The device is available in a thermally enhanced 12-lead (4mm × 3mm) DFN package.
The LTC3441 is a high‑efficiency, fixed‑frequency buck‑boost DC/DC converter that can operate with input voltages above, below, or equal to the output voltage. It delivers up to 1.2 A continuous output current and features a 25 µA quiescent current in Burst Mode.
Typical applications include handheld computers, MP3 players, digital cameras and other portable devices. The device is supplied in a 12‑lead plastic DFN package (4 mm × 3 mm) and includes internal MOSFET switches, optional Schottky diodes, and a synchronizable 1 MHz oscillator.
| Output Voltage Adjust Range | 2.4‑5.25 V |
|---|---|
| Frequency Accuracy | 0.85‑1.415 MHz |
The device operates from 2.4 V to 5.5 V input.
Burst Mode is enabled by driving the MODE/SYNC pin high.
It is supplied in a 12‑lead plastic DFN package measuring 4 mm × 3 mm.