Synchronous buck-boost DC/DC converter regulates output voltage above, below, or equal to the input. The device operates from a 2.42 V to 15 V input range at start-up and from 1.92 V to 15 V after start-up when bootstrapped. It provides eight pin-selectable fixed output voltages from 2.5 V to 15 V and supports 200 mA output current in buck mode. Burst Mode operation reduces quiescent current to 1.3 µA, while PWM operation switches at 1.2 MHz. The converter includes programmable maximum power point control, a power-good output, soft-start, thermal shutdown, and thermally enhanced QFN or MSOP packaging.
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| Topology | Synchronous buck-boost DC/DC converter |
| Input voltage range at start-up | 2.42 to 15V |
| Input voltage range after start-up | 1.92 to 15V |
| Fixed output voltage settings | 2.5, 3.3, 4.1, 5.0, 6.9, 8.2, 12, 15V |
| Output current in buck mode | 200mA |
| Quiescent current in Burst Mode | 1.3 typ, 2.0 maxµA |
| Shutdown current | 10 typ, 100 maxnA |
| Switching frequency | 1.2 typMHz |
| Maximum efficiency | 95% |
| Inductor average current limit | 275 typmA |
| Inductor peak current limit | 500 typmA |
| MPPC voltage | 1.175 typV |
| RUN threshold to enable switching | 1.22 typV |
| Soft-start time | 3ms |
| Power-good falling threshold | -7.5 typ referenced to programmed output voltage% |
| N-channel switch on-resistance | 0.75 typΩ |
| Operating junction temperature range | -40 to 125°C |
| Package options | 16-lead 3 mm × 3 mm QFN; 16-lead MSOP |
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