Boost converter with a 900 mA switch in a 10-WFDFN package
The Texas Instruments TPS61093DSKR is a step-up (boost) DC-DC converter with a 900 mA integrated switch, designed to generate an adjustable output up to 17 V from a low-voltage input source as low as 1.6 V. Switching at a fixed 1.2 MHz, it uses a small inductor and ceramic capacitors to keep the solution footprint compact — a common choice for space-constrained portable or battery-backed rails.
Input voltage range and output headroom
The input range spans 1.6 V to 6 V, so a single Li-Ion cell (3.0 V to 4.2 V), two or three alkaline cells, or a regulated 3.3 V / 5 V rail all fit within the operating envelope. With the output adjustable from 1.6 V up to 17 V, this converter can generate 12 V bias rails, 5 V from a lower battery voltage, or drive a string of white LEDs — the 17 V ceiling gives enough headroom for a 3- or 4-series LED chain.
Switching frequency and external component sizing
The 1.2 MHz switching frequency places the fundamental ripple in the low-MHz band, allowing the use of small-value inductors (typically 4.7 µH to 10 µH) and ceramic output capacitors that keep the total BOM area small. Because the part does not use synchronous rectification (external Schottky diode required), the rectifier forward drop adds to the conduction loss — a 0.4 V to 0.5 V Schottky works well at this voltage and current level.
The small footprint (2.5 mm x 2.5 mm) suits portable and space-limited designs, but the pad clearance and via placement under the package need care during layout.
Active lifecycle — no last-time-buy risk
It can be specified for new production builds without a last-time-buy clock, and the base product number TPS61093 remains in the TI portfolio. For dual-sourcing or supply-resilience planning, there is no official second-source pin-compatible alternate from another manufacturer listed on this record.