The LTC3204-3.3/LTC3204-5/LTC3204B-3.3/LTC3204B-5 are low noise, constant frequency (1.2MHz) switched capacitor voltage doublers. The LTC3204-3.3/ LTC3204B-3.3 can produce a regulated output voltage of 3.3V from a minimum input voltage of 1.8V (2 alkaline cells) whereas the LTC3204-5/LTC3204B-5 can produce 5V from a minimum of 2.7V (Li-Ion battery) input. LTC3204-3.3/LTC3204-5 feature automatic Burst Mode® operation at light loads to maintain low supply current whereas LTC3204B-3.3/LTC3204B-5 feature constant frequency operation at any load. Built-in soft-start circuitry prevents excessive inrush current during start-up. Thermal shutdown and current-limit circuitry allow the parts to survive a continuous short-circuit from VOUT to GND. High switching frequency minimizes overall solution footprint by allowing the use of tiny ceramic capaci-tors. In shutdown, the load is disconnected from the input and the quiescent current is reduced to <1µA. The LTC3204-3.3/LTC3204-5/LTC3204B-3.3/LTC3204B-5 are available in a low profile (0.75mm) 6-lead 2mm × 2mm DFN package. *Protected by U.S. Patents including 6411531.
- Fixed 3.3V or 5V outputs
- VIN range
- 1.8V to 4.5V (LTC3204-3.3/LTC3204B-3.3)
- 2.7V to 5.5V (LTC3204-5/LTC3204B-5)
- Output current
- Up to 150mA (LTC3204-5/LTC3204B-5)
- Up to 50mA (LTC3204-3.3/LTC3204B-3.3)
- Automatic burst mode® operation with IQ = 48µA (LTC3204-3.3/LTC3204-5)
- Constant frequency operation at all loads (LTC3204B-3.3/LTC3204B-5)
- Low noise constant frequency (1.2MHz) operation*
- Built-in soft-start reduces inrush current
- Shutdown disconnects load from input
- Shutdown current <1µA
- Short-circuit/thermal protection
- Available in low profile 6-Lead DFN package
- Operating temp.: -40 to +85°C
- For full details please refer to data sheet
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