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2022-09-24 23:33:15
LM3350MM - Switched Capacitor Voltage Converter
The LM3350 is a CMOS charge pump voltage converter that effectively provides a 3.3V to 5V step, or 5V to 3.3V step-down. The LM3350 uses four small, low-cost capacitors to provide voltage translation. It eliminates cost, size, and radiation-related EMI, or power losses in inductor-based circuit linear regulators. Operating power conversion efficiency is greater than 90%, providing ideal performance for battery-powered portable systems. The architecture provides a fixed voltage conversion ratio of 3/2 or 2/3. Therefore, it can be used for other DC-DC conversions as well.
Main Specifications
The 800 kHz switching frequency allows the use of very small, inexpensive capacitors.
4.2W typical boost output impedance
1.8W Typical Buck Output Impedance
90% typical power conversion efficiency of 50mA
250 nA typical shutdown current
Features
3.3V to 5V conversion, or 5V to 3.3V
Small mini SO-8 package without inductance
Application in any mixed 5V and 3.3V system laptops and PDAs
PCMCIA Card for Handheld Instruments