National Semi Intros LM3352 Regulated 200mA DC/DC Voltage ConverterMarch 21, 1999 by Jeff Shepard
The new LM3352 regulated 200mA dc/dc voltage converter from National Semiconductor Corp. (Santa Clara, CA) is claimed to be the industry's high-efficiency buck/boost switched capacitor voltage regulator. According to National Semiconductor, the device offers a high-efficiency alternative to LDO regulators and enables users to take advantage of the full capacity of lithium-ion batteries. The LM3352 offers higher than 80 percent average efficiency while providing a constant 3.3V output voltage over the complete discharge cycle of a lithium-ion battery pack. Multiple fractional gain modes provide a regulated output voltage between 1.8V and 4V from an input voltage between 2.5V and 5.5V. Output voltages of 2.5V, 3.0V and 3.3V are offered to match industry-standard voltage requirements; non-standard output options between 1.8V and 4.0V in 100mV increments are also available. The LM3352MTC is priced at $2.75 each in 1,000-piece quantities.