LM3352  Product Folder

The LM3352 is a CMOS switched capacitor DC/DC converter that produces a regulated output voltage by automatically stepping up (boost) or stepping down (buck) the input voltage. It accepts an input voltage between 2.5V and 5.5V. The LM3352 is available in three standard output voltage versions: 2.5V, 3.0V and 3.3V. If other output voltage options between 1.8V and 4.0V are desired, please contact your National Semiconductor representative.

The LM3352's proprietary buck-boost architecture enables up to 200 mA of load current at an average efficiency greater than 80%. Typical operating current is only 400 µA and the typical shutdown current is only 2.5 µA.

The LM3352 is available in a 16-pin TSSOP package. This package has a maximum height of only 1.1 mm.

The high efficiency of the LM3352, low operating and shutdown currents, small package size, and the small size of the overall solution make this device ideal for battery powered, portable, and hand-held applications.

• Regulated V_OUT with ±3% accuracy
• Standard output voltage options: 2.5V, 3.0V and 3.3V
• Custom output voltages available from 1.8V to 4.0V in 100 mV increments
• 2.5V to 5.5V input voltage
• Up to 200 mA output current
• >80% average efficiency
• Uses few, low-cost external components
• Very small solution size
• 400 µA typical operating current
• 2.5 µA typical shutdown current
• 1 MHz switching frequency (typical)
• Architecture and control methods provide high load current and good efficiency
• TSSOP-16 package
• Over-temperature protection

• 1-cell Lilon battery-operated equipment including PDAs, hand-held PCs, cellular phones
• Flat panel displays
• Hand-held instruments
• NiCd, NiMH, or alkaline battery powered systems
• 3.3V to 2.5V and 5.0V to 3.3V conversion