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LM3352MTC-3.0 Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. LM3352MTC-3.0
Description  Regulated 200 mA Buck-Boost Switched Capacitor DC/DC Converter
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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LM3352
Regulated 200 mA Buck-Boost Switched Capacitor
DC/DC Converter
General Description
The LM3352 is a CMOS switched capacitor DC/DC con-
verter that produces a regulated output voltage by automati-
cally 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 Na-
tional 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 shut-
down currents, small package size, and the small size of the
overall solution make this device ideal for battery powered,
portable, and hand-held applications.
Features
n Regulated VOUT with ±3% accuracy
n Standard output voltage options: 2.5V, 3.0V and 3.3V
n Custom output voltages available from 1.8V to 4.0V in
100 mV increments
n 2.5V to 5.5V input voltage
n Up to 200 mA output current
n >80% average efficiency
n Uses few, low-cost external components
n Very small solution size
n 400 µA typical operating current
n 2.5 µA typical shutdown current
n 1 MHz switching frequency (typical)
n Architecture and control methods provide high load
current and good efficiency
n TSSOP-16 package
n Over-temperature protection
Applications
n 1-cell Lilon battery-operated equipment including PDAs,
hand-held PCs, cellular phones
n Flat panel displays
n Hand-held instruments
n NiCd, NiMH, or alkaline battery powered systems
n 3.3V to 2.5V and 5.0V to 3.3V conversion
Typical Operating Circuit
DS101037-1
September 1999
© 1999 National Semiconductor Corporation
DS101037
www.national.com




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