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LM3354MM-1.8 数据表(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部件名 LM3354MM-1.8
功能描述  Regulated 90mA Buck-Boost Switched Capacitor DC/DC Converter
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制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
标志 NSC - National Semiconductor (TI)

LM3354MM-1.8 数据表(HTML) 1 Page - National Semiconductor (TI)

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LM3354
Regulated 90mA Buck-Boost Switched Capacitor DC/DC
Converter
General Description
The LM3354 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 LM3354 is available with standard output voltages of
1.8V, 3.3V, 4.1V (ideal for white LED applications), and 5.0V.
If other output voltage options between 1.8V and 5.0V are
desired, please contact your National Semiconductor repre-
sentative.
The LM3354’s proprietary buck-boost architecture enables
up to 90mA of load current at an average efficiency greater
than 75%. Typical operating current is only 375 µA and the
typical shutdown current is only 2.3 µA.
The LM3354 is available in a 10-pin MSOP package. This
package has a maximum height of only 1.1 mm.
The high efficiency of the LM3354, 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.
See the LM3352 for up to 200mA of output current or the
LM3355 for up to 50mA of output current.
Features
n
Regulated V
OUT with ±3% (5.0V, 4.1V, and 3.3V
options) or ±4% (1.8V option) accuracy
n
Standard output voltages of 1.8V, 3.3V, 4.1V, and 5.0V
n
Custom output voltages available from 1.8V to 5.0V in
100 mV increments with volume order
n
2.5V to 5.5V input voltage range
n
Up to 90mA (5.0V, 4.1V, and 1.8V options) or 70mA
(3.3V option) output current
n >
75% average efficiency
n
Uses few, low-cost external components
n
Very small solution size
n
375 µA typical operating current
n
2.3 µA typical shutdown current
n
1 MHz typical switching frequency
n
Architecture and control methods provide high load
current and good efficiency
n
MSOP-10 package
n
Over-temperature protection
Applications
n
White LED display backlights
n
1-cell Lilon battery-operated equipment including PDAs,
hand-held PCs, cellular phones
n
Flat panel displays
n
Hand-held instruments
n
Li-Ion, NiCd, NiMH, or alkaline battery powered systems
Typical Operating Circuit
DS200188-1
February 2002
© 2002 National Semiconductor Corporation
DS200188
www.national.com


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