LM2623MMX ,General Purpose, Gated Oscillator Based, DC/DC Boost Converterapplications, the LM2623n .8V to 14V Operating Voltageallows the designer to vary the output voltag ..
LM2623MMX ,General Purpose, Gated Oscillator Based, DC/DC Boost ConverterFeaturesn Good Efficiency Over a Very Wide Load RangeThe LM2623 is a high efficiency, general purpo ..
LM2623MMX/NOPB ,General Purpose, Gated Oscillator Based, DC/DC Boost Converter 8-VSSOP -40 to 85Block Diagram..... 711.7 Glossary. 147.3 Feature Description...... 712 Mechanical, Packaging, And O ..
LM2630MTC-ADJ ,Synchronous Step-Down Voltage Regulator [Not recommended for new designs]Applicationstures include the external synchronization pin, and then Notebook and subnotebook compu ..
LM2631MTC-ADJ ,Synchronous Step-Down Voltage Regulator [Not recommended for new designs]Electrical Characteristics=Specifications in standard type face are for T 25˚C and those with boldf ..
LM2631MTCX-ADJ ,Synchronous Step-Down Voltage Regulator [Not recommended for new designs]Featuresn 4.5V to 30V input rangeThe LM2631 controller provides all the active functions forstep-do ..
LM4897MM ,1.1 Watt Audio Power Amplifier with Fade-In and Fade-OutElectrical Characteristics V = 5.0V (Notes 1, 2)DDThe following specifications apply for the circui ..
LM4898 ,1 Watt Fully Differential Audio Power Amplifier With Shutdown SelectFeaturesprovide high quality output power with a minimal amount ofexternal components. The LM4898 d ..
LM4898ITL ,1 Watt Fully Differential Audio Power Amplifier With Shutdown Selectfeatures an internal thermaln Shutdown high or low selectivityshutdown protection mechanism.The LM4 ..
LM4898ITLX ,1 Watt Fully Differential Audio Power Amplifier With Shutdown SelectFeaturesprovide high quality output power with a minimal amount ofexternal components. The LM4898 d ..
LM4898LD ,1 Watt Fully Differential Audio Power Amplifier With Shutdown SelectLM4898 1 Watt Fully Differential Audio Power Amplifier With Shutdown SelectJuly 2003LM48981 Watt Fu ..
LM4898LDX ,1 Watt Fully Differential Audio Power Amplifier With Shutdown Selectfeatures a low-power consumption shutdownn Improved pop & click circuitry eliminates noises duringm ..
LM2623ALD-LM2623AMM-LM2623AMMX-LM2623LD-LM2623LDX-LM2623MM-LM2623MMX
General Purpose, Gated Oscillator Based, DC/DC Boost Converter
LM2623
General Purpose, Gated Oscillator Based, DC/DC Boost
Converter
General DescriptionThe LM2623isa high efficiency, general purpose, step-up
DC-DC switching regulatorfor battery-powered and lowin-
put voltage systems.It acceptsan input voltage between.8
and14 volts and convertsit intoa regulated output voltage
between 1.24 and14 volts. Efficienciesupto 90% are
achievable withthe LM2623. orderto adapttoa numberof applications, the LM2623
allowsthe designerto varythe output voltage,the operating
frequency (300kHzto2 MHz) and duty cycle (17%to 90%) optimizethe part’s performance. The selected values can fixedor can vary with battery voltageor inputto output
voltage ratio. The LM2623 usesa very simple, on/off regu-
lation modeto produce good efficiency and stable operation
overa wide operating range.It normally regulatesby skip-
ping switching cycles whenit reaches the regulation limit
(Pulse Frequency Modulation).
Note: Please read the "Non-Linear Effect" and "Choosing
The CorrectC3 Capacitor" sub-sectionsof the Design Pro-
cedure sectionof this data sheet,so that any challenges with
designing with this part canbe taken into account beforea
board design/layoutis finalized.
For Alternative Solutions, See Also: LM2700, LM2622,
LM2731, LM2733, and LM2621.
Features Good Efficiency Overa Very Wide Load Range Very Low Output Voltage Ripple Small, Mini-SO-8 Package (Halfthe Footprintof
Standard8pin SO Package) 1.09 mm Package Height Upto2 MHz Switching Frequency .8Vto 14V Operating Voltage 1.1V Start-up Voltage 1.24V- 14V Adjustable Output Voltage Upto2A Load Currentat low Output Voltages 0.17Ω Internal MOSFET Upto 90% Regulator Efficiency80µA Typical Operating Current (into VDDpinof supply) <2.5µA Guaranteed Supply CurrentIn Shutdown 4mmx 4mm Thermally Enhanced LLP Package Option
Applications Cameras, Pagers and Cell Phones PDAs,Palmtop Computers, GPS devices White LED Drive, TFTor Scanned LCDs Flash Memory Programming Hand-Held Instruments1,2,3or4 Cell Alkaline Systems1,2or3 Cell Lithium-ion Systems
Typical Application CircuitJanuary 2004
LM2623
General
Purpose,
Gated
Oscillator
Based,
DC/DC
Boost
Converter
