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LM2623MM/NOPB |LM2623MMNOPBNSCN/a2500avaiGeneral Purpose, Gated Oscillator Based, DC/DC Boost Converter 8-VSSOP -40 to 85
LM2623MMX/NOPB |LM2623MMXNOPBNSC N/a500avaiGeneral Purpose, Gated Oscillator Based, DC/DC Boost Converter 8-VSSOP -40 to 85


LM2623MM/NOPB ,General Purpose, Gated Oscillator Based, DC/DC Boost Converter 8-VSSOP -40 to 85Features 3 DescriptionThe LM2623 is a high-efficiency, general-purpose,1• Good Efficiency Over a Ve ..
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 ..
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LM2623MM/NOPB-LM2623MMX/NOPB
General Purpose, Gated Oscillator Based, DC/DC Boost Converter 14-WSON -40 to 85
4.7pF
4.7PH
FREQ
PGND
SGND
BOOT
RF2
100k
22PFIN
2 Cells
150k
RF1
300k
VDD C2
100PF
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LM2623

SNVS188I –MAY 2004–REVISED OCTOBER 2017
LM2623 General-Purpose, Gated-Oscillator-Based DC-DC Boost Converter Features
Good Efficiency Overa Very Wide Load Range Very Low Output Voltage Ripple Upto 2-MHz Switching Frequency 0.8-Vto 14-V Operating Voltage 1.1-V Start-up Voltage 1.24-Vto 14-V Adjustable Output Voltage Upto 2-A Load Currentat Low Output Voltages 0.17-Ω Internal MOSFET Upto 90% Regulator Efficiency 80-µA Typical Operating Current (Into VDD Pinof
Supply) < 2.5-µA Ensured Supply CurrentIn Shutdown Small 8-Pin VSSOP Package (Half the Footprint Standard 8-Pin SOIC Package); 1.09-mm
Package Height 4-mm× 4-mm Thermally Enhanced WSON
Package Option Applications Cameras, Pagers and Cell Phones PDAs, Palmtop Computers, GPS devices White LED Drive, TFT,or Scanned LCDs Flash Memory Programming Hand-Held Instruments 1,2,3,or4 Cell Alkaline Systems 1,2,or3 Cell Lithium-ion Systems Description
The LM2623isa high-efficiency, general-purpose,
step-up DC-DC switching regulator for battery-
powered and low input voltage systems.It acceptsan
input voltage between 0.8V and14V and convertsit
intoa regulated output voltage between 1.24V andV. Efficiencies upto 90% are achievable with the
LM2623. orderto adapttoa numberof applications, the
LM2623 allows the designer to vary the output
voltage, the operating frequency (300 kHzto2 MHz)
and duty cycle (17%to 90%)to optimize the part's
performance. The selected values canbe fixedor can
vary with battery voltageor inputto output voltage
ratio. The LM2623 usesa very simple, on/off
regulation mode to produce good efficiency and
stable operation overa wide operating range.It
normally regulatesby skipping switching cycles when reaches the regulation limit (Pulse Frequency
Modulation).
Note: See Non-Linear Effect and Choosing The
Correct C3 Capacitor so that any challenges with
designing with this part can be taken into account
beforea board design/layoutis finalized.
For alternative solutions, See Also: LM2700, LM2622,
LM2731, LM2733, and LM2621.
Device Information(1)

(1) Forall available packages, see the orderable addendumat
the endofthe data sheet.
Typical Application Circuit
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