LM3350MM ,Switched Capacitor Voltage ConverterPin DescriptionPin Name Function1 Cap1+ Positive terminal for the first chargepump capacitor.2 Cap1 ..
LM3350MMX ,Switched Capacitor Voltage ConverterElectrical Characteristics3/2 Step-Up Voltage ConverterSpecifications in standard type face are for ..
LM3351MM ,Switched Capacitor Voltage ConverterPin DescriptionPin Name Function1 Cap1+ Positive terminal for the first chargepump capacitor.2 Cap1 ..
LM3351MMX ,Switched Capacitor Voltage ConverterElectrical Characteristics3/2 Step-Up Voltage ConverterSpecifications in standard type face are for ..
LM3352MTC-2.5 ,Regulated 200mA Buck-Boost Switched Capacitor DC/DC ConverterFeaturesn Regulated V with ±3% accuracyThe LM3352 is a CMOS switched capacitor DC/DC con- OUTverter ..
LM3352MTC-3.0 ,Regulated 200mA Buck-Boost Switched Capacitor DC/DC ConverterPin DescriptionPin Number Name Function1 GND Ground*2 C3− Negative Terminal for C33 C3+ Positive Te ..
LMD18200T/NOPB ,3A, 55V H-Bridge 11-TO-220 -40 to 125electrical specifications do notapply when operating the device beyond its rated operating conditio ..
LMD18200T/NOPB ,3A, 55V H-Bridge 11-TO-220 -40 to 125FEATURES APPLICATIONS2• Delivers Up to 3A Continuous Output • DC and Stepper Motor Drives• Operates ..
LMD18201T ,3-Amp, 55 Volt H-BridgeFeaturesn Numerically controlled machineryn Delivers up to 3A continuous outputn Computer printers ..
LMD18201T/NOPB ,3-Amp, 55 Volt H-Bridge 11-TO-220 -40 to 125Electrical CharacteristicsThe following specifications apply for V = 42V, unless otherwise specifie ..
LMD18245 ,3A, 55V DMOS Full-Bridge Motor DriverFeaturesYDMOS power stage rated at 55V and 3A continuousThe LMD18245 full-bridge power amplifier in ..
LMD18245 ,3A, 55V DMOS Full-Bridge Motor DriverApplicationsstructure eliminates the discrete diodes typically required toYclamp bipolar power stag ..
LM3350MM-LM3350MMX
Switched Capacitor Voltage Converter
LM3350
Switched Capacitor Voltage Converter
General DescriptionThe LM3350isa CMOS charge-pump voltage converter
which efficiently providesa 3.3Vto5V step-up,or5Vto 3.3V
step-down. The LM3350 uses four small, low cost capacitors providethe voltage conversion.It eliminatesthe cost, size
and radiated EMI relatedto inductor based circuits,or the
power lossofa linear regulator. Operating power conversion
efficiency greater than 90% provides ideal performancefor
battery powered portable systems.
The architecture providesa fixed voltage conversion ratioof
3/2or 2/3. Thusit canbe usedfor other DC-DC conversions well.
Features Conversionof 3.3Vto 5V,or5Vto 3.3V 4.2Ω typical step-up output impedance 1.8Ω typical step-down output impedance 90% typical power conversion efficiencyat50 mA 800 kHz switch frequency allows useof very small,
inexpensive capacitors. No inductor required 250nA typical shutdown current Small Mini SO-8 package
Applications Any mixed5V and 3.3V system Laptop computers and PDAs Handheld instrumentation PCMCIA cards
Basic Operating Circuits
Step-Up Converter Step-Down Converter10000201 10000202
December 1999
LM3350
Switched
Capacitor
oltage
Converter
