LM3351 - Switched Capacitor Voltage Converter [Life-time buy]
Datasheet Packaging Samples & Pricing Reliability Application Notes Knowledge Base

Features
Conversion of 3.3V to 5V, or 5V to 3.3V
200 kHz switch frequency allows use of very small, inexpensive capacitors.
4.2 typical step-up output impedance
1.8 typical step-down output impedance
95% typical power conversion efficiency at 50 mA
250 nA typical shutdown current
No inductor required
Low quiescent current extends battary life
Small Mini SO-8 package

General Description


The LM3351 is a CMOS charge-pump voltage converter which efficiently provides a 3.3V to 5V step-up, or 5V to 3.3V step-down. More...


Applications


Any mixed 5V and 3.3V system
Laptop computers and PDAs
Handheld instrumentation
PCMCIA cards
  Typical Application
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Typical Performance


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LM3351

 
2.20 <=
V in Lower
 V
 
<=
V in Upper
 V
 
<= 5.50
V out 1.47 <=  V <= 5.47
I out    A <= 0.05
Ambient Temperature  °C <= 100


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Additional Resources
Application Notes


Connection Diagram


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Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LM3351 Switched Capacitor Voltage Converter 298
Kbytes
20-Oct-04 Download
LM3351 Switched Capacitor Voltage Converter (Japanese)
137 Kbytes   Download

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Package Availability, Models, Samples & Pricing
Part NumberPackageFactory Lead TimeModelsSamples &
Electronic
Orders
Budgetary PricingStd
Pack
Size
Package
Marking
Format
TypePinsSpec.MSL
Rating
Peak
Reflow
RoHS
Report
CAD
Symbols
WeeksQtyQty$US each
LM3351MMMINI SOIC8NOPB
STD
1
1
260
260
RoHS Download Lifetime buyN/A
 
Buy Now
1K+$0.76reel
of
1000
ZXTT
S05A
6 weeks3000
LM3351MMXMINI SOIC8NOPB1260RoHS Download Lifetime buyN/A
 
Buy Now
1K+$0.76reel
of
3500
ZXTT
S05A
6 weeks40000

Obsolete Versions

Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
LM3351MM
NONE
NONE
30 Nov 2009
LM3351MMX
NONE
NONE
30 Nov 2009

General Description


The LM3351 is a CMOS charge-pump voltage converter which efficiently provides a 3.3V to 5V step-up, or 5V to 3.3V step-down. The LM3351 is pin for pin compatible with the LM3350 but consumes 66% less quiescent current. The LM3351 uses four small, low cost capacitors to provide the voltage conversion. It eliminates the cost, size and radiated EMI related to inductor based circuits, or the power loss of a linear regulator. Operating power conversion efficiency greater than 90% provides ideal performance for battery powered portable systems.

The architecture provides a fixed voltage conversion ratio of 3/2 or 2/3. Thus it can be used for other DC-DC conversions as well.

Reliability Metrics


Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM3351MMCS0800305350028105002797458048
LM3351MMXCS0800305350028105002797458048

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.


Application Notes


TitleSize in Kbytes Date Click link below to Download
AN-1142: Application Note 1142 LM2661/3/4 Evaluation Board 186
Kbytes
4-Oct-04 Download

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More Application Notes


TitleSize in Kbytes Date Click link below to Download
AN-225: Application Note 225 IC Temperature Sensor Provides Thermocouple Cold-Junction Compensation 89
Kbytes
2-Oct-02 Download
AN-1214: Application Note 1214 LM3354/5 Evaluation Board 167
Kbytes
10-May-04 Download
AN-272: Application Note 272 Op Amp Booster Designs 382
Kbytes
2-Oct-02 Download
AN-295: Application Note 295 A High Performance Industrial Weighing System 117
Kbytes
4-Oct-04 Download
AN-298: Application Note 298 Isolation Techniques for Signal Conditioning 379
Kbytes
2-Oct-02 Download
AN-286: Application Note 286 Applications of the LM392 Comparator Op Amp IC 135
Kbytes
2-Oct-02 Download
AN-1144: Application Note 1144 Maximizing Start-up Loads with the LM3352 Regulated Buck/Boost Switched Capacitor Converter 62
Kbytes
4-Oct-04 Download
AN-1251: Application Note 1251 Switched Capacitor Circuits Provide Efficient and Functional White LED Drive 55
Kbytes
26-Sep-02 Download

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[Information as of 8-Nov-2009]