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LM2681

Features: ·Doubles or Splits Input Supply Voltage·SOT23-6 Package·15W Typical Output Impedance·90% Typical Conversion Efficiency at 20 mAApplication·Cellular Phones·Pagers·PDAs·Operational Amplifier Power Suppliers·Interface Power Suppliers·Handheld InstrumentsSpecificationsIf Military/Aerospace s...

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SeekIC No. : 004394995 Detail

LM2681: Features: ·Doubles or Splits Input Supply Voltage·SOT23-6 Package·15W Typical Output Impedance·90% Typical Conversion Efficiency at 20 mAApplication·Cellular Phones·Pagers·PDAs·Operational Amplifier...

LM2681 Data Sheet

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Part Number:
LM2681
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/8/13

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Product Details

Description



Features:

·Doubles or Splits Input Supply Voltage
·SOT23-6 Package
·15W Typical Output Impedance
·90% Typical Conversion Efficiency at 20 mA




Application

·Cellular Phones
·Pagers
·PDAs
·Operational Amplifier Power Suppliers
·Interface Power Suppliers
·Handheld Instruments




Specifications

If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage (V+ to GND, or GND to OUT).......... 5.8V
V+ and OUT Continuous Output Current ............30 mA
Output Short-Circuit Duration to GND (Note 2) ....1 sec.
Continuous Power............................................600 mW
Dissipation (TA = 25)(Note 3)
TJMax(Note 3) .....................................................150
JA (Note 3) ...................................................210/W
Operating Junction Temperature............−40 to 85
Range
Storage Temperature Range ............−65 to +150
Lead Temp. (Soldering, 10 seconds) .................300
ESD Rating ...........................................................2kV

Output Current 20 mA
Input Min Voltage 2.5 Volt
Input Max Voltage 5.5 Volt
Switching Frequency 160 kHz
On/Off Pin No
Efficiency (peak) 90 %
Error Flag No
Sync Pin No
Adj Switch Frequency No
Adjustable Output No
Inverting No
Step-Up Yes
Step-Down Yes
RegType Switched Capacitor
Temperature Min -40 deg C
Temperature Max 85 deg C
Topology Charge Pump
View Using Catalog





Description

The LM2681 CMOS charge-pump voltage converter operates as a voltage doubler for an input voltage in the range of +2.5V to +5.5V. Two low cost capacitors and a diode (needed during start-up) is used in this circuit to provide up to 20 mA of output current. The LM2681 can also work as a voltage divider to split a voltage in the range of +1.8V to +11V in half.

The LM2681 operates at 160 kHz oscillator frequency to reduce output resistance and voltage ripple. With an operating current of only 550 A (operating efficiency greater than 90% with most loads) the LM2681 provides ideal performance for battery powered systems. The device is in SOT-23-6 package.



The LM2681 CMOS charge-pump voltage converter operates as a voltage doubler for an input voltage in the range of +2.5V to +5.5V. Two low cost capacitors and a diode (needed during start-up) is used in this circuit to provide up to 20 mA of output current. The LM2681 can also work as a voltage divider to split a voltage in the range of +1.8V to +11V in half.

The LM2681 operates at 160 kHz oscillator frequency to reduce output resistance and voltage ripple. With an operating current of only 550 µA (operating efficiency greater than 90% with most loads) the LM2681 provides ideal performance for battery powered systems. The device is in SOT-23-6 package.

Reliability Metrics

Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM2681M6 ABCD150 0 31520 0 0 3739000 1 1060951459
LM2681M6X ABCD150 0 31520 0 0 3739000 1 1060951459

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.







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