LTC3335
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LTC3335

Nanopower Buck-Boost DC/DC with Integrated Coulomb Counter

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Linduino LTC3335 - DC2343A.ino Download 17.00KB Linduino LTC3335 - Linduino.CPP File Download 20.00KB Linduino LTC3335_Config.h Download 9.00KB Linduino LTC3335_Correction_Tables.cpp Download 37.00KB Linduino LTC3335 - Linduino Header File Download 15.00KB
Part Models 4
1ku List Price Starting From $4.01
Features
  • 680nA Input Quiescent Current (Output in Regulation at No Load)
  • 1.8V to 5.5V Input Operating Range
  • Selectable Output Voltages of 1.8V, 2.5V, 2.8V, 3V, 3.3V, 3.6V, 4.5V, 5V
  • Integrated Coulomb Counter Measures Accumulated Battery Discharge
  • ±5% Battery Discharge Measurement Accuracy
  • Programmable Peak Input Current of 5mA, 10mA, 15mA, 25mA, 50mA, 100mA, 150mA, 250mA
  • Up to 50mA of Output Current
  • Up to 90% Efficiency
  • Programmable Coulomb Counter Prescaler for Wide Range of Battery Sizes
  • Programmable Discharge Alarm Threshold
  • I2C Interface
  • Low Profile (0.75mm) 20-Lead (3mm × 4mm) QFN Package
Additional Details
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The LTC3335 is a high efficiency, low quiescent current (680nA) buck-boost DC/DC converter with an integrated precision coulomb counter which monitors accumulated battery discharge in long life battery powered applications. The buck-boost can operate down to 1.8V on its input and provides eight pin-selectable output voltages with up to 50mA of output current.

The coulomb counter stores the accumulated battery discharge in an internal register accessible via an I2C interface. The LTC3335 features a programmable discharge alarm threshold. When the threshold is reached, an interrupt is generated at the IRQ pin.

To accommodate a wide range of battery types and sizes, the peak input current can be selected from as low as 5mA to as high as 250mA and the full-scale coulomb counter has a programmable range of 32,768:1.

The LTC3335 is available in a 3mm × 4mm QFN-20 package.

Applications

  • Long Lifetime Primary Cell Battery Applications
  • Wireless Sensors
  • Remote Monitors
  • Dust Networks® SmartMesh® Applications
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file View Data Sheet
Documentation View All Documentation
Linduino LTC3335 - DC2343A.ino Download 17.00KB Linduino LTC3335 - Linduino.CPP File Download 20.00KB Linduino LTC3335_Config.h Download 9.00KB Linduino LTC3335_Correction_Tables.cpp Download 37.00KB Linduino LTC3335 - Linduino Header File Download 15.00KB
Part Models 4
1ku List Price Starting From $4.01
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LTC3335

Documentation

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Data Sheet

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UPDATED 08/28/2015
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LTC3335: Nanopower Buck-Boost DC/DC with Integrated Coulomb Counter Data Sheet

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UPDATED 09/20/2016
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LTC3335: クーロン・カウンタを内蔵したナノパワー昇降圧DC/DCコンバータ データシート

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UPDATED 07/11/2016
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Nanopower IoT Power Supply Accurately Monitors Battery Discharge redirect icon

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UPDATED 08/18/2016
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Efficient Low Power Conversion ICs Enhance Wearables, Better the Human Condition redirect icon

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UPDATED 07/11/2016
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Know a Battery’s State-of-Charge By Counting Coulombs redirect icon

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UPDATED 01/14/2016
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通过计算库伦量确定电池充电状态 redirect icon

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DC2343A - Demo Manual redirect icon

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Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC3335EUDC#PBF 20-Lead QFN (3mm x 4mm x 0.75mm w/ EP) external-link
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  • Material Declaration external-link
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LTC3335EUDC#TRPBF 20-Lead QFN (3mm x 4mm x 0.75mm w/ EP) external-link
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  • Material Declaration external-link
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LTC3335IUDC#PBF 20-Lead QFN (3mm x 4mm x 0.75mm w/ EP) external-link
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LTC3335IUDC#TRPBF 20-Lead QFN (3mm x 4mm x 0.75mm w/ EP) external-link
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Software & Part Ecosystem

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Evaluation Kits 1

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DC2343A

LTC3335 Demo Board | 680nA Iq Buck-Boost with Coulomb Counter, 1.8V ≤ VIN ≤ 5.5V, VOUT = 1.8V to 5V @ 15mA

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DC2343A

LTC3335 Demo Board | 680nA Iq Buck-Boost with Coulomb Counter, 1.8V ≤ VIN ≤ 5.5V, VOUT = 1.8V to 5V @ 15mA

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DC2343A
LTC3335 Demo Board | 680nA Iq Buck-Boost with Coulomb Counter, 1.8V ≤ VIN ≤ 5.5V, VOUT = 1.8V to 5V @ 15mA
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Product Detail

Demonstration circuit DC2343A is a complete system level solution for a nanopower buck-boost DC/DC with integrated coulomb counter. The DC2343A contains a PIC16F1459 embedded processor for communication to the PC over USB and the LTC3335 via its I2C port. The GUI is capable of reading and writing all the control registers on the LTC3335 as well as displaying and resetting all its alarm registers. The firmware and software for the embedded system and the GUI are available at the LTC3335 solutions page. The DC2343A uses two analog-to-digital converter channels to sample the battery and output voltages. The voltage samples improve the functionality of the GUI, and allow optimal software correction to the measured coulombs. By adding the software correction the first order known errors are compensated for over the operating range and the resultant coulomb count is accurate to within 3%.

Resources

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DC2343A - Design Files Download

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DC2343A - Demo Manual Download

1.00M

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DC2343A - Software and Users Guide Download

3.00M

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DC2343A - Schematic Download

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Evaluation Kits1

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DC2343A

LTC3335 Demo Board | 680nA Iq Buck-Boost with Coulomb Counter, 1.8V ≤ VIN ≤ 5.5V, VOUT = 1.8V to 5V @ 15mA

Tools & Simulations 1

Linduino

Linduino is Analog Devices’ Arduino compatible system for developing and distributing firmware libraries and example code for our integrated circuits. Each Linduino-supported product includes an example main program, defined in the LTSketchbook/Part Number folder and driver code, defined in the LTSketchbook/libraries folder.

Linduino code repository on GitHub and instructions on how to use the code.

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Code Files

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