LTC3335 – Nanopower Buck-Boost DC/DC with Integrated Coulomb Counter




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

Integrated Coulomb Counter




Description

The LTC®3335 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

For More Details: LTC3335 – Nanopower Buck-Boost DC/DC with Integrated Coulomb Counter

READ  Buck/boost/inverting controller delivers up to 20 A




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