Analog Devices LTC3335

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.

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 o f 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

REMARKS:-REFERTable 9.Recommended Inductors for the LTC3335PAGE NO 20

Typical applications

• Remote Monitors
• Long Lifetime Primary Cell Battery Applications
• Wireless Sensors
• Dust Networks® SmartMesh® Applications

More information

• Datasheet
• IC product information