Linear introduces micropower boost converter
A Linear Technology Corp product story
Edited by the Electronicstalk editorial team Nov 9, 2009
Linear Technology has brought out the LT8415, a low-noise micropower boost converter with integrated dual half-bridge switches.
The LT8415's design scheme requires only 10.5uA of quiescent current, which is reduced to 0uA in shutdown.
Linear Technology has announced the LT8415, a low-noise micropower boost converter with integrated dual half-bridge switches.
Integrated high value (12.4M/0.4M) output feedback divider resistors enable the LT8415 to regulate a 16V output with less than 70uA of total input current.
Its small 25mA switch-current limit enables it to operate efficiently from high impedance sources, such as coin-cell batteries without any inrush current limitation.
The LT8415's integrated N-channel and P-channel Mosfets in each half-bridge are synchronously controlled by a single input pin and never turn on at the same time, maximising system reliability for applications such as MEMs relays.
The internal Mosfets are sized to drive capacitive loads ranging from a few pF to several nF without issue.
The LT8415 integrates the main switch, half-bridge switches, Schottky diodes and output disconnect on a single die, packaged in a 2mm x 3mm DFN.
The LT8415's wide 2.5 to 16V input voltage range enables it to operate from single-cell Li-Ion batteries up to fixed 12V input rails, delivering outputs up to 40V.
The output voltage can be adjusted dynamically by driving the FBP pin with an external voltage source.
The LT8415 can deliver more than 700uA of average output current at 34V from a single Li-Ion cell, making it ideal for applications such as MEMs relays or biasing power.
Both parts use a control technique that delivers efficiencies as high as 88 per cent and low output ripple (<10mVPK-PK) over a wide load current range.
Other features include integrated soft-start and overvoltage protection.
The combination of the LT8415's 2mm x 3mm DFN package and tiny, low-cost ceramic capacitors and inductors provides a compact solution footprint.
The LT8415EDDB is available from stock in a 12-lead 2mm x 3mm DFN package.
An industrial temperature version, the LT8415IDDB, is also available from stock in a 12-lead 2mm x 3mm DFN package.
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Other Linear Technology Corp stories
- Linear releases dual-channel DC/DC converters
Linear Technology has introduced the LT3582, LT3582-5 and LT3582-12 dual-channel DC/DC converters. - DC/DC controller drives N-channel power Mosfets
Linear Technology has announced the LTC3854, a tiny 2mm x 3mm DFN-12 packaged, wide input voltage range synchronous step-down switching DC/DC controller that drives all N-channel power Mosfet stages. - Linear unveils 50V synchronous buck converter
Linear Technology has introduced the LTC3632: a 50V input-capable synchronous buck converter that delivers up to 20mA of continuous output current from a 3 x 3mm (or MSOP8-E) package. - Linear converter achieves +/-1LSB INL and DNL
Linear Technology has introduced the LTC2754-16, a quad 16-bit current output digital-to-analogue converter (DAC) that achieves +/-1LSB integral nonlinearity (INL) and differential nonlinearity (DNL). - Linear DC/DC controller has wide input range
Linear Technology has announced the LT3757, a wide-input-range DC/DC controller for boost, flyback, SEPIC and inverting power supply applications.
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