LTC4444-5

`Supply Voltage
         V<sub>CC</sub> ......................................................... 0.3V to 14V
         BOOST TS ........................................... 0.3V to 14V
`TINP Voltage ................................................... 2V to 14V
`BINP Voltage .................................................. 2V to 14V
`BOOST Voltage .......................................... 0.3V to 114V
`TS Voltage .................................................... 5V to 100V
`Operating Junction Temperature Range
       (Note 2) ..................................................55 to 125
`Storage Temperature Range ......................65 to 150
`Lead Temperature (Soldering, 10 sec) ..................... 300

Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended  periods may affect device reliability and lifetime.

Note 2: The LTC4444E-5 is guaranteed to meet specifi cations from 0 to 85. Specifi cations over the 40 to 125 operating junction temperature range are assured by design, characterization and correlation with statistical process controls. The LTC4444I-5 is guaranteed over the 40 to 85 operating junction temperature range. The LTC4444MP-5 is guaranteed over the full 55 to 125 operating junction temperature range.

The LTC^®4444-5 is a high frequency high voltage gate driver that drives two N-channel MOSFETs in a synchronous DC/DC converter with supply voltages up to 100V. The powerful driver capability reduces switching losses in MOSFETs with high gate capacitance. The LTC4444-5's pull-up for the top gate driver has a peak output current of 1.4A and its pull-down has an output impedance of 1.5. The pull-up for the bottom gate driver has a peak output current of 1.75A and the pull-down has an output impedance of 0.75.

The LTC4444-5 is confi gured for two supply-independent inputs. The high side input logic signal is internally level-shifted to the bootstrapped supply, which may function at up to 114V above ground.

The LTC4444-5 contains undervoltage lockout circuits that disable the external MOSFETs when activated. The LTC4444-5 also contains adaptive shoot-through protection to prevent both MOSFETs from conducting simultaneously.

The LTC4444-5 is available in the thermally enhanced 8-lead MSOP package.

For a similar driver in this product family, please refer to the chart below.