Mosfet High Side Driver Charge Pump

The charge pump typically supplies 30μa charging 800pf of gate capacitance in 400μs vbatt 15v.

Mosfet high side driver charge pump.

The ltc7001 s powerful 1ω ga. The ltc 7001 is a fast high side n channel mosfet gate driver that operates from input voltages up to 135v. Typical applications are cooling fan water pump electrohydraulic and electric power steering. Its internal charge pump fully enhances an external n channel mosfet switch enabling it to remain on indefinitely.

The mic5019 operates from a 2 7v to 9v supply and generates gate voltages of 9 2v from a 3v supply and 16v from a 9v supply. An internal micropower regulator and charge pump generate the high side drive output voltage while requiring no external components. Its 3 high side and 3 low side output stages are powerful enough to drive mosfets with a gate charge of 400 nc with rise and fall times of approximately 150 ns. Norwood ma analog devices inc which recently acquired linear technology corporation announces the ltc7001 a high speed high side n channel mosfet driver that operates up to a 150v supply voltage.

The max1614 uses an internal monolithic charge pump and low dropout linear regulator to supply the required 8v vgs voltage to fully enhance an n channel mosfet high side switch figure 1. For slower turn on times simply. The device consumes a low 77µa of. The mic5019 is a high side mosfet driver with integrated charge pump designed to switch an n channel enhancement type mosfet control signal in high side or low side applications.

This simple inexpensive charge pump circuit overcomes the maximum on time limitation of the bootstrap circuit. The circuit presented above utilizes the advantages of the boot strap and charge pump technique providing excellent switch ing speed and steady state operation allowing the use of an n channel mos gated power device as a high side switch. Its powerful driver can easily drive large gate capacitances with very short transition times making it. The tle7183qu is designed for a 12 v power net.

The max1614 also features a 1 5 accurate low battery comparator that can be used to indicate a low battery condition provide an early power fail warning to the system microprocessor or disconnect the battery. The mic5021 can also operate as a circuit breaker with or without automatic retry. It contains an internal charge pump that fully enhances an external n channel mosfet switch allowing it to remain on indefinitely.