Current - Peak Output (Source, Sink):	2.5A, 3A
Base Part Number:	LTC4444
Supplier Device Package:	8-MSOP-EP
Package / Case:	8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 150°C (TJ)
Rise / Fall Time (Typ):	8ns, 5ns
High Side Voltage - Max (Bootstrap):	114V
Input Type:	Inverting
Series:	--
Logic Voltage - VIL, VIH:	1.85V, 3.25V
Voltage - Supply:	7.2 V ~ 13.5 V
Gate Type:	N-Channel MOSFET
Number of Drivers:	2
Channel Type:	Independent
Driven Configuration:	Half-Bridge
Part Status:	Active
Packaging:	Tube

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Introduction

The LTC4444MPMS8E#PBF is a high performance power conversion IC from Linear Technology that is designed to help engineers provide a wide range of useful tricks to their designs. It is a switching power IC primarily designed to fulfill modern ultra-low voltage, high-speed power management tasks, particularly those associated with gate drivers.

Application Field

The LTC4444MPMS8E#PBF is mainly used for applications related to gate drivers. It is ideal for driving NMOS and PMOS transistors as well as several kinds of discrete components. It can handle up to 6V of gate drive voltage and can also be used for controlling low-voltage power supplies.In addition, the chip is also used for galvanically isolated applications like power-on reset and load switches. When the chip is used with a CMOS logic gate, it can provide a low-power, low-voltage solution for powering on and off other gate drivers.

Working Principle

At its heart, the LTC4444MPMS8E#PBF is a switching power IC that uses a proprietary architecture to provide low-power, high-speed gate drive voltage. It is self-protected against spikes and can limit inrush current to protect the load and downstream components. The chip consumes very little standby current and is designed to operate efficiently. The over temperature protection feature ensures that the chip can handle a wide range of temperatures and still remain operational.When the chip is used as a power switch, it works by taking the power from the gate driver and providing it to the load. Depending on the type of circuit being used and the device connected to it, the load can be switched between several different power levels.

Conclusion

The LTC4444MPMS8E#PBF is a versatile power conversion IC from Linear Technology. It is primarily used for controlling gate drivers and for galvanically isolated applications like power-on reset and load switches. It is self-protected against spikes and has an over temperature protection feature. Furthermore, it consumes very little standby current and operates at high efficiency.

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