LTC3443EDE#PBF

Voltage - Output (Min/Fixed):	2.4V
Base Part Number:	LTC3443
Supplier Device Package:	12-DFN (4x3)
Package / Case:	12-WFDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	Yes
Frequency - Switching:	600kHz
Current - Output:	1.2A
Voltage - Output (Max):	5.25V
Series:	--
Voltage - Input (Max):	5.5V
Voltage - Input (Min):	2.4V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck-Boost
Output Configuration:	Positive
Function:	Step-Up/Step-Down
Part Status:	Active
Packaging:	Tube

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Introduction of LTC3443EDE#PBF

The LTC3443EDE#PBF is a synchronous DC-DC converter controller IC from the family of high performance switching regulators. It can be used to fixed frequency, high current buck converter, boost converter and SEPIC applications in a very simple, small form factor. The IC operates between an input voltage range of 2.5V to 5.5V and provides a wide range of output voltage options depending on the usage requirements.

Application Field of LTC3443EDE#PBF

The LTC3443EDE#PBF can be used in a variety of applications, from simple step-down or step-up converters to multiple voltages and split-rail designs. It is ideal for automotive, industrial and consumer applications such as portable digital and consumer electronic devices, power management of battery-powered equipment and applications requiring high efficiency, low supply voltage and low standby current.

Working Principle of LTC3443EDE#PBF

The LTC3443EDE#PBF is based on a fixed-frequency synchronous PWM controller architecture. It is designed to work with a wide variety of external power switches, and can deliver high efficiency in a wide range of operating conditions. It is also very versatile in addressing different requirements put on the output voltage, e.g. by adding an external voltage reference, the oscillator frequency can be trimmed to create the optimum output voltage ripple.The IC can be used in either buck or boost topologies, with the input voltage connected to the VIN pin and the output voltage connected to the VOUT pin. The switching frequency is set by connecting an external resistor between the RT/MID pin and the VOUT pin, which determines the frequency based on the input voltage. This can be further adjusted by connecting an external voltage reference (VREF) between the RT/MID pin and the ground.The LTC3443EDE#PBF also features an under-voltage lockout to protect against start-up into a low voltage condition, as well as a power-saving sleep mode. An internal current-limiting circuit provides protection from over-currents, while an external low-side MOSFET ensures smooth transition during load transients.

Conclusion

The LTC3443EDE#PBF is a versatile and high performing DC-DC switching regulator IC that can be used in a variety of applications. It operates with a wide input voltage range and offers flexible output voltage options. An internal current-limiting circuit and under-voltage lockout protect the device from over-currents and low-voltage conditions. The device is easy to integrate with other components and can deliver high efficiency in a variety of settings.

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