LTC3441EDE#PBF

Voltage - Output (Min/Fixed):	2.4V
Base Part Number:	LTC3441
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:	1MHz
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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LTC3441EDE#PBF is a high efficiency, synchronous 4-switch buck-boost switching regulator controller with adjustable current limit and fixed-frequency operation up to 1MHz. The regulator integrates a precise 1.2V reference and supports voltages up to 42V for automotive, industrial and battery-powered applications. The device includes both buck and boost mode operation. In buck mode, the output voltage is lower than the input voltage, and in boost mode, the output voltage is higher than the input voltage.In addition to its synchronous buck-boost operation, the 4-switch architecture can be configured to operate in buck, boost, inverting buck-boost and SEPIC topologies. The constant frequency design offers the advantages of excellent noise reduction, easy compensation and the ability to use low cost, small size inductors and capacitors.The LTC3441EDE#PBF uses a sophisticated phase-loss protection and current limit circuit to protect against transient overcurrent faults. The device’s adjustable current limit design provides programmable protection at the start of voltage transients. The controller also features a soft-start capability to reduce output voltage overshoot during system turn-on.The LTC3441EDE#PBF’s adjustable current limit and varying frequency operation offer an array of possible applications, including power factor correction, power delivery, computer power supplies, USB power chargers, automotive systems, and a wide range of industrial applications.As a switching regulator device, the LTC3441EDE#PBF converts a DC input voltage to a DC output voltage with a switching device. It accomplishes this by pulse-width-modulating (PWM) the duty cycle of the switching device to control the output voltage. The duty cycle is directly proportional to the input voltage and the output voltage.As the duty cycle increases, the output voltage increases. Conversely, as the duty cycle decreases, the output voltage decreases. The switching device rapidly switches on and off, allowing current to enter or exit the circuit. This has the effect of dissipating part of the power in the switching device, resulting in a conversion from input to output voltage.The LTC3441EDE#PBF has an integrated 1.2V reference that is accurate over wide temperature ranges. This reference voltage can be used to establish an accurate output voltage in buck-boost topology. The voltage is set using a simple voltage divider, and the current limit is adjusted using an external resistor. The current limit can be adjusted during startup or operation.The LTC3441EDE#PBF also features an adjustable frequency operation ranging from 100kHz to 1MHz. This feature helps to optimize the power stage design and the frequency can be programmed using the FREQ pin. The switching frequency can be used to reduce noise and optimize efficiency.The device also features a comprehensive suite of protection features, such as overvoltage protection, undervoltage lockout, phase-loss detection and thermal shutdown. These features ensure safety and reliability for system operation.In summary, the LTC3441EDE#PBF is a high efficiency synchronous 4-switch buck-boost switching regulator controller with adjustable current limit and fixed-frequency operation up to 1MHz. It’s ideal for automotive, industrial and battery-powered applications, and can be used for a wide range of applications, including power factor correction and power delivery. The device includes comprehensive protection features for safety, and its adjustable current limit and varying frequency operation offer excellent optimization options for the power stage design.

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