LTC3412AMPFE#PBF

Voltage - Output (Min/Fixed):	0.8V
Base Part Number:	LTC3412
Supplier Device Package:	16-TSSOP-EP
Package / Case:	16-TSSOP (0.173", 4.40mm Width) Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 125°C (TJ)
Synchronous Rectifier:	Yes
Frequency - Switching:	300kHz ~ 4MHz
Current - Output:	3A
Voltage - Output (Max):	5V
Series:	--
Voltage - Input (Max):	5.5V
Voltage - Input (Min):	2.25V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tube

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LTC3412AMPFE#PBF is a high efficiency, low quiescent current synchronous buck regulator for either a distribution or point-of-load design. It is engineered to deliver a maximum output voltage of 4.2V and a minimum output voltage of 0.6V, at a maximum output current of 12A. LTC3412AMPFE#PBF can be used for a wide range of applications including distributed power systems, point-of-load power regulation, and embedded core voltage regulation. In addition, LTC3412AMPFE#PBF supports a wide range of input voltages, from 2.7V to 5.5V, making it the ideal choice for a variety of power supplies.The LTC3412AMPFE#PBF is part of Linear Technology\'s family of high efficiency, ultra-low quiescent current, DC-DC synchronous buck regulators. It is a fully integrated power solution with a synchronous buck architecture. This architecture offers high efficiency over a wide load range as well as a wide input voltage range. The design is optimized to maintain high efficiency even at low output current levels.The LTC3412AMPFE#PBF is designed for ultra-low quiescent current operation, with a typical quiescent current of only 8µA. It features an active current balance regulation loop that cycles the current balance in the upper and the lower switches to maintain the current balance ratio of approximately 50%. This permits increased efficiency, reduced negative headroom and a smaller printed circuit board area.The LTC3412AMPFE#PBF is an ideal solution for point-of-load (POL) and distributed power systems. It is designed to deliver up to 12A of continuous output current per phase and a maximum output voltage of 4.2V. The device supports a wide input voltage range, from 2.7V to 5.5V, making it ideal for a wide range of applications. It also has programmable soft-start and current limit features, allowing the user to finely tune the device to the application.The LTC3412AMPFE#PBF is a synchronous buck regulator and works on the principle of switching power conversion. The conversion is implemented by a pair of network elements (switches) connected in a buck configuration. These switches are commonly referred to as MOSFETs, or metal oxide semiconductor field-effect transistors.At the heart of the buck regulator is the control circuit. This circuit senses the input voltage and instructs the switches to open and close at the optimal rate so that it produces the desired output voltage. The switching frequency of the LTC3412AMPFE#PBF is adjustable from 250kHz to 1.2MHz and is controlled by an external resistor. This allows the user to optimize the frequency for maximum efficiency and lowest noise across the input voltage range.The output voltage of the LTC3412AMPFE#PBF is regulated by a feedback loop. An external op-amp is used to monitor the output voltage and compare it with the reference voltage. If the output voltage is higher than the reference voltage, the current balance loop will increase the off-time of the lower switch. If the output voltage is lower than the reference voltage, the current balance loop will increase the on-time of the lower switch. This cycle will continue until the output voltage is equal to the reference voltage.In summary, LTC3412AMPFE#PBF is a high efficiency, low quiescent current synchronous buck regulator with a maximum output voltage of 4.2V, a minimum output voltage of 0.6V, and a maximum output current of 12A. It features a synchronous buck architecture, an active current balance regulation loop, programmable soft-start, and adjustable switching frequency for design optimization. Therefore, it is the ideal solution for distributed power systems, point-of-load power regulation, and embedded core voltage regulation.

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