LTC3633AIFE-2#TRPBF

Voltage - Output (Min/Fixed):	0.6V
Base Part Number:	LTC3633
Supplier Device Package:	28-TSSOP-EP
Package / Case:	28-TSSOP (0.173", 4.40mm Width) Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	Yes
Frequency - Switching:	500kHz ~ 4MHz
Current - Output:	3A
Voltage - Output (Max):	6V
Series:	--
Voltage - Input (Max):	20V
Voltage - Input (Min):	3.6V
Number of Outputs:	2
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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PMIC - Voltage Regulators - DC DC Switching Regulators

Voltage regulators are used to ensure that the voltage applied on a specific circuit is always constant, and they come in different formats in order to accommodate different requirements from different circuits. In this article, we will be focusing on the LTC3633AIFE-2#TRPBF which is a DC-DC switching regulator. The LTC3633AIFE-2#TRPBF is a triple, 200mA output switching regulator that comes in a 7mmx5mm QFN package. It is a silicon-based regulator designed to efficiently convert an input voltage of 2.50V to 5.5V into three separate output voltages. It supports operating frequencies up to 1.2MHz, making it suitable for high frequencies. Apart from its switching frequency, the regulator also features adjustable output voltage ranges, adjustable soft-start and overvoltage protection.The regulators can be used in a variety of applications such as mobile phones, digital cameras, and personal digital assistants (PDAs). They can also be used in telecommunications, set top boxes, and digital TVs. Additionally, they are suitable for functions that require multiple voltage levels, such as powering of logic and analog circuits.In terms of its general operation, the LTC3633AIFE-2#TRPBF features a fixed frequency, current mode PWM switching regulator with integrated power switches. This type of regulator is typically employed for power conversion applications, as it functions by switching the input voltage at a certain frequency in order to achieve a fixed output voltage. The LTC3633AIFE-2#TRPBF\'s operation can be divided into five stages:

• Pre-Charge Stage
• Voltage Regulation Stage
• Current Limit Stage
• Oscillator Reset Stage
• Shutdown Stage

During the pre-charge stage, an RCP cycle is initiated, which uses the pre-charge transistor to charge the output to the desired voltage level. The voltage regulation stage then steps in to regulate the output voltage by monitoring the output voltage and then adjusting the duty cycle of the switching phase appropriately. When the regulator reaches its maximum output current, it enters its current limiting stage, where the current limit circuit will sense the current level and decrease the duty cycle accordingly. After this, the oscillator reset stage will reset the PWM oscillator, which then sets the system to its normal operating state. Finally, if a higher power supply is connected to the regulator, it will enter into its shutdown stage where the transistor will be switched off. Overall, the LTC3633AIFE-2#TRPBF is a versatile and efficient DC-DC switching regulator. It is ideal for a variety of applications, providing improved efficiency and low power consumption. Furthermore, its features such as adjustable output voltage ranges, adjustable soft-start and overvoltage protection make the regulator a good choice for multiple power conversion applications.

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