SC2440ATETRT

Voltage - Input (Max):	30V
Supplier Device Package:	16-TSSOP
Package / Case:	16-TSSOP (0.173", 4.40mm Width) Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 105°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	Up to 2.5MHz
Current - Output:	2A
Voltage - Output (Max):	27V
Voltage - Output (Min/Fixed):	1V
Series:	--
Voltage - Input (Min):	2.8V
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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SC2440ATETRT Application Field and Working Principle

SC2440ATETRT is an advanced, highly efficient DC-DC switching regulator from Linear Technology Corporation. It is part of their PMIC (Power Management Integrated Circuit) portfolio, specifically under the Voltage Regulators group, hosting a multitude of different products designed for various DC-DC power regulating solutions. In detail, the SC2440ATETRT is classified under DC-DC Switching Regulators.The SC2440ATETRT is a high power density and high efficiency, fully integrated solution that provides as much as 4A of constant load current with step-down, step-up and inverting operation. It is capable of being programmed with independently adjustable frequency, duty cycle and reference voltage settings to suit the desired output conditions despite input and load variations. In addition, the SC2440ATETRT includes synchronization, supply under- and over-voltage lockout (UVLO, OVLO), and a programmable soft start.With advantages of unparalleled robustness, high signal-to-noise ratio, low-noise and low voltage ripple, high precision and accuracy, as well as operating temperature range from -40C to +85C, the SC2440ATETRT ensures flawless performance for any qualifying application. For example, the device has been used in a wide range of industrial, automotive, consumer and communications applications, where DC-DC power regulation is essential.The SC2440ATETRT, like most other DC-DC switching regulators, uses a modulation technique called Pulse Width Modulation (PWM) to adjust the power delivered to the load based on the desired output voltage. This is known as the pulse-width modulation (PWM) technique. To understand this process better, we will look at the basic principles of PWM.Pulse-width modulation is achieved by modulating a voltage signal into a digital signal consisting of pulses at fixed frequency and varying duty cycle, which is a measure of the ratio of on-time to off-time for one period of the signal. The duty cycle and frequency are independently adjustable on the SC2440ATETRT, and so the output voltage can be adjusted accordingly.In simple terms, PWM is a technique of varying the time in which the switch is on, by disconnecting and reconnecting it in a certain amount of time and with certain relative duration, while maintaining a fixed pulse rate. The pulse rate is the amount of time between each "on-off" cycle, and the duty cycle is the duration in which the switch is on and off.In each “on-off” cycle, the SC2440ATETRT switches between two positions. These two positions are determined by the reference voltage setting, which can be used to control the output voltage. When the switch is in the on position, it supplies current to the load, and when it is off, the current is cut off. This switching process is done at a high frequency of up to 4 MHz with the SC2440ATETRT, allowing for precise output voltage regulation and almost instantaneous response time.The design of the SC2440ATETRT allows for an optimized current path, providing improved power transfer efficiency from input to output and an overall high efficiency of up to 95%. This is achieved by utilizing linear technologies advanced High-Side MOSFET technology and its proprietary properties. It also features an advanced integrated control architecture for stable performance in a wide range of input and load conditions.In summary, the SC2440ATETRT is a high performance and high efficiency DC-DC switching regulator, offering 4A constant load current, wide operating temperature range and adjustable voltage settings. It is ideal for industrial, automotive, consumer and communications applications where DC-DC power regulation is essential. Its advanced integrated control architecture and the utilization of sophisticated High-Side MOSFET technologies make it a versatile solution providing improved power transfer efficiency and reliability.

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