Voltage - Output (Min/Fixed):	1.244V
Base Part Number:	LT1268
Supplier Device Package:	5-DDPAK
Package / Case:	TO-263-6, D²Pak (5 Leads + Tab), TO-263BA
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 125°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	150kHz
Current - Output:	7.5A (Switch)
Voltage - Output (Max):	60V (Switch)
Series:	--
Voltage - Input (Max):	30V
Voltage - Input (Min):	3.5V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck, Boost, Flyback
Output Configuration:	Positive or Negative
Function:	Step-Up, Step-Down, Step-Up/Step-Down
Part Status:	Active
Packaging:	Tube

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LT1268CQ#PBF Application Field and Working Principle

Introduction

The LT1268CQ#PBF is a high-efficiency, high power, ultra-small DC-DC switching regulator. It is extremely versatile, but also works well for a range of specific applications. It is able to set the desired output voltage and input related application parameters during operating system configuration and thereby provides designers with much flexibility and convenience.In addition, it offers some very interesting additional features such as adjustable Current Limit and Soft Start Voltage Regulation, providing improved stability, long term reliability and easy configuration of the system.

Application Fields

The LT1268CQ#PBF is most often used in applications where a stable power supply is needed. One of its main uses is in mobile electronics, specifically portable computers, tablets, and phones. It is also used in automotive applications and in medical projects.The LT1268CQ#PBF is able to provide a regulated current and voltage, making it ideal for a variety of digital logic circuits and communication components. It is also well-suited for use with microcontrollers and digital signal processing applications.The LT1268CQ#PBF is also used in FPGA, ASIC, DSP/SOC, and CPLD applications. In these applications, it is used to regulate power supply for the logic core, allowing for efficient, stable operation.Finally, the LT1268CQ#PBF can be used in small motor controller and switching power supply designs. It is an ideal choice for systems with an input voltage range of 2.7V to 5.5V and an output voltage range of 2.7V to 40V.

Working Principle

The LT1268CQ#PBF is able to adjust the level of stored energy based on the input and output voltage levels, which results in an efficient, stable power supply. The power supply works on a two-stage approach, using an internal voltage regulator to regulate and control the current.The first stage is known as the boost stage. Using an internal NMOS transistor, the voltage is increased from the input voltage level to the desired output voltage level. This is done via a controlled process known as Pulse-Width Modulation (PWM). The regulation processor constantly checks the output voltage level and increases or decreases the current output in order to reach the desired voltage level.The second stage is the wide input range buck converter. This stage allows for a wide variety of input voltages and provides an efficient way to step down the input voltage to an acceptable level for the output voltage. This stage is also used to limit the current output, providing improved stability and long-term reliability.

Advantages

The LT1268CQ#PBF offers several advantages over traditional solutions. It has a very low quiescent current, which means that it uses very little power when idle. This helps to reduce overall system power consumption and can lead to longer battery life in portable devices. The LT1268CQ#PBF also allows for adjustable current limit settings, which provides improved protection against current surges and helps to maintain system stability. It also allows for Soft Start Voltage Regulation which helps to ensure that system settings are properly set without much difficulty.Finally, the LT1268CQ#PBF is able to provide very low output ripple and noise thanks to its high-efficiency design. This helps to reduce electromagnetic interference and helps to ensure that the system is working correctly.

Conclusion

The LT1268CQ#PBF is an extremely versatile and efficient DC-DC switching regulator. It offers improved efficiency, stability and long-term reliability and is able to operate in a wide range of applications. It also offers adjustable current limit, soft start voltage regulation and low output noise. This makes it an ideal choice for a variety of applications, from portable electronics to automotive and medical designs.

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