LTC1261IS8#TRPBF Integrated Circuits (ICs)

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LTC1261IS8#TRPBF is one of the latest dc dc switching regulators from Linear Technology Corp. It provides an industry standard 8-pin SOIC industry package and is designed for use in many different industries from telecommunications to automotive and industrial applications. This high efficiency regulator is capable of delivering a continuous output current of up to 6.6A and includes an integrated power supply fault output that allows automatic system shutdown and off-loop operation in the event of an overcurrent or undervoltage condition.

The input voltage range of this regulator is from 5V to 18V and it can support a variety of output voltages ranging from 0.6V to 5.5V. It features overvoltage, undervoltage and overcurrent protection as well as thermal shut-down and soft-start functions. The switching frequency of LTC1261IS8#TRPBF is adjustable between 100kHz to 500kHz, allowing users to set the operating frequency to minimize EMI and minimize the size of filter components. It also has a low quiescent current of less than 250µA in standby mode.

This regulator is suitable for non-isolated step-down dc to dc conversion applications with an input voltage range of 3V to 18V. It can be used in various applications such as set-top boxes, computer peripherals, handhelds, portable computers, industrial control and power management circuits. The operating temperature range of this regulator is from -40°C to +85°C. It is also fully RoHS compliant and can be used in lead-free applications.

The working principle of the LTC1261IS8#TRPBF is based on pulse-width modulation (PWM) techniques. Inside this regulator, an internal oscillator generates a high frequency PWM signal which is then converted to a low frequency PWM signal by a frequency divider. An internal voltage comparator detects the pulse width of the control signal and converts it into a high or low digital signal which is then used to drive an integrated N-channel MOSFET switch. The switching of this switch is controlled by an internal voltage feedback loop. When the output voltage reaches the setpoint, the feedback network shuts down the MOSFET switch.

The output voltage is also monitored by the current sense amplifier, which will turn the MOSFET switch off in the event of an over-current condition. The LTC1261IS8#TRPBF also has a peak current limit feature, which ensures that the current in the output circuit doesn\'t exceed the set current limit. This regulator also provides an integrated power supply fault output which can be used to automatically shut down the system in the event of an over-current or undervoltage condition.

In conclusion, the LTC1261IS8#TRPBF is a high efficiency dc dc switching regulator from Linear Technology Corp. It can deliver up to 6.6A of continuous current and offers adjustable switching frequency ranging from 100kHz to 500kHz. Additionally, it includes overvoltage, undervoltage and over-current protection as well as thermal shut-down and soft-start functions. All these features make the LTC1261IS8#TRPBF suitable for a wide range of non-isolated step-down dc to dc conversion applications such as set-top boxes, computer peripherals, handhelds, portable computers, industrial control and power management circuits.

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