LTC3526EDC-2#TRMPBF

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LTC3526EDC-2#TRMPBF is a high frequency synchronous step-down switching regulator that draws very low quiescent current (35uA operating, 0.1uA shutdown). It can directly step-down a 4.5V to 5.5V input to 1.5V and offer an adjustable output voltage from 0.525V to 1.5V with external resistors and an integrated low-noise, high-PSRR FET. The power switch is integrated and can handle up to 1.4A load at the fixed out voltage. In the shutdown mode, the output is completely disconnected from the input. The regulator is also featured with internal soft start, current limit and over-temperature protection and is available in the 6-lead 2mm x 3mm DFN/MLF (TRMP) package.

The application fields of LTC3526EDC-2#TRMPBF includes:

• Automotive systems
• High current loads
• Portable devices
• Digital and mixed-signal systems
• Wireless infrastructure
• Industrial and process control

The input voltage range of LTC3526EDC-2#TRMPBF is from 3V to 5.5V and a maximum output current of 1.4A. With the external voltage setting resistors, it is possible to achieve the adjustable output voltage from 0.525V to 1.5V and the accuracy of the output voltage is plus or minus 0.5%. Low dropout operation of the regulator is typically 1.4V. The operating frequency of the regulator can range up to 1.5MHz, with the external frequency reset inputs it is possible to externally synchronize the operating frequency with any lower frequency. This includes 200kHz, 500kHz, 800kHz, 1MHz and 1.5MHz output switching frequencies.

In order to ensure the stability of the LTC3526EDC-2#TRMPBF, only the use of a proper compensation network is enough. This network consists of three resistors, the resistor that sets the output voltage and two compensation capacitor, one across on the output and the other one across on the feedback. These components, along with the board layout, design for a switching converter are critical for achieving good stability and performance.

When it comes to the working principle of the LTC3526EDC-2#TRMPBF, the synchronous step-down switching regulator is the building block for a high-efficiency buck-type switching regulator. The input voltage applied across the voltage regulator is converted into an AC voltage and then rectified by the diode. The rectified voltage is buffered by the output capacitor and presented to the load. The current through the inductor is sensed by the control loop, which in turn control the current and voltage at the output. The output voltage is regulated by the error amplifier, loop compensator, current sense resistor and the MOSFET. The power stage is synchronous. The two MOSFETs (high-side and low-side) are turned on and off in synchronization with the regulator\'s PWM signal. This ensures that the switch losses are minimized and the efficiency is maximized.

The LTC3526EDC-2#TRMPBF is a high-efficiency switching voltage regulator suitable for high current applications. Its features include an integrated power switch, adjustable output voltage, adjustable frequency, and low quiescent current. With its wide applicability, this switching regulator is an ideal choice for applications requiring an efficient, power-efficient solution for regulating DC outputs.

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