MAX741DCAP+T

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The MAX741DCAP+T is a fixed frequency, bipolar step-down switching controller from Maxim Integrated family of DC-to-DC voltage regulators. This device operates from -20°C to +85°C, allowing for efficient DC-DC conversion among different voltage sources in these environments. It can be used to generate a wide range of output voltages from a wide range of input voltages with a single device.

The MAX741DCAP+T is a feature-rich, flexible and efficient DC-DC converter intended for applications ranging from telecom, automotive, industrial, instrumentation, and consumer electronics. It is capable of generating a flat, highly efficient, and low-noise output voltage over a wide input voltage range. The entire switching frequency range can be adjusted by an external CMOS or TTL logic voltage control. This capability allows for control over peak input and output currents.

The MAX741DCAP+T features protection against over-temperature and under-voltage conditions. This protection is provided by an integrated overtemperature and under-voltage protection (OTP/UVP) circuit that prevents the device from entering an under-voltage condition or over-temperature condition. Its protection circuit monitors the input voltage and temperature for any shortfalls or excesses and responds by either tripping it out of the device or allowing it to remain in the device. The device’s adjustable thermal protection threshold can be set from 70° C to 130° C, depending on the desired application. Additionally, it includes a RUN/FAULT-power good indicator, which provides an indicates when the fault is present or when the power supply is operating normally.

The MAX741DCAP+T offers a wide range of features that include a wide operating temperature range, high efficiency and an adjustable frequency control by an external CMOS or TTL logic voltage. It also includes two external protection circuitry for over-temperature and under-voltage protection. These features make it suitable for a wide array of applications, from telecom to automotive, industrial, instrumentation and consumer electronics.

Working principle of MAX741DCAP+T: The MAX741DCAP+T is a high-frequency step-down switching converter, capable of converting voltage from a wide range of input sources to output before the voltage conversion process. The oscillator clock signal frequency is set by a resistor divider, resistor and capacitor. The input supply voltage is monitored by the regulator, and when it drops to an under-voltage threshold, the protection circuitry trips the device and shuts it down. The internal protect circuit also monitors the junction temperature, and should it exceed a pre-determined value, the device shuts itself down and initiates an overtemperature protection process. The device is then shut down and releases a LOGIC output signal.

In summary, the MAX741DCAP+T is a compact, high efficiency DC-DC switching controller with a wide operating temperature range and features that include regulated output voltage and adjustable frequency control. With integrated over-temperature and under-voltage protection, it is suitable for a wide array of applications, from telecom to automotive, industrial, instrumentation and consumer electronics.

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