MAX1724EZK50+T

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The MAX1724EZK50+T application field and working principle belongs to the devices in the category of PMIC - Voltage Regulators - DC DC Switching Regulators. The MAX1724EZK50+T is a simple, low cost step-down DC-DC switching regulator featuring high efficiency, low noise and switch current consumption.

This makes the MAX1724EZK50+T ideal for both the single-cell Li-ion and Li-polymer battery powered industry in the mobile applications like tablet PCs, digital cameras, and other similar applications that require low noise, low cost and space efficient DC-DC power supplies. It also helps to reduce external component count in the applications. MAX1724EZK50+T includes a wide operating range with an input voltage range of 2.3V to 5.5V with adjustable output voltage range of 0.8V to V IN – 0.2V.

The DC-DC switching regulator combines a current-mode PWM control circuit with a 500mA power switch. The current-mode PWM operation provides fast transient response and prevents sub-harmonic oscillation. It also limits the maximum duty cycle to prevent internally generated V OUT. It offers low start-up current, light load efficiency and phase-lock-loop (PLL) mode options, low noise and low component count.

The MAX1724EZK50+T DC-DC switching regulator has an integrated power switch and current-sense resistor that can deliver up to 500mA of output current. It also contains an integrated compensation network, which helps reduce the external component count. The Soft-Start feature of the regulator helps reduce the amount of current surge and output ripple by reducing the inrush current at start-up and limiting the slew rate of the transient response.

To protect the device from damages during abnormally high load current and over temperature, the MAX1724EZK50+T has various protection circuitry like over-current protection (OCP) and thermal shutdown (TSD) for load protection. The user can also adjust the OCP levels and TSD trip point through the register settings.

The output of the MAX1724EZK50+T DC-DC switching regulator can be adjusted through an external resistor divider connected to the error amplifier output. The output voltage is also limited through the soft start feature that limits the surge current at the time of startup and reduces the output noise and ripple by implementing a slow and gradual increase in the output voltage. The output of the regulator also can be disabled by a logic signal at DIS pin.

In summary, the MAX1724EZK50+T application field and working principle belongs to the DC DC Switching Regulators within the category of PMIC - Voltage Regulators. The device is an efficient low-cost step-down DC-DC switching regulator suitable for the mobile applications with Li-ion and Li-polymer battery powered ports. The device offers low noise and high efficiency, with an adjustable output voltage range and an integrated power switch and current-sense resistor providing up to 500mA of output current. It also has various protection circuitry like OCP and TSD and a Soft-Start feature reducing the output ripple and inrush current.

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