MAX1724EZK27-T

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The MAX1724EZK27-T is a switching voltage regulator in the PMIC (Power Management IC) family of voltage regulators. It is a DC-DC step-down (buck) regulator which can deliver up to 3 amps of output current in low dropout mode. It is specified to operate over a wide input voltage range of 3.8V to 18V, and provides programmable output voltage of 0.8V to 5V. The device uses a switching frequency of 2 MHz, which enables a very small form factor with very low ripple and practically no external components. This makes it ideal for applications such as PDAs, cell phones, MP3 players, portable medical devices and other battery powered applications where saving space is a priority.

The MAX1724EZK27-T\'s control system operates in voltage mode, which means it is able to maintain a very precise DC voltage output at the expense of a slight ripple. It utilizes a closed loop architecture to control a pair of n-channel MOS transistors. The use of the n-channel transistors provides the highest level of efficiency at light loads and low input voltages. When an input voltage within the required range is sensed, the internal power switch of the MAX1724EZK27-T immediately turns on to provide a regulated output voltage.

The power switch is driven by an internal oscillator, which sets the switching frequency of the device to 2 MHz. The oscillator continuously measures and adjusts the frequency to maintain a steady output voltage under all load and line conditions. The switching frequency is programmed with two external resistors, which allows the user to optimize the efficiency of the device to the specific application requirements.

The MAX1724EZK27-T includes a wide range of protection features to ensure a reliable operation. These include thermal protection, under voltage lockout, current limiting, loss of line protection, and output over-voltage protection. The MAX1724EZK27-T can also operate in Pulse Width Modulated (PWM) mode, which makes it ideal for use in applications where a low ripple output is required despite large swings in input voltage or load current.

The MAX1724EZK27-T is a versatile and reliable power solution for applications including PDAs, cellular phones, MP3 players, portable medical devices and battery powered equipment. Its combination of high efficiency, small size, low ripple output and wide range of protection features make it an ideal choice for these and other similar applications.

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