LM2657MTCX

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The LM2657MTCX is a DC-DC switching controller, an integrated power management integrated circuit (PMIC) used in voltage regulators. It is a step-down (buck) converter, with features that make it suitable for regulated voltage supplies from a highly variable or wide input voltage range. It has a wide operating temperature range, and its package is of a low profile, 8-pin SOT-23, allowing for high-density mounted applications.

The output voltage range of the LM2657MTCX can be programmed for various low voltage supplies. It has two voltage reference ranges (1.25V and 2.5V) that correspond to two equally spaced output ranges. These provide output accuracy from the selected reference with input voltage ratios. In MANUAL mode it can be set to deliver an output voltage from 0.6 to 16V. The device also has low quiescent current, which is important for battery-powered systems since they require minimal power consumption while in standby.

The LM2657MTCX is a DC-DC converter with pulse width modulation (PWM) control. This allows the output voltage to be accurately controlled over a wide range of input frequencies. Its PWM control loop has a fast transient response and excellent load regulation. It operates with very low ripple and significant reduction in EMI compared to traditional switching regulators. Additionally, the device features auto-restart protection and a thermal shutdown circuit to protect against over-voltage conditions and excessive power dissipation.

The LM2657MTCX also has an over-current protection feature that monitors the output current and reduces the output voltage before tripping the protection circuit. This limits the output current to a level that is below the peak current rating. It also has a power good output signal that provides reliability and over-temperature protection by indicating the presence of the input voltage and output current limits.

The device can be used for a variety of applications, such as battery charging, supply regulation, computer memory power supply and DDR memory/graphics power. It can also be used to generate multiple output voltages in notebooks, phones, PDAs, and other mobile devices. It is a versatile, cost-effective solution for a wide range of power conversion requirements.

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