MAX1649ESA+

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The MAX1649ESA+ is an advanced DC-DC switching controller ideal for application-specific implementations of switching power supplies. This advanced IC combines an internal oscillator, 3V to 20V operating voltage, fast transient response times, low noise operation, and a typical standby current of 0.1µA, enabling designers to create more efficient and reliable power supplies with optimized performance.

The MAX1649ESA+ is based on a pulse-width modulation (PWM) controller with a two-level pulse modulation, enabling it to operate at a very wide range of frequencies, including higher range of frequencies than other PWM controllers. The internal oscillator can be used to set the switching frequency of the IC and can be adjusted from 8kHz to 30MHz, reducing the need for external components.

The MAX1649ESA+ features a dual-mode control circuit that allows designers to choose either ripple-current or constant-voltage control depending on the power supply application. In ripple-current operation, the MAX1649ESA+ adjusts the voltage output by changing the duty cycle of the PWM outputs, resulting in a varying output voltage as the load current changes. In constant-voltage operation, the MAX1649ESA+ maintains a constant output voltage regardless of the load current, by adjusting the on-time of the PWM outputs.

The MAX1649ESA+ has overvoltage protection and adjustable over-current protection which can be used to protect the power supply from overload and overvoltage damage. It also features two logic pins, which can be used to enable and disable the MAX1649ESA+ and to monitor the output voltage.

The MAX1649ESA+ is suitable for a wide range of applications including AC/DC adapters, power supplies for laptop computers and other portable devices, battery charging and backup systems, and DC/DC conversion for industrial applications.

In summary, the MAX1649ESA+ is an advanced DC-DC switching controller offering a wide range of features in a very compact form factor. It combines an internal oscillator, 3V to 20V operating voltage, fast transient response times, low noise operation, and a typical standby current of 0.1µA, enabling designers to create more efficient and reliable power supplies with optimized performance.

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