MAX16992ATCD/V+T

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The MAX16992ATCD/V+T is a general-purpose dual-channel non-synchronous inductive DC-DC controller for multi-rail, passive-diode and active-diode topologies. This component is tailored to solve the voltage regulation needs of applications such as low-power embedded systems, motor drivers, and power supplies. The MAX16992ATCD/V+T is the first device in the MAX16992 family to include Vin tracking and tolerance functions, which enable tight control of the output voltage over a wide input-voltage range.

Application Field

The MAX16992ATCD/V+T is ideal for low-power embedded systems that require tight voltage regulation. The device ​combines two DC/DC channels, each with power up to 2.25A, in a single package to easily achieve multiple output voltages. Its high-efficiency synchronous controller, switching up to 2MHz, and integrated MOSFETs, coupled with the high 1.6A low-side gate-drive output per channel, significantly increase the power density of the system and reduce the overall solution size. The MAX16992ATCD/V+T has features typically found only in specialized multichannel regulation solutions, such as programmable current limit, active-diode temperature monitoring, and high-frequency operation.

The MAX16992ATCD/V+T is well suited for setting up multiple outputs and, at the same time, providing best-in-class load and line transients for several demanding application requirements. Examples include systems with multiple low-voltage processors protection and power-on reset, motor drives, and the multiple outputs required in distributed power systems. The DC-DC controller also offers a regulated and smooth line transient that eliminates input-line ringing due to capacitance charge and discharge, avoiding electrolytic capacitor usage to reduce cost, power losses, and overall system size.

Working Principle

The workings of the MAX16992ATCD/V+T are centered around two tightly linked control loops. The first loop, the outer-loop, contains the controller\'s input voltage tracking and tolerance features. This loop uses the Vin signal to maintain the desired total output voltage, regardless of input voltage fluctuations. The inner-loop, the voltage regulation loop, monitors the voltage at the output pins of the device and adjusts the output current to maintain the desired output voltage. The operating mode of the loops depends on the programming of the device to set the input voltage tracking and tolerance functions.

The outer-loop is used for input voltage tracking by monitoring the Vin signal. The loop detects the variation in the input voltage at the Vin pin and adjusts the output current accordingly to maintain the desired output voltage setpoint. It can also be used to set the tolerance of the output voltage. This way, the circuit can compensate for the impact of the load, line, and temperature variations on the output voltage.

The inner-loop is the voltage regulation loop, which monitors the voltage at the output pins of the device and adjusts the output current to maintain the desired output voltage. It can also be used to set the allowable temperature range of the output voltage. The operating mode of each loop is adjusted using the settings programmed into the device.

The MAX16992ATCD/V+T also features a programmable current-limit function. The current limit reduces the maximum switch current to protect the system from excessive load conditions. It is also possible to configure the device to operate in a single-switch or dual-switch mode. This allows the circuit to be used for a wide variety of applications, making it a versatile and reliable solution for any voltage-regulating task.

Conclusion

The MAX16992ATCD/V+T is a highly advanced general-purpose dual-channel non-synchronous inductive DC-DC controller, designed to meet the voltage regulation needs of applications such as low-power embedded systems, motor drivers, and power supplies. It is well suited for low-power embedded systems that require tight voltage regulation, providing best-in-class load and line transients. Its high efficiency synchronous controller, switching up to 2MHz, and integrated MOSFETs significantly increase the power density of the system and reduce the overall solution size. The device also offers a programmable current limit, active-diode temperature monitoring, and high-frequency operation, making it a versatile and reliable solution for any voltage-regulating task.

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