Voltage - Output (Min/Fixed):	-Vin, 2Vin
Base Part Number:	MAX860
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-25°C ~ 85°C (TA)
Synchronous Rectifier:	No
Frequency - Switching:	6kHz, 50kHz, 130kHz
Current - Output:	50mA
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	5.5V
Voltage - Input (Min):	1.5V, 2.5V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Charge Pump
Output Configuration:	Positive or Negative
Function:	Ratiometric
Part Status:	Active
Packaging:	Tube

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MAX860ISA Application Field and Working Principle

Introduction to MAX860ISA

The MAX860ISA is an integrated DC-DC converter and voltage regulator from Maxim Integrated. It features a wide range of selectable output voltage levels, as well as adjustable system control, such as soft-start and adjustable slew rate. The MAX860ISA is available in a variety of packages, including 28-pin SSOP, TQFN, and uMAX.

DC-DC Converter Applications

The MAX860ISA is designed to convert an input voltage to any desired level within its specifications. It is designed to provide regulated voltage(s) at the output where the input range may vary by up to ±2V or ±5%. This makes the converter ideal for applications where a regulated output power supply is needed, or where there is an intermittent voltage input or large fluctuations in the supply. Common application areas for the MAX860ISA include embedded systems, automotive, test and measurement, computing, handheld/consumer electronics, communications, data acquisition, and industrial control.

Operation of the MAX860ISA

The MAX860ISA operates as a “buck” converter (step-down) for both single-ended and split-rail power systems. It provides up to 1A of output current and works with an input voltage range of 4.5V to 28V. The MAX860ISA employs a cycle-by-cycle current limit to limit its output current, making it well suited for reducing high input supply voltages. The MAX860ISA can be set to any output voltage. A wide range of output voltages is available from 0.45V to 28V and is set by an external voltage divider. The output voltage is set as a fraction of the input voltage, according to the following equation: output voltage = input voltage x (DAC value/4095). The MAX860ISA’s built-in Digital-to-Analog Converter (DAC) allows for the user to easily change the output voltage with digital signals. The converter includes a variety of in-built protection features including over-voltage, under-voltage, over-temperature, and current limit protections. The MAX860ISA also has an adjustable soft-start and adjustable slew rate control. This allows the user to easily adjust the parameters to best suit their system’s needs. The MAX860ISA is easy to set-up and configure. It is designed to be easy to use, so that users can quickly adjust their system settings and get optimal performance. The on-board DAC can be accessed and programmed via a I2C interface. The settings can be remotely adjusted through a standard I2C bus so that any changes can easily be made. In addition, the MAX860ISA can be configured to be compliant with a variety of safety standards, including IEC60950, UL1703, and CSA C22.2.

Conclusion

The MAX860ISA is an integrated DC-DC converter and voltage regulator from Maxim Integrated. It can control both single-ended and split-rail power systems, offering up to 1A of output current and wide selectable output voltage levels. It includes a range of built-in features, such as over-voltage, under-voltage and over-temperature protection, as well as adjustable soft-start and adjustable slew rate control. The output voltage is set by a external voltage divider, and can be remotely adjusted via a I2C interface. This makes it easy to set-up and configure, making it well suited for a variety of applications, including embedded systems, automotive, test and measurement, computing, handheld/consumer electronics, communications, data acquisition, and industrial control.

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