MAX859CUA+

Voltage - Output (Min/Fixed):	2.7V
Base Part Number:	MAX859
Supplier Device Package:	8-uMAX
Package / Case:	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 70°C (TA)
Synchronous Rectifier:	No
Frequency - Switching:	500kHz
Current - Output:	125mA (Switch)
Voltage - Output (Max):	6V
Series:	--
Voltage - Input (Max):	6V
Voltage - Input (Min):	0.8V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Boost
Output Configuration:	Positive
Function:	Step-Up
Part Status:	Active
Packaging:	Tube

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MAX859CUA+ Application Field and Working Principle

The MAX859CUA+ is a DC/DC switching regulator from Maxim Integrated, a semiconductor and analog IC manufacturer. It is a member of Maxim\'s family of low-noise, wide-input voltage, high efficiency, monolithic step-down switching regulators.The MAX859CUA+ is a synchronous step-down DC/DC converter designed to convert a wide range of input voltages into an adjustable output of 0.8 V to 12 V with up to 1 A output current. It incorporates a full bridge with Schottky rectifier and synchronous rectifier to offer excellent efficiency over a wide load and line range. The device contains internal soft-start circuitry and features output voltage accuracy of ±2.5% across the entire output range.The MAX859CUA+ operates with an input voltage range of 3 V to 18 V and provides the user with a variety of operating frequency selections from 200 kHz to 2 MHz from an external clock source. The user can program the output voltage precisely and control the current limit threshold with an external sense resistor. In addition, a power good output provides an accurate indication of the output voltage status.The device\'s compact design, high efficiency, and low noise make it an ideal choice for powering high-performance computations, DSPs, FPGAs, microprocessors, and other applications. The high-efficiency MAX859CUA+ is ideal for use in tight, space-critical applications and has a -40 °C to 125 °C junction temperature range with maximum operating temperatures up to 150 °C, making it suitable for a wide range of environments.The MAX859CUA+ operates in two modes: pulse-width modulation (PWM) mode and pulse frequency modulation (PFM) mode. In PWM mode, the device can maintain excellent load and line regulation. PFM mode, on the other hand, enables the device to power high capacitive loads, leading to improved battery life in portable applications.The MAX859CUA+ utilizes a current-mode control architecture, which is a combination of a voltage reference, an error amplifier, a high-side current sense amplifier, a control transistor, and a low-side power transistor. The control circuit consists of a linear regulator, and a pulse-width modulated switching regulator, which is driven by the error amplifier. The high-side current sense amplifier senses the current delivered to the output and feeds the voltage of charge back to the error amplifier for precise current limit detection.The MAX859CUA+ provides excellent thermal protection by monitoring its die temperature and shutting down the output voltage when die temperature reaches approximately 150 °C. Furthermore, the MAX859CUA+ features Reverse Current Protection (RCP), which prevents current flow from the output to the input during start-up and in fault conditions such as open-loop or thermal shutdown.Overall, the MAX859CUA+ is an incredibly efficient and reliable DC/DC switching regulator that can meet the requirements of a wide range of applications, including mobile computing, industrial control and automation, medical, networking, and consumer electronics. With its excellent efficiency, low noise, and high current capability, it is the ideal choice for designers who need a reliable and efficient DC/DC solution.

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