MAX765CSA+T

Voltage - Output (Min/Fixed):	-1V (-12V)
Base Part Number:	MAX765
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 70°C (TA)
Synchronous Rectifier:	No
Frequency - Switching:	300kHz
Current - Output:	120mA
Voltage - Output (Max):	-16V
Series:	--
Voltage - Input (Max):	16V
Voltage - Input (Min):	3V
Number of Outputs:	1
Output Type:	Adjustable (Fixed)
Topology:	Buck-Boost
Output Configuration:	Negative
Function:	Step-Up/Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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MAX765CSA+T Application Field and Working Principle

PMIC (Power Management Integrated Circuits) are devices employed in many consumer electronics, and voltage regulator ICs – devices that reduce the variable voltage available from an external source, such as a battery pack, to the (usually) steady voltage a set of electronic components or circuits require in order to work correctly - are a subset of PMICs. DC DC switching regulators are a type of voltage regulator which adjust the voltage from a higher to a lower level efficiently, without the need for linear regulators or transformer components. The MAX765CSA+T DC DC switching regulator from Maxim Integrated is a single-channel, step-down (buck) regulator with a high-accuracy reference voltage and low-noise, low-ripple output voltage.The MAX765CSA+T is optimized for use in many consumer application fields such as industrial control, instrumentation, communication equipment, and PC (both desktop and laptop) power-supply systems. This regulator provides a reliable and efficient solution approach to power supply design and, due to its small size, is popular in general-purpose portable systems.

Features of the MAX765CSA+T

The MAX765CSA+T is rated to deliver up to 1.5A at a constant voltage (Vout) of 1.2V-7V, with a maximum typical duty cycle of 100%. It offers wide input voltage range (from 1.8V to 7.5V or 2.7V to 15V, depending on the version chosen) and accurate output-voltage regulation, including very low overshoot and undershoot, with maintained sense voltage and regulation. This device also offers excellent load/line transient performance and ripple-rejection capabilities, thanks to the Maxim Integrated proprietary adaptive-loop control technique. Coupled with its high switching frequency (1MHz) and highly integrated PWM controller, the MAX765CSA+T can provide a compact, cost-effective alternative to larger, external voltage regulation solutions.The MAX765CSA+T includes EMI (electromagnetic interference) filters and requires no external compensation components, which saves the user considerable design and test effort. It also offers user-selectable operating modes – "PULSE-SKIP MODE" to operate in light-load situations and "BURST MODE" to reduce current consumption further.

Application Fields of the MAX765CSA+T

Thanks to its wide input voltage range and low output voltage requirements, the MAX765CSA+T is suitable for applications such as:

• Automotive systems
• Telecom, instrumentation and industrial control systems
• Battery-powered systems
• High-current, low-power applications

In these application fields the MAX765CSA+T offers an efficient and reliable solution to power supply design, as well as attractive features such as dynamic control of the output voltage ripple, low EMI filtering, and ESD (electro-static discharge) protection.

Output Voltage: Working Principle of the MAX765CSA+T

The MAX765CSA+T output voltage (Vout) is regulated by a series of components stationed between the input and output pins of the IC. At the input end of the device, there is a voltage regulator, which receives the higher voltage from the external source and helps to accurately set the output voltage to the desired level. This is followed by a step-down converter, which converts the input voltage (Vin) to a lower output voltage (Vout) according to the power formula Vout=Vin*D, where ‘D’ is the duty cycle (usually set to 0.95). The output voltage is then regulated by a voltage regulator, which senses the output voltage and adjusts it to the desired level. Finally, an EMI (electromagnetic interference) filter positioned between the output pins helps mitigate EMI problems.

Conclusion

The MAX765CSA+T is an efficient DC DC switching regulator suitable for various applications such as automotive systems, telecom, instrumentation and industrial control systems, and battery-powered systems. It offers a reliable and cost-effective alternative to larger, external voltage regulation solutions, and its high switching frequency, low-noise and low-ripple output voltage, as well as its EMI filters make it a great choice for these application fields.

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