MAX643AEPA+

Voltage - Output (Min/Fixed):	1.31V (15V)
Base Part Number:	MAX643
Supplier Device Package:	8-PDIP
Package / Case:	8-DIP (0.300", 7.62mm)
Mounting Type:	Through Hole
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	No
Frequency - Switching:	50kHz
Current - Output:	450mA (Switch)
Voltage - Output (Max):	18V (Switch)
Series:	--
Voltage - Input (Max):	16.5V
Voltage - Input (Min):	2V
Number of Outputs:	1
Output Type:	Adjustable (Fixed)
Topology:	Boost
Output Configuration:	Positive
Function:	Step-Up
Part Status:	Active
Packaging:	Tube

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MAX643AEPA+ is a high-speed, low-power, CMOS voltage regulator designed for a wide range of commercial and industrial applications. It is a 5-pin Package with advanced features such as standby and reset functions. The MAX643AEPA+ provides an adjustable output voltage from 3V to 35V and is capable of delivering up to 600mA of output current. The MAX643AEPA+ features a unique charge pump architecture that eliminates the need for external components. This design makes the MAX643AEPA+ ideal for high-speed, low-power applications such as LCD displays, cameras, and portable computers. The MAX643AEPA+ can also be used for applications requiring low operating current and high efficiency such as cellular telephones and two-way radios.The MAX643AEPA+ utilizes a PNP transistor as the main switching element. This transistor is coupled with an internal linear regulator, which controls the output voltage to a specified value. When the output voltage drops below the set value, the linear control circuitry switches on the PNP transistor. This allows the output voltage to increase to the set point, providing stable output voltage regulation. When the output voltage reaches the set point, the linear control circuit switches off the transistor, ensuring low quiescent current draw.The MAX643AEPA+ has a low input voltage dropout and requires a minimum of 12V to 15V input voltage to maintain regulation. The device can also operate with input voltages as low as 2V. This feature makes the MAX643AEPA+ suitable for applications where the input voltage can range from various battery sources. The low input voltage dropout ensures that the power supply remains stable even when the input voltage is reduced. The MAX643AEPA+ also features a thermal protection circuit. This circuit automatically shuts down the device when the die temperature exceeds the set value, preventing thermal runaway. It also features a sleep mode, which reduces the power consumption to less than 1µA when the device is inactive. In summary, the MAX643AEPA+ is a high-speed, low-power, CMOS voltage regulator designed for a wide range of commercial and industrial applications. It provides an adjustable output voltage from 3V to 35V with an output current of up to 600mA. Its unique charge pump architecture eliminates the need for external components, making it ideal for high-speed, low power applications. Its low input voltage dropout and thermal protection circuit ensure reliable operation.

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