MAX633AESA+

Voltage - Output (Min/Fixed):	1.31V (15V)
Base Part Number:	MAX633
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
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, Charge Pump
Output Configuration:	Positive or Negative
Function:	Step-Up
Part Status:	Active
Packaging:	Tube

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PMIC - Voltage Regulators - DC DC Switching RegulatorsThe MAX633AESA+ is a synchronous DC-DC step-down regulator designed to provide higher power density, efficiency and more flexible design than conventional switching regulators. It is a highly integrated synchronous buck regulator, featuring a low-input voltage operation of 2.2V and an adjustable output voltage range of 4V to 40V. Its unique synchronous design allows for higher efficiency and power density than other comparable regulators with similar input voltages to output voltages. The MAX633AESA+ operates with Pulse Width Modulation (PWM) current-mode control with a single-ended voltage feedback system and a built-in under-voltage lockout (UVLO) with programmable hysteresis levels to ensure safe and reliable operation. The internal compensation circuitry further ensures stability and extended switching frequency range, allowing for flexible design and gradual control of transient –making the MAX633AESA+ well-suited for applications requiring low quiescent current and small package size. The MAX633AESA+ is designed to operate from a 400 kHz to 3.2 MHz switching frequency, and it can be externally synchronized for constant-frequency operation, allowing smoother current di/dt and low noise operation. The MAX633AESA+ also supports internal soft-start, complete with a slew-rate ramp generator, allowing for in-rush current limiting and adjustable current-step magnitude. For power supply design with higher reliability, the MAX633AESA+ includes multiple protection features, such as foldback over-current protection, over-temperature protection, and current mode foldback protection. These all act to ensure the safe and stable operation of the MAX633AESA+ under various conditions. The MAX633AESA+ is designed to be an advanced, low-noise, high-power- density, highly efficient, and versatile step-down regulator for a wide range of applications. It is most commonly found in applications such as notebook PCs, server baseboards, and automotive. The MAX633AESA+ offers smaller size and increased power density, so it is often used in space-constrained applications that require higher power and efficiency, such as portable audio components, medical equipment, and hub adapters. Additionally, its advanced protection and control features make it suitable for use in a variety of other demanding applications such as industrial, battery-operated equipment. In summary, the MAX633AESA+ offers a high-performance, low-input voltage synchronous DC-DC buck regulator with excellent efficiency, current-mode control and simple compensation circuitry for moderately demanding applications. Its wide input voltages and output voltage ranges make it a versatile regulator suitable for use in a variety of demanding applications. Its internal protection features, ease of implementation, and small size make it an advantageous solution for low-power, space-constrained projects.

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