MAX1837EUT33+T

Voltage - Output (Min/Fixed):	3.3V
Base Part Number:	MAX1837
Supplier Device Package:	SOT-23-6
Package / Case:	SOT-23-6
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	No
Frequency - Switching:	--
Current - Output:	250mA
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	24V
Voltage - Input (Min):	4.5V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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MAX1837EUT33+T Application Field and Working PrincipleThe MAX1837EUT33+T is a PMIC voltage regulator that utilizes DC DC switching regulators. It is an integrated power system, consisting of a high-efficiency step-down dc-dc controller, two P-channel MOSFETs and circuitry with a variety of protection features. The MAX1837EUT33+T is specifically designed to meet the requirements of automotive infotainment systems, such as audio, video, or in-vehicle infotainment (IVI) systems. This device enables high-reliability automotive applications by ensuring a high-efficiency, low-emission power system.Design Overview The MAX1837EUT33+T features a synchronous rectifier, dual-channel MOSFET driver and short-circuit, over-voltage, over-temperature and under-voltage protection. The device also includes a power stage, low-saturation voltage MOSFETs, a fully integrated switch-mode power supply, a low-noise boost converter, and a wide-input voltage operating range of 3.8V to 32V.The MAX1837EUT33+T has a maximum output current of 5.5A and a maximum output power of 25W. The device features a maximum switching frequency of 1.5MHz, allowing for a wide power stage and a high step-down ratio of up to 2:1. It has a current-mode frequency-adjustable control scheme and a typical efficiency of 95% over the entire input voltage range.Features and Benefits The MAX1837EUT33+T has several features that make it suitable for automotive infotainment systems. The device is compliant with AEC-Q100 requirements and has several safety and protection features such as output short-circuit protection, over-voltage protection, over-current protection and under-voltage lock-out (UVLO).The device also has two different operation modes. The first mode is the forced-PWM mode, which is the normal operating mode and allows for silent operation, higher efficiency and larger input range of the device. The second mode is the auto-PWM mode which enables a more efficient control scheme in applications that require a power stage efficiency of 95% or higher.The device also features a low-noise boost converter that can generate voltages up to 25V and a wide operating temperature range of -40°C to +85°C. The device is pin compatible with other MAX1837 family devices, allowing for easy design upgrade without changing the board layout.ApplicationsThe MAX1837EUT33+T is primarily designed for automotive infotainment systems such as audio, video, and in-vehicle infotainment systems. Additionally, it can be used in automotive lighting, automotive power supplies and Portable/Mobile applications that require high efficiency and high reliability.Conclusion The MAX1837EUT33+T is an integrated power system that utilizes DC-DC switching regulators, high-efficiency step-down controllers, two P-channel MOSFETs and a variety of protection features. It is designed to meet the requirements of automotive infotainment systems and is compliant with AEC-Q100 requirements. The device has a maximum output power of 25W, a maximum switching frequency of 1.5MHz and a typical efficiency of 95% over the entire input voltage range. The device is suitable for automotive infotainment systems, automotive lighting, automotive power supplies, and portable/mobile applications.

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