MAX8546EUB+T

Frequency - Switching:	300kHz
Base Part Number:	MAX8546
Supplier Device Package:	10-uMAX
Package / Case:	10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
Operating Temperature:	-40°C ~ 85°C (TA)
Control Features:	Enable
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	86%
Series:	--
Voltage - Supply (Vcc/Vdd):	2.7 V ~ 28 V
Output Phases:	1
Number of Outputs:	1
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The MAX8546EUB+T is a flexible, high-performance, low-voltage DC-DC switching controller specifically designed for applications that require integrated current, voltage or temperature protection. It utilizes a digital control loop and integrated intelligence to provide optimal efficiency, flexibility and power control. It is well suited for high-powered applications such as automotive, industrial, IT, consumer, and medical.

Features

The MAX8546EUB+T offers many features, including but not limited to:- Digital Control Loop: Integrated digital control loop for controlling output voltage and current to meet precision specifications.- Fault Detection: Programmable current, voltage, and temperature-based fault protection with adjustable threshold settings. - Voltage Scaling: Dynamic voltage scaling to improve efficiency at lower input voltages. - Slew Rate Control: Adjustable slew rate control for increased efficiency. - Output Voltage Protection: Programmable output voltage protection for preventing excessive output voltages. - Output Current Protection: Programmable current limit for current inrush protection.

Applications

The MAX8546EUB+T is ideal for applications requiring high-efficiency, small form factor, and high output current capability with voltage and current monitoring. It is ideal for automotive and industrial applications such as DC/DC converters, battery management, LED lighting, and motor control, as well as consumer and IT applications such as set-top boxes, PCs, and gaming systems.

Working Principle

The MAX8546EUB+T is a synchronous switchmode DC-DC converter controller optimized to provide high efficiency, high output current capability and high line regulation, with adjustable slew rate control. It utilizes a three-phase, fixed-frequency, PWM switching technique and features a dedicated output voltage error amplifier. The input voltage, output voltage, and efficiency of the system are directly related to the PWM switching frequency.The controller features a Line Voltage Feed Forward (LVFF) circuit to improve the line and load regulation capability. The LVFF circuit measures the input voltage applied to the load, and adjusts the loop control logic to achieve better control of the power supply.The controller also provides a low-side current limit, adjustable over-voltage protection, and a thermal protection circuit. The low-side current limit prevents excessive current in the output circuit when sudden changes in the output voltage occur. The over-voltage protection and thermal protection circuits help to ensure safe operation of the system.The MAX8546EUB+T is designed to operate with a wide input voltage range, up to 32V, at a switching frequency of 1.0MHz or 2.2MHz. The MAX8546EUB+T offers excellent efficiency, with a minimum efficiency of 90%.

Conclusion

The MAX8546EUB+T is an excellent choice for a wide range of applications requiring high-efficiency and high-current output capability. With its integrated digital control loop and integrated intelligence, it provides optimal efficiency, flexibility and power control. It is ideal for automotive and industrial applications such as DC/DC converters, battery management, LED lighting, and motor control. It is also suitable for consumer and IT applications such as set-top boxes, PCs, and gaming systems.

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