MAX5037ETH-T

Frequency - Switching:	250kHz, 500kHz
Base Part Number:	MAX5037
Supplier Device Package:	44-TQFN-EP (7x7)
Package / Case:	44-WFQFN Exposed Pad
Operating Temperature:	-40°C ~ 85°C (TA)
Control Features:	Enable, Phase Control, Power Good
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	--
Series:	--
Voltage - Supply (Vcc/Vdd):	4.75 V ~ 28 V
Output Phases:	2
Number of Outputs:	2
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Discontinued at Digi-Key
Packaging:	Tape & Reel (TR)

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Introduction

The MAX5037ETH-T is a high efficiency, high density, voltage-mode switching regulator controller that can be used in a variety of applications. It is a member of the PMIC (Power Management Integrated Circuit) family, specifically, the Voltage Regulators > DC-DC Switching Controllers Category. This voltage regulator controller is capable of providing a higher speed response and higher current successively than other such controllers.

Features

The MAX5037ETH-T is capable of operating over a wide voltage range, from +2.7V to +6V, it can sustain a supply current as high as 140mA and has a switching frequency range of 200kHz to 2MHz. The adjustable dead-time control (programmable via external voltage) means that it is suitable for use in high frequency applications. Additionally, it features a soft-start mode, a Power Good output, and an adjustable frequency control.The MAX5037ETH-T also offers a wide range of protection features. These include; under-voltage lockout (UVLO), cycle-by-cycle current limit, over-current protection, over-voltage protection (OVP), and overtemperature protection (OTP). This controller also features a unique PAR-Latched Hiccup feature which prevents short-term over-currents from damaging the controller. Its internal soft-start provides a controlled in-rush current limiting and its adjustable dead-time feature provides a fast transient response resulting in high efficiency operation.

Applications

The MAX5037ETH-T is suitable for use in a variety of applications. These include DC/DC converters, power regulators, and power supplies. It is particularly suitable for PFC pre-regulator applications, particularly those using high frequency switching techniques. Furthermore, its wide range of protection features make it well-suited for applications where low EMI noise generation and high reliability are of paramount importance.

Working Principle

The MAX5037ETH-T is a voltage mode switching regulator controller. Its operation is based on the principle of pulse width modulation (PWM), which is used to control the output voltage. When the MAX5037ETH-T device is enabled, it initiates the PWM process. During the PWM process, a triangle wave generator produces a triangular waveform with a slope that is proportional to the reference voltage.The controller compares the triangular waveform with the feedback voltage in order to determine the duty cycle that will maintain the desired output voltage. If the output voltage is higher than the reference voltage, the duty cycle of the PWM is decreased; if the output voltage is lower than the reference voltage, the duty cycle of the PWM is increased. This process continues until the desired output voltage is maintained.The MAX5037ETH-T provides a number of advanced features to allow it to be used in a range of applications. These include; adjustable dead-time control, adjustable frequency control, soft-start mode, power good output, PAR-Latched Hiccup, cycle-by-cycle current limit, over-voltage protection and over-temperature protection.

Conclusion

The MAX5037ETH-T is a high efficiency, high density voltage-mode switching regulator controller. It is a member of the PMIC (Power Management Integrated Circuit) family and can be used in a variety of applications, including DC/DC converters, power regulators and power supplies. Its operating principle is based on the use of pulse width modulation (PWM) and its features include adjustable dead-time control, adjustable frequency control, soft-start mode, power good output, PAR-Latched Hiccup, cycle-by-cycle current limit, over-voltage protection and over-temperature protection. The MAX5037ETH-T is a versatile and reliable switching regulator controller, capable of providing high efficiency and high performance in an extensive range of applications.

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