MAX17559ACJ+

Voltage - Supply (Vcc/Vdd):	4.5 V ~ 60 V
Supplier Device Package:	32-TQFP (7x7)
Package / Case:	32-TQFP
Operating Temperature:	-40°C ~ 125°C (TJ)
Control Features:	Current Limit, Enable, Frequency Control, Power Good, Soft Start
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	--
Frequency - Switching:	100kHz ~ 2.2MHz
Series:	--
Output Phases:	2
Number of Outputs:	2
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tray

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Introduction

The MAX17559ACJ+ is a family of integrated power management ICs (PMICs) designed to provide robust, reliable, and efficient regulated power supplies to system components. It belongs to the DC/DC switching controllers family of voltage regulators. The MAX17559AC offers a wide variety of features, including dual output system, built-in over-temperature protection and under-voltage lockout. It is an ideal choice for mobile and consumer applications requiring voltage regulation and accurate current limiting.

Features

The MAX17559ACJ+ offers a wide variety of features for cost-effective power supply solutions. These features include:

• Two system outputs that provide adjustable output voltages from 0.6V to 5V
• Built-in over-temperature and under-voltage lockout
• Integrated one-time programmable (OTP) memory for storing precision settings, eliminating the need for external trimming
• Adaptive on-time control allows optimized transient response with minimal output voltage ripple
• Recommended feedback network accepts 1.2V or 2.5V reference and complete transient protection, including up to 60V transients
• Programmable maximum duty cycle limit and overcurrent protection

Application Field

The MAX17559ACJ+ is suitable for a wide range of applications, including mobile and consumer applications where accurate voltage regulation and current limiting are necessary. It is ideal for industrial systems and portable medical instruments. It can also be used in automotive and automotive infotainment systems, such as GPS navigation and in-car entertainment systems.

Working Principle

The MAX17559ACJ+ uses a control principle called an active-state control (ASC) to generate an output voltage that is proportional to its reference voltage (VREF). The ASC principle is based on the integration of a current mirror, feedback amplifier, and error amplifier along with a PWM (pulse width modulation) control circuit. When the IC is enabled, it operates in a voltage-mode where the error amplifier monitors the output voltage and adjusts the duty cycle of the PWM signal accordingly. The duty cycle is set for a desired output voltage level and allows for rapid load and line transients. To prevent instability, the MAX17559ACJ+ has an adaptive on-time control (ATC) circuit. This circuit evaluates the frequency of the PWM signal and truncates the duty cycle if the on-time exceeds a certain limit. This ensures accurate regulation and protection against short-circuits or open-load conditions. In addition, the MAX17559ACJ+ has a low-quiescent current monitoring feature that allows it to enter a sleep mode during low-load current conditions. This helps to conserve power and reduce system power consumption.

Conclusion

The MAX17559ACJ+ is an ideal choice for mobile and consumer applications requiring voltage regulation and accurate current limiting. It offers a wide range of features, including a dual output system, built-in over-temperature protection and under-voltage lockout. It has integrated OTP memory for storing precision settings which eliminates the need for external trimming. Furthermore, it has an adaptive on-time control circuit which ensures accurate regulation and protection against short-circuits. Lastly, it has a low-quiescent current monitoring feature that helps to conserve system power.

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