MAX6722AUTTWD1+T

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Type:	Multi-Voltage Supervisor
Number of Voltages Monitored:	2
Output:	Push-Pull, Totem Pole
Reset:	Active Low
Reset Timeout:	1.1 ms Minimum
Voltage - Threshold:	1.665V, 3.075V
Operating Temperature:	-40°C ~ 125°C (TA)
Mounting Type:	Surface Mount
Package / Case:	SOT-23-6
Supplier Device Package:	SOT-23-6
Base Part Number:	MAX6722A

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Introduction
MAX6722AUTTWD1+T is a low-cost integrated circuit (IC) for the power monitoring and protection of modern electronic systems. It is a component of the Pericom Semiconductor’s Programmable Supervisor product family. It features a power-good indication, reset output, as well as reset input, temperature monitoring/protection, low-dropout linear regulators, adjustable overvoltage/undervoltage indicator, watchdog timer and more. This unit is available in a 16-lead TSSOP (thin shrunk small outline package).

Application Field
The MAX6722AUTTWD1+T is an ideal power management solution for power-sensitive digital systems in various embedded applications. It is designed for various devices such as cell phones, PDAs, digital cameras, MP3 players and many more. This IC can also be used in industrial systems and automotive applications where dependable power is essential.

Working Principle
The MAX6722AUTTWD1+T monitors the power supply for a degree of accuracy and stability. It has both positive and negative voltage monitoring capability. In order to ensure correct voltage levels, it has an adjustable overvoltage/undervoltage level detection circuit. When the input voltage drops low or rises high than the set threshold, the reset output is driven low and the power-good output (PGO) is driven high. The reset output remains low until the input voltage is within the set limits and a reset pulse is generated.

The MAX6722AUTTWD1+T also has a temperature protection/monitoring feature that provides thermal shutdown protection for critical components in the system. This IC provides temperature monitoring and protection (TMP) of the following types of devices: junction temperature-sensitive transistors or diodes, analog components and digital ICs. The resistor network sets the maximum temperature that can be achieved before the IC goes into thermal shutdown. When the IC temperature reaches the set threshold, it will shut down the IC and the reset output is driven low.

The MAX6722AUTTWD1+T features an adjustable precision low-dropout linear regulator that can operate as a standalone power supply. It is a fixed-output voltage linear regulator that has two power-supply pins: VCC and VOUT. The VOUT voltage can be adjusted on the device by setting the output voltage on the reference pin. The linear regulator operates at sub-3V input voltage and has a voltage-dropout voltage depending on the load current. It is designed to provide a regulated and stable output voltage.

The MAX6722AUTTWD1+T also features a watchdog timer for time-out protection. The watch dog timer will generate a reset output if the timer ever fails. It can be used to protect against system hang or crash due to code, software, or hardware errors. The watch dog timer can be periodically reset by a pulse from the system controller to reset the timer, or it can be disabled.

The MAX6722AUTTWD1+T provides system level reset which will reset the entire system if the reset button is pressed. It is an active high open drain output that can be pulled high by the user. It is designed to reset all devices on the board, including CPUs, memory, power, and peripherals.

In summary, the MAX6722AUTTWD1+T is a power monitoring and protection IC ideal for embedded applications. It features adjustable overvoltage/undervoltage detection, temperature protection/monitoring, low-dropout linear regulator, watchdog timer, and system level reset. This IC is suitable for a wide range of applications, including cell phones, PDAs, digital cameras, MP3 players, industrial and automotive systems.

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