MAX16068 datasheet(36/40 Pages) MAXIM

Part #	MAX16068

Description	6-Channel, Flash-Configurable System Manager with Nonvolatile Fault Registers

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Manufacturer	MAXIM [Maxim Integrated Products]

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36 _____________________________________________________________________________________

6-Channel, Flash-Configurable System Manager

with Nonvolatile Fault Registers

Configuring the Device

An evaluation kit and a graphical user interface (GUI) are

available to create a custom configuration for the device

(Figure 13).

Refer to the MAX16068 Evaluation Kit for configuration.

Cascading Multiple MAX16068s

Multiple MAX16068s can be cascaded to monitor more

power supplies. There are many ways to cascade the

devices depending on the desired behavior. In general,

there are several techniques as follows:

U

Configure a GPIO on each device to be EXTFAULT

(open drain). Externally wire them together with a sin-

gle pullup resistor. Set register bits r72h[5] and r6Dh[2]

to ‘1’ so that all faults propagate between devices. If a

critical fault occurs on one device, EXTFAULT asserts,

triggering the nonvolatile fault logger in all cascaded

devices and recording a snapshot of all system volt-

ages.

U

Connect open-drain RESET outputs together to obtain

a master system reset signal.

U

Connect all EN inputs together for a master enable

signal.

Layout and Bypassing

Bypass DBP and ABP each with a 1FF ceramic capacitor

to GND. Bypass VCC with a 10FF capacitor to ground.

Avoid routing digital return currents through a sensitive

analog area, such as an analog supply input return path

or ABP’s bypass capacitor ground connection. Use

dedicated analog and digital ground planes. Connect

the capacitors as close as possible to the device.

Figure 13. Graphical User Interface Screenshot

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