MAX16025TE+ 4-Channel Voltage Monitor Adjustable Thresholds I2C Interface 2.5-5.5V Supply TQFN-16 -40°C to +125°C

MAX16025TE+ 4-Channel Voltage Monitor Adjustable Thresholds I2C Interface 2.5-5.5V Supply TQFN-16 -40°C to +125°C

Features

2.2V to 28V Operating Voltage Range

Fixed Thresholds for 3.3V, 2.5V, 1.8V, 1.5V, and 1.2V Systems

1.5% Accurate Adjustable Threshold Monitors Voltages Down to 0.5V

2.7% Accurate Fixed Thresholds Over Temperature

Fixed (140ms min)/Capacitor-Adjustable Delay Timing

Independent Open-Drain/Push-Pull Outputs

Enable Inputs for Each Monitored Voltage

9 Logic-Selectable Threshold Options

Manual Reset and Tolerance Select (5%/10%) Inputs

Small, 4mm x 4mm TQFN Package

Fully Specified from -40°C to +125°C

Applications

Multivoltage Systems

DC-DC Supplies

Servers/Workstations

Storage Systems

Networking/Telecommunication Equipment

Description

The MAX16025–MAX16030 are dual-/triple-/quad-volt age monitors and sequencers that are offered in a small TQFN package. These devices offer enormous design flexibility as they allow fixed and adjustable thresholds to be selected through logic inputs and pro vide sequence timing through small external capaci tors. These versatile devices are ideal for use in a wide variety of multivoltage applications.

As the voltage at each monitored input exceeds its respective threshold, its corresponding output goes high after a propagation delay or a capacitor-set time delay. When a voltage falls below its threshold, its respective output goes low after a propagation delay. Each detector circuit also includes its own enable input, allowing the power-good outputs to be shut off inde pendently. The independent output for each detector is available with push-pull or open-drain configuration with the open-drain version capable of supporting volt ages up to 28V, thereby allowing them to interface to shutdown and enable inputs of various DC-DC regula tors. Each detector can operate independently as four separate supervisory circuits or can be daisy-chained to provide controlled power-supply sequencing.

The MAX16025–MAX16030 also include a reset func tion that deasserts only after all of the independently monitored voltages exceed their threshold. The reset timeout is internally fixed or can be adjusted externally. These devices are offered in a 4mm x 4mm TQFN package and are fully specified from -40°C to +125°C.

INFORMATION

Drawing

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