MAX4840AEXT+T by Analog Devices

Overvoltage-Protection Controllers with Status Flag


The MAX4838A/MAX4840A/MAX4842A are overvoltage protection ICs that protect low-voltage systems against voltages of up to +28V. If the input voltage exceeds the overvoltage trip level, the MAX4838A/MAX4840A/MAX4842A turn off the low-cost external n-channel FET(s) to prevent damage to the protected components. An internal charge pump eliminates the need for external capacitors and drives the FET gate for a simple, robust solution. The MAX4838A has a 7.4V overvoltage threshold, and the MAX4840A has a 5.8V overvoltage threshold. The MAX4842A has a 4.7V overvoltage threshold. The MAX4838A/MAX4840A have an undervoltage lockout (UVLO) threshold of 3.25V while the MAX4842A has a UVLO of 2.5V. In addition to the single FET configuration, the devices can be configured with back-to-back external FETs to prevent currents from being back-driven into the adapter. On power-up, the device waits for 50ms before driving GATE high. Active-low FLAG is held low for an additional 50ms after GATE goes high before deasserting. The MAX4838A/MAX4840A/MAX4842A have an open-drain active-low FLAG output. Active-low FLAG output asserts immediately to an overvoltage fault. Additional features include a ±15kV (HBM) ESD-protected input (when bypassed with a 1µF capacitor) and a shutdown pin (active-low EN) to turn off the device. All devices are offered in a small 6-pin SC70 package and 6-pin 1.5mm x 1.0mm µDFN packages and are specified over the extended temperature range of -40°C to +85°C.

Where to Buy

Prices starting from US$1.64

Distributor Stock
Logo for Farnell
Farnell
from US$1.65
1,936
in stock
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Logo for Newark Electronics
Newark Electronics
from US$1.78
1,936
in stock
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Logo for element14
element14
from US$1.64
1,936
in stock
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Features

Overvoltage Protection Up to +28V
Preset 7.4V or 5.8V Overvoltage Trip Level
Drives Low-Cost nMOS FET
Internal 50ms Startup Delay
Internal Charge Pump
Undervoltage Lockout
±15kV ESD-Protected Input
Voltage Fault Active-Low FLAG Indicator
6-Pin SC70 Package and µDFN packages
Lead-Free

Specifications

# Channels 1
VIN (V) (min) 1.2
VIN (V) (max) 28
Over Voltage Trip Level (V) 5.8
Under Voltage Lockout (V) 3.25
VGATE (V) 10
Over Volt. Flag Open-Drain
tGATE (On) (ms) 10
tGATE (Off) (µs) 6
Package/Pins SC70/6
BudgetaryPrice (See Notes) 1.29


MAX4840AEXT+T Special Function by Analog Devices

OVERVOLTAGE PROTECTION CTRL TQFP-48

Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock

Specifications

IC Function Overvoltage Protector
Supply Voltage Min 1.2V
Supply Voltage Max 28V
IC Package Type SC-70
No. of Pins 6Pins
Operating Temperature Min -40°C
Operating Temperature Max 85°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant To Be Advised
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)

Alternative Descriptions

Overvoltage Protection Ctrl, Tqfp-48 | Newark Electronics
OVERVOLTAGE PROTECTION CTRL, TQFP-48 | element14

Frequently Asked Questions

Where can I find additional details, specifications and documents for a MAX4840AEXT+T ?

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Is the MAX4840AEXT+T RoHS compliant?

This part has not been flagged as RoHS Compliant.

Which authorised distributors for MAX4840AEXT+T have stock available?

Authorised distributors including Newark Electronics, element14 and Farnell have stock available or on a lead time for MAX4840AEXT+T .

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