MAX1946ETA+T by Analog Devices

Single USB Switch with Autoreset and Fault Blanking in Tiny TDFN


The MAX1946 single current-limited switch with auto-reset supplies a guaranteed 500mA load in accordance with USB specifications. The MAX1946 operates from a 2.7V to 5.5V input supply and consumes only 40µA of quiescent current when operating and only 3µA in shutdown. Selectable active-high/active-low control logic and shutdown control provide additional flexibility. An autoreset feature latches the switch off in the event of a short circuit, saving system power. The switch reactivates upon removal of the shorted condition. The MAX1946 provides several safety features to protect the USB port. Built-in thermal-overload protection turns off the switch when the die temperature exceeds +160°C. Accurate internal current-limiting circuitry protects the input supply against both overload and short-circuit conditions. An open-drain fault signal, (active-low FAULT), notifies the microprocessor (µP) when a thermal overload, current-limit, undervoltage lockout (UVLO), or short-circuit fault occurs. A 20ms fault-blanking feature enables the circuit to ignore momentary faults, such as those caused when hot-swapping a capacitive load, preventing false alarms to the host system. The fault-blanking feature prevents fault signals from being issued when the device powers up the load. The MAX1946 is available in a space-saving 8-pin (3mm x 3mm) TDFN package and operates over the extended (-40°C to +85°C) temperature range.

Where to Buy

Prices starting from US$0.89

Distributor Stock
Logo for RS
RS
from US$0.89
2,130
in stock
Buy Now
Logo for Newark Electronics
Newark Electronics
from US$0.96
4,127
in stock
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Logo for element14
element14
from US$1.02
4,127
in stock
Buy Now
Logo for Farnell
Farnell
from US$0.91
4,127
in stock
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Features

Single USB Switch in 3mm x 3mm Package
Autoreset Feature Saves System Power
Guaranteed 500mA Load Current
Built-In 20ms Fault-Blanking Circuitry
Active-High or Active-Low Control Logic
Fully Compliant to USB Specifications
2.7V to 5.5V Input Voltage Range
Fault-Indicator Output
Thermal-Overload Protection

Specifications

Current Limit (mA) (min) 740
Current Limit (mA) (max) 740
# Power Switches 1
USB Yes
Fault Indicator Yes
Current Limit Accuracy (%) 24
Current Limit Set By Preset
RON (Ω) (typ) 0.075
VSUPPLY (V) (min) 2.7
VSUPPLY (V) (max) 5.5
Oper. Temp. (°C) -40 to +85
Package/Pins TDFN/8
BudgetaryPrice (See Notes) 0.65


MAX1946ETA+T Special Function by Analog Devices

USB SWITCH W/AUTORESET TDFN-8

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

Specifications

IC Function Current Limited Switch
Supply Voltage Min 2.7V
Supply Voltage Max 5.5V
IC Package Type TDFN
No. of Pins 8Pins
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

Usb Switch W/Autoreset, Tdfn-8 | Newark Electronics
USB SWITCH W/AUTORESET, TDFN-8 | element14
Single USB Switch Autoreset | RS

Frequently Asked Questions

Where can I find additional details, specifications and documents for a MAX1946ETA+T ?

Additional datasheets, footprints and schematics for MAX1946ETA+T are listed on our Part Details page. You can also find images and similar parts to MAX1946ETA+T on this page.

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Distributor pricing and stock information is available for MAX1946ETA+T on our Product Comparison page. Access via the 'View Pricing & Stock' button to view MAX1946ETA+T price breaks, MOQs, lead times, inventory and SKUs from distributors.

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Is the MAX1946ETA+T RoHS compliant?

This part has not been flagged as RoHS Compliant.

Which authorised distributors for MAX1946ETA+T have stock available?

Authorised distributors including Newark Electronics, element14, Farnell and RS have stock available or on a lead time for MAX1946ETA+T .

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