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MAX1946ETA+

Description
Single USB Switch with Autoreset and Fault Blanking in Tiny TDFN
CategoryPower/power management    The power supply circuit   
File Size265KB,13 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
Environmental Compliance
Download Datasheet Parametric Compare View All

MAX1946ETA+ Overview

Single USB Switch with Autoreset and Fault Blanking in Tiny TDFN

MAX1946ETA+ Parametric

Parameter NameAttribute value
Is it lead-free?Lead free
Is it Rohs certified?conform to
MakerMaxim
Parts packaging codeDFN
package instructionHVSON, LCC8,.12SQ
Contacts8
Reach Compliance Codecompli
ECCN codeEAR99
Factory Lead Time6 weeks
Samacsys DescriptiSingle USB Switch with Autoreset and Fault Blanking in Tiny TDFN
Adjustable thresholdNO
Analog Integrated Circuits - Other TypesPOWER SUPPLY SUPPORT CIRCUIT
JESD-30 codeS-PDSO-N8
JESD-609 codee3
length3 mm
Humidity sensitivity level1
Number of channels1
Number of functions1
Number of terminals8
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Package body materialPLASTIC/EPOXY
encapsulated codeHVSON
Encapsulate equivalent codeLCC8,.12SQ
Package shapeSQUARE
Package formSMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)260
power supply3/5 V
Certification statusNot Qualified
Maximum seat height0.8 mm
Maximum supply current (Isup)0.06 mA
Maximum supply voltage (Vsup)5.5 V
Minimum supply voltage (Vsup)2.7 V
Nominal supply voltage (Vsup)5 V
surface mountYES
technologyBICMOS
Temperature levelINDUSTRIAL
Terminal surfaceMatte Tin (Sn)
Terminal formNO LEAD
Terminal pitch0.65 mm
Terminal locationDUAL
Maximum time at peak reflow temperature30
width3 mm
19-2550; Rev 3; 2/10
Single USB Switch with Autoreset and
Fault Blanking in Tiny TDFN
General Description
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 shut-
down. 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 reacti-
vates upon removal of the shorted condition.
The MAX1946 provides several safety features to pro-
tect the USB port. Built-in thermal-overload protection
turns off the switch when the die temperature exceeds
+160°C. Accurate internal current-limiting circuitry pro-
tects the input supply against both overload and short-
circuit conditions. An open-drain fault signal, (FAULT),
notifies the microprocessor (µP) when a thermal over-
load, 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.
Features
o
Single USB Switch in 3mm x 3mm Package
o
Autoreset Feature Saves System Power
o
Guaranteed 500mA Load Current
o
Built-In 20ms Fault-Blanking Circuitry
o
Active-High or Active-Low Control Logic
o
Fully Compliant to USB Specifications
o
2.7V to 5.5V Input Voltage Range
o
Fault-Indicator Output
o
Thermal-Overload Protection
MAX1946
Ordering Information
PART
MAX1946ETA+
TEMP RANGE
-40°C to +85°C
PIN-
PACKAGE
8 TDFN-EP*
TOP MARK
ACQ
Applications
USB Ports and USB Hubs
Notebook and Desktop Computers
PDAs and Palmtop Computers
Digital Cameras
Docking Stations
+Denotes
a lead(Pb)-free/RoHS-compliant package.
*EP
= Exposed paddle.
Pin Configuration
TOP VIEW
+
FAULT
1
GND
2
OUT
3
OUT
4
8
SEL
INPUT
2.7V TO 5.5V
Typical Operating Circuit
IN
IN
FAULT
MAX1946
7
ON
6
IN
5
IN
ACTIVE HIGH
ACTIVE LOW
SELECTABLE
ON
SEL
GND
MAX1946
OUT
OUT
TDFN
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.

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