MAX4844ELT+T

MAX4844ELT+T Datasheet

The overvoltage trip level is set to 7.4V MAX4843 , 6.35V MAX4844 , 5.8V MAX4845 , or 4.65V MAX4846 . When the input voltage drops below the undervoltage lockout UVLO threshold, the devices enter a low standby current mode 10µA . The MAX4843/MAX4844/MAX4845 have a UVLO threshold of 4.15V, the MAX4845C/MAX4845D have a UVLO threshold of 2.2V, and the MAX4846 has a UVLO threshold of 2.5V. In addition to the single FET configuration, the devices can be configured with back-toback external FETs to prevent currents from being back-driven into the adapter.

Part	Datasheet
MAX4844ELT+T	MAX4844ELT+T (pdf)

Related Parts	Information
MAX4845CEYT+	MAX4845CEYT+
MAX4845ELT+T	MAX4845ELT+T
MAX4845DEYT+T	MAX4845DEYT+T
MAX4846ELT+T	MAX4846ELT+T
MAX4845DEYT+	MAX4845DEYT+
MAX4846ELT+TG104	MAX4846ELT+TG104
MAX4845EYT+T	MAX4845EYT+T
MAX4845EYT+	MAX4845EYT+
MAX4845EYT+C5Y	MAX4845EYT+C5Y
MAX4845CEYT+T	MAX4845CEYT+T

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Overvoltage Protection Controllers with Low Standby Current The overvoltage protection controllers protect low-voltage systems against high-voltage faults of up to 28V. When the input voltage exceeds the overvoltage threshold, these devices turn off a 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 overvoltage trip level is set to 7.4V MAX4843 , 6.35V MAX4844 , 5.8V MAX4845 , or 4.65V MAX4846 . When the input voltage drops below the undervoltage lockout UVLO threshold, the devices enter a low standby current mode 10µA . The MAX4843/MAX4844/MAX4845 have a UVLO threshold of 4.15V, the MAX4845C/MAX4845D have a UVLO threshold of 2.2V, and the MAX4846 has a UVLO threshold of 2.5V. In addition to the single FET configuration, the devices can be configured with back-toback external FETs to prevent currents from being back-driven into the adapter. An additional feature includes a ±15kV ESD-protected input when bypassed with a 1µF capacitor to ground. All devices are offered in small 6-pin µDFN 1.5mm x 1.0mm and 6-pin ultra-thin LGA MAX4845 and MAX4846 only 1.5mm x 1.0mm packages and are specified for operation over the -40°C to +85°C temperature range. Cell Phones Digital Still Cameras PDAs and Palmtop Devices MP3 Players Typical Operating Circuit Overvoltage Protection Up to 28V Preset 7.4V, 6.35V, 5.8V, or 4.65V Overvoltage Trip Level Low 10µA Undervoltage Lockout Standby Current Drives Low-Cost nMOSFET Internal 50ms Startup Delay Internal Charge Pump Overvoltage Fault FLAG Indicator 6-Pin 1.5mm x 1.0mm µDFN Package Ordering Information PART PIN- UVLO OVLO TOP PACKAGE V MARK MAX4843ELT MAX4844ELT MAX4845ELT MAX4845EYT+T 6 uDFN 6 uDFN 6 uDFN 6 UTLGA MAX4845CEYT+T 6 UTLGA MAX4845DEYT+T 6 UTLGA AP AQ MAX4846ELT MAX4846EYT+T 6 uDFN 6 UTLGA Note All devices are specified over the -40°C to +85°C temperature range. +Denotes a lead Pb -free/RoHS-compliant package. T = Tape and reel. †OVLO maximum is 6.0V for the MAX4845C and 5.9V for the MAX4845D. Pin Configurations INPUT +1.2V TO +28V GATE 4 MAX4846 2 GND FLAG 3 OUTPUT TOP VIEW N.C. 6 N.C. GATE MAX4846 GND FLAG uDFN N.C. N.C. GATE MAX4845 MAX4846 GND FLAG ULTRA-THIN LGA 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 Overvoltage Protection Controllers with Low Standby Current ABSOLUTE MAXIMUM RATINGS IN to GND to +30V GATE to GND to +12V FLAG to GND to +6V Continuous Power Dissipation TA = +70°C 6-Pin µDFN derate 2.1mW/°C above +70°C .........167.7mW 6-Pin Ultra-Thin LGA derate 2.1mW/°C above +70°C Operating Temperature Range ..........................-40°C to +85°C Junction Temperature +150°C Storage Temperature Range ............................-65°C to +150°C Soldering Temperature reflow 6-Pin 6-Pin Ultra-Thin LGA Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS VIN = +5V for MAX4843/MAX4844/MAX4845, VIN = +4V for MAX4846, CGATE = 500pF, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C. Note 1 PARAMETER CONDITIONS Input Voltage Range MAX4843/MAX4844/MAX4845 Undervoltage Lockout Threshold UVLO VIN falling MAX4845C/MAX4845D MAX4846 Undervoltage Lockout Hysteresis MAX4843/MAX4844/MAX4845 MAX4846 MAX4843 MAX4844 MAX4845 Overvoltage Trip Level OVLO VIN rising MAX4845C MAX4845D MAX4846 MAX4843 Overvoltage Lockout Hysteresis MAX4844 MAX4845 MAX4846 IN Supply Current UVLO Supply Current Gate Voltage MAX4843/MAX4844/MAX4845 MAX4846 IUVLO VIN = 3.8V MAX4843/MAX4844/MAX4845 VIN = 2.2V MAX4846 MAX4843/MAX4844/MAX4845 9 VGATE 1uA load MAX4846 GATE Pulldown Current IPD VIN > OVLO, VGATE = 5.5V FLAG Output Low Voltage VOL ISINK = 1mA, FLAG deasserted Added MAX4845A and MAX4845C to Ordering Information and Electrical Characteristics. • Removed MAX4845A and added MAX4845D to Ordering Information and Electrical Characteristics. • Updated Undervoltage Lockout UVLO section under Detailed Description to include MAX4845D. PAGES CHANGED 1, 2, 4, 7, 9 1, 2, 6 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 10 Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 2009 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.

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Overvoltage Protection Controllers with Low Standby Current

The overvoltage protection controllers protect low-voltage systems against high-voltage faults of up to 28V. When the input voltage exceeds the overvoltage threshold, these devices turn off a 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 overvoltage trip level is set to 7.4V MAX4843 , 6.35V MAX4844 , 5.8V MAX4845 , or 4.65V MAX4846 . When the input voltage drops below the undervoltage lockout UVLO threshold, the devices enter a low standby current mode 10µA . The MAX4843/MAX4844/MAX4845 have a UVLO threshold of 4.15V, the MAX4845C/MAX4845D have a UVLO threshold of 2.2V, and the MAX4846 has a UVLO threshold of 2.5V. In addition to the single FET configuration, the devices can be configured with back-toback external FETs to prevent currents from being back-driven into the adapter.

An additional feature includes a ±15kV ESD-protected input when bypassed with a 1µF capacitor to ground. All devices are offered in small 6-pin µDFN 1.5mm x 1.0mm and 6-pin ultra-thin LGA MAX4845 and MAX4846 only 1.5mm x 1.0mm packages and are specified for operation over the -40°C to +85°C temperature range.

Cell Phones

Digital Still Cameras

PDAs and Palmtop Devices

MP3 Players

Typical Operating Circuit

Overvoltage Protection Up to 28V Preset 7.4V, 6.35V, 5.8V, or 4.65V Overvoltage Trip

Level Low 10µA Undervoltage Lockout Standby

Current Drives Low-Cost nMOSFET Internal 50ms Startup Delay Internal Charge Pump Overvoltage Fault FLAG Indicator 6-Pin 1.5mm x 1.0mm µDFN Package
Ordering Information

PART

PIN-

UVLO OVLO TOP

PACKAGE

V MARK

MAX4843ELT MAX4844ELT MAX4845ELT MAX4845EYT+T
6 uDFN 6 uDFN 6 uDFN 6 UTLGA

MAX4845CEYT+T 6 UTLGA MAX4845DEYT+T 6 UTLGA

AP AQ

MAX4846ELT MAX4846EYT+T
6 uDFN 6 UTLGA

Note All devices are specified over the -40°C to +85°C temperature range. +Denotes a lead Pb -free/RoHS-compliant package. T = Tape and reel. †OVLO maximum is 6.0V for the MAX4845C and 5.9V for the MAX4845D.

Pin Configurations

INPUT
+1.2V TO +28V

GATE 4

MAX4846
2 GND

FLAG 3

OUTPUT

TOP VIEW

N.C. 6

N.C. GATE

MAX4846

GND FLAG
uDFN

N.C. N.C. GATE

MAX4845 MAX4846

GND FLAG

ULTRA-THIN LGA

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

Overvoltage Protection Controllers with Low Standby Current

ABSOLUTE MAXIMUM RATINGS

IN to GND to +30V GATE to GND to +12V FLAG to GND to +6V Continuous Power Dissipation TA = +70°C
6-Pin µDFN derate 2.1mW/°C above +70°C .........167.7mW 6-Pin Ultra-Thin LGA derate 2.1mW/°C above +70°C

Operating Temperature Range ..........................-40°C to +85°C Junction Temperature +150°C Storage Temperature Range ............................-65°C to +150°C Soldering Temperature reflow
6-Pin 6-Pin Ultra-Thin LGA

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

ELECTRICAL CHARACTERISTICS

VIN = +5V for MAX4843/MAX4844/MAX4845, VIN = +4V for MAX4846, CGATE = 500pF, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C. Note 1

PARAMETER

CONDITIONS

Input Voltage Range

MAX4843/MAX4844/MAX4845

Undervoltage Lockout Threshold UVLO VIN falling MAX4845C/MAX4845D

MAX4846

Undervoltage Lockout Hysteresis

MAX4843/MAX4844/MAX4845 MAX4846

MAX4843

MAX4844

MAX4845

Overvoltage Trip Level

OVLO VIN rising

MAX4845C

MAX4845D

MAX4846

MAX4843

Overvoltage Lockout Hysteresis

MAX4844 MAX4845

MAX4846

IN Supply Current UVLO Supply Current Gate Voltage

MAX4843/MAX4844/MAX4845

MAX4846

IUVLO

VIN = 3.8V MAX4843/MAX4844/MAX4845 VIN = 2.2V MAX4846

MAX4843/MAX4844/MAX4845 9

VGATE 1uA load MAX4846

GATE Pulldown Current

IPD VIN > OVLO, VGATE = 5.5V

FLAG Output Low Voltage

VOL ISINK = 1mA, FLAG deasserted
Added MAX4845A and MAX4845C to Ordering Information and Electrical Characteristics.
• Removed MAX4845A and added MAX4845D to Ordering Information and Electrical Characteristics.
• Updated Undervoltage Lockout UVLO section under Detailed Description to include MAX4845D.

PAGES CHANGED
1, 2, 4, 7, 9
1, 2, 6

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
10 Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
2009 Maxim Integrated Products

Maxim is a registered trademark of Maxim Integrated Products, Inc.

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived MAX4844ELT+T Datasheet file may be downloaded here without warranties.

Datasheet ID: MAX4844ELT+T 647357