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Part Number: MAX4959
Description: The MAX4959/MAX4960 overvoltage protection controllers protect low-voltage systems against high-voltag...
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MAX4959
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DataSheet
General Description
MAX4959 General Description
The MAX4959/MAX4960 overvoltage protection controllers protect low-voltage systems against high-voltage faults of up to +28V. When the input voltage exceeds the overvoltage lockout (OVLO) threshold, these devices turn off an external pFET to prevent damage to the protected components. The undervoltage lockout (UVLO) threshold holds the external pFET off until the input voltage rises to the correct level. An additional safety feature latches off the pFET when an incorrect low-power adapter is plugged in.
The MAX4959/MAX4960 control an external battery switchover pFET (P2) (see Figures 4 and 6) that switches in the battery when the AC adapter is unplugged. The undervoltage and overvoltage trip levels can be adjusted with external resistors.
The input is protected against ±15kV HBM ESD when bypassed with a 1F ceramic capacitor to ground. All devices are available in a small 10-pin (2mm x 2mm) DFN and 10-pin MAX packages and are specified for operation over the extended -40°C to +85°C temperature range.
MAX4959 Maximum Ratings
IN, SOURCE1, GATE1, GATE2, to GND ................-0.3V to +30V
VDD to GND..........................................................-0.3V to +6V
UVS, OVS, CB to GND .......................................... -0.3V to +6V
Continuous Power Dissipation (TA = +70°C)
10-pin DFN (derate 5.0mW/°C above +70°C) .........403mW
10-pin MAX (derate 5.6mW/°C above +70°C) .........444mW
Operating Temperature Range .....................-40°C to +85°C
Junction Temperature..................................................+150°C
Storage Temperature Range .......................-65°C to +150°C
Lead Temperature (soldering, 10s) .............................+300°C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. hese are stress ratings only, and functional operation of the device at these or any other conditions beyond those ndicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating onditions for extended periods may affect device reliability.
MAX4959 Features
` Overvoltage Protection Up to +28V
` ± 2.5% Accurate Externally Adjustable OVLO/UVLO Thresholds
` Battery Switchover pFET Control
` Protection Against Incorrect Power Adapter
` Low (100A Typ) Supply Current
` 25ms Input Debounce Timer
` 25ms Blanking Time
` 10-Pin (2mm x 2mm) DFN and 10-Pin MAX Packages
` ± 2.5% Accurate Externally Adjustable OVLO/UVLO Thresholds
` Battery Switchover pFET Control
` Protection Against Incorrect Power Adapter
` Low (100A Typ) Supply Current
` 25ms Input Debounce Timer
` 25ms Blanking Time
` 10-Pin (2mm x 2mm) DFN and 10-Pin MAX Packages
MAX4959 Typical Application
Notebooks
Laptops
Camcorders
Ultra-Mobile PCs
Laptops
Camcorders
Ultra-Mobile PCs
MAX4959 Connection Diagram
MAX4959ELB+
PDF/DataSheet Download
- Datasheet: MAX4959ELB+
- File Size: 343937 KB
- Manufacturer: MAXIM [Maxim Integrated Products]
- Click here to Download
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