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MAX4959, MAX4960
High-Voltage OVP with Battery Switchover
High-Voltage OVP Providing Overvoltage Lockout and Undervoltage Lockout with Battery Switchover
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Status
Active: In Production.
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 in the full data sheet) 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 1µF ceramic capacitor to ground. All devices are available in a small 10-pin (2mm x 2mm) µDFN and 10-pin µMAX® packages and are specified for operation over the extended -40°C to +85°C temperature range.
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Data Sheet
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Key Features
- Overvoltage Protection Up to +28V
- ±2.5% Accurate Externally Adjustable OVLO/UVLO Thresholds
- Battery Switchover pFET Control
- Protection Against Incorrect Power Adapter
- Low (100µA Typ) Supply Current
- 25ms Input Debounce Timer
- 25ms Blanking Time
- 10-Pin (2mm x 2mm) µDFN and 10-Pin µMAX Packages
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Applications/Uses
- Camcorders
- Laptops
- Notebooks
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Key Specifications:
| Overvoltage Protection Controllers |
| Part Number |
Channels |
VIN
(V) |
VIN
(V) |
Over Voltage Trip Level
(V) |
Under Voltage Lockout
(V) |
Package/Pins |
Budgetary Price |
| min |
max |
See Notes |
| MAX4959 |
1 |
4 |
28 |
Adjustable |
1.2 |
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$1.21 @1k |
| MAX4960 |
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$1.21 @1k |
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See All Overvoltage Protection Controllers (60)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
Typical Operating Circuit
More Information
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Information Index
Document Ref.: 19-0874
Rev 0;
2007-08-28
This page last modified: 2009-08-31
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