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MAX4923, MAX4924, MAX4925, MAX4926
Overvoltage Protectors with External pFET
Provides Overvoltage Protection for up to +28V
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Status
| Part Number |
Status |
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MAX4923
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Future Product |
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MAX4924
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Active: In Production. |
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MAX4925
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Active: In Production. |
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MAX4926
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Active: In Production. |
Description
The MAX4923–MAX4926 overvoltage protection
(OVP) controllers protect low-voltage systems against
high-voltage faults of up to +28V with an appropriate
external pFET. When the input voltage exceeds the overvoltage
lockout (OVLO) threshold, or falls below the
undervoltage lockout (UVLO) threshold, these devices
turn off the pFET to prevent damage to protected components
and issue a flag to notify the processor of a fault
condition.
The typical overvoltage trip level is set to 7.18V
(MAX4923), 6.16V (MAX4924), 5.65V (MAX4925), and
4.46V (MAX4926). The undervoltage trip level is set to
2.44V (typ) for all devices.
The input (IN) is ESD protected to ±15kV HBM when
bypassed to ground with a 1µF ceramic capacitor. All
devices are offered in a small, 6-pin (1.5mm x 1.0mm)
µDFN package and are specified 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
- Preset 7.18V, 6.16V, 5.65V, and 4.46V Typical Overvoltage Trip Levels
- Preset 2.44V Typical Undervoltage Trip Level
- ±2.5% Accurate Overvoltage/Undervoltage Trip Levels
- Low 13µA (typ) Supply Current
- Drives External pFET
- 20ms Adapter Debounce Time
- Fault Flag Indicator
- 6-Pin (1.5mm x 1.0mm) µDFN Package
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Applications/Uses
- Cell Phones
- Digital Still Cameras
- MP3 Players
- PDAs and Palmtop Devices
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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) |
Over Volt. Flag |
tGATE (On)
(ms) |
tGATE (Off)
(µs) |
Package/Pins |
Budgetary Price |
| min |
max |
See Notes |
| MAX4923 |
1 |
1.8 |
28 |
7.18 |
2.44 |
Open-Drain |
20 |
5 |
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- |
| MAX4924 |
6.15 |
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$0.94 @1k |
| MAX4925 |
5.65 |
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$0.94 @1k |
| MAX4926 |
4.46 |
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$0.94 @1k |
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See All Overvoltage Protection Controllers (61)
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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
Didn't Find What You Need?
Information Index
Document Ref.: 19-0810
Rev 0;
2007-05-16
This page last modified: 2009-08-18
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