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MAX4866LEUT+T

更新时间： 2024-11-02 13:00:43
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19-3582; Rev 1; 5/06  
Overvoltage Protection Controllers  
with Reverse Polarity Protection  
General Description  
Features  
The MAX4864L/MAX4865L/MAX4866L/MAX4867/  
MAX4865/MAX4866 overvoltage protection controllers  
protect low-voltage systems against high-voltage faults  
up to +28V, and negative voltages down to -28V. These  
devices drive a low-cost complementary MOSFET. If the  
input voltage exceeds the overvoltage threshold, these  
devices turn off the n-channel MOSFET to prevent dam-  
age to the protected components. If the input voltage  
drops below ground, the devices turn off the p-channel  
MOSFET to prevent damage to the protected compo-  
nents. An internal charge pump eliminates the need for  
external capacitors and drives the MOSFET GATEN for  
a simple, robust solution.  
♦ Overvoltage Protection Up to +28V  
♦ Reverse Polarity Protection Down to -28V  
♦ Preset Overvoltage (OV) Trip Level (7.4V, 6.35V,  
5.8V, 4.65V)  
♦ Drive Low-Cost Complementary MOSFET  
♦ Internal 50ms Startup Delay  
♦ Internal Charge Pump  
♦ 8.5µA Standby Current (In UVLO Mode)  
♦ 0.4µA Shutdown Current  
♦ Overvoltage Fault FLAG Indicator  
♦ 6-Pin (2mm x 2mm) µDFN and 6-Pin SOT23  
The overvoltage thresholds are preset to +7.4V  
(MAX4864L), +6.35V (MAX4865L), +5.8V (MAX4866L),  
and +4.65V (MAX4867). When the input voltage drops  
below the undervoltage lockout (UVLO) threshold, the  
devices enter a low-current standby mode (8.5µA). Also in  
shutdown (EN set to logic-high), the current is reduced fur-  
ther (0.4µA). The MAX4864L/MAX4865L/MAX4866L have  
a +2.85V UVLO threshold, and the MAX4867 has a +2.5V  
UVLO threshold. The MAX4865/MAX4866 have a 4.15V  
UVLO threshold.  
Packages  
Ordering Information  
PIN-  
PACKAGE  
OV TRIP  
TOP PKG  
LEVEL (V) MARK CODE  
PART  
MAX4864LEUT-T 6 SOT23-6  
MAX4864LELT 6 µꢀFN  
MAX4865LEUT-T 6 SOT23-6  
MAX4865LELT 6 µꢀFN  
MAX4866LEUT-T 6 SOT23-6  
7.40  
7.40  
6.35  
6.35  
5.80  
5.80  
4.65  
4.65  
ABVO  
AAE L622-1  
ABVP  
AAF L622-1  
ABVQ  
AAG L622-1  
ABVN  
AAꢀ L622-1  
—
In addition, a 15kV ESꢀ protection is provided to the  
input when bypassed with a 1µF capacitor to ground. All  
devices are offered in a small 6-pin SOT23 and a 6-pin,  
2mm x 2mm µꢀFN package, and are specified for  
operation over the -40°C to +85°C temperature range.  
—
—
MAX4866LELT  
MAX4867EUT-T  
MAX4867ELT  
6 µꢀFN  
6 SOT23-6  
6 µꢀFN  
—
Applications  
Cell Phones  
ꢀigital Still Cameras  
PꢀAs and Palmtop ꢀevices  
MP3 Players  
Note: All devices are specified over the -40°C to +85°C operating  
range.  
Typical Operating Circuit  
Pin Configurations  
ADAPTER  
(-28V TO +28V)  
TOP VIEW  
P
N
OUTPUT  
1 F  
IN  
GND  
1
2
3
6
5
4
EN  
GND  
FLAG  
IN  
1
2
3
6
5
4
GATEN  
GATEP  
EN  
GATEP  
IN  
GATEN  
MAX4864L  
MAX4865L  
MAX4866L  
MAX4867  
MAX4864L  
MAX4865L  
MAX4866L  
MAX4867  
GATEP  
GATEN  
MAX4864L  
MAX4865L  
MAX4866L  
MAX4867  
V
IO  
FLAG  
EN  
SOT23  
DFN  
GND  
FLAG  
Functional Diagram appears at end of data sheet.  
________________________________________________________________ Maxim Integrated Products  
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at  
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.  
1234567...12

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