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MAX4826

更新时间： 2024-09-13 05:00:15
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50mA/100mA Current-Limit Switches with NO-LOAD Flag in レDFN

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MAX4826 数据手册

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19-3672; Rev 0; 5/05  
50mA/100mA Current-Limit Switches with  
NO-LOAD Flag in µDFN  
General Description  
Features  
♦ Guaranteed Current Limit: 50mA, 100mA  
♦ Thermal Shutdown Protection  
♦ Reverse-Current Protection  
♦ 0.7Ω On-Resistance (MAX4826–MAX4831)  
♦ 14ms Guaranteed Blanking Time  
♦ Fault Flag (FFLG)  
The MAX4826–MAX4831 family of switches has internal  
current limiting to prevent host devices from being  
damaged due to faulty load conditions. These analog  
switches have a low 0.7Ω on-resistance and operate  
from a +2.3V to +5.5V input voltage range. These  
devices are available with guaranteed 50mA and  
100mA current limits, making them ideal for load-  
switching applications. In addition to the current-limit  
fault flag (FFLG), an open-drain no-load flag indicator  
(NOLD) notifies the system when the current through  
the switch is less than 10mA (MAX4826–MAX4829), or  
5mA (MAX4830/MAX4831).  
♦ No-Load Flag (NOLD)  
♦ 65µA Supply Current  
When the switch is on and a load is connected to the  
port, a guaranteed blanking time of 14ms ensures that  
the transient voltages settle down. If, after this blanking  
time, the load current is greater than the current limit,  
the MAX4826/MAX4828/MAX4830 enter a latch-off state  
where the switch is turned off, and FFLG is issued to  
the microprocessor. The switch can be turned on again  
by cycling the power or ON.  
♦ 8µA Latch-Off Current  
♦ 0.01µA Shutdown Current  
♦ +2.3V to +5.5V Supply Range  
♦ Undervoltage Lockout  
♦ Fast Current-Limit Response Time  
♦ 6-Pin µDFN Package (1mm x 1.5mm)  
The MAX4827/MAX4829/MAX4831 have an autoretry  
feature where the switch turns off after the blanking  
time, and then continuously checks to see if the over-  
load condition is present. The current-limit fault flag  
(FFLG) is issued and remains low until after the fault  
condition is removed. The switch remains on after the  
overload condition disappears.  
Applications  
GPS Systems  
Cell Phones  
Digital Still Cameras  
The MAX4826–MAX4831 operate over the extended  
-40°C to +85°C temperature range, and are available in a  
tiny space-saving, 1mm x 1.5mm, 6-pin µDFN package.  
PDAs and Palmtop Devices  
MP3 Players  
Ordering Information/Selector Guide  
MIN FULL-  
PIN-  
PACKAGE  
MAX NO-  
LOAD LIMIT  
(mA)  
ON-RESISTANCE  
TOP  
MARK  
PKG  
CODE  
PART  
LOAD LIMIT  
(mA)  
(Ω)  
MODE  
T
= +25°C  
A
MAX4826ELT  
MAX4827ELT*  
MAX4828ELT*  
MAX4829ELT  
MAX4830ELT  
MAX4831ELT*  
6 µDFN  
6 µDFN  
6 µDFN  
6 µDFN  
6 µDFN  
6 µDFN  
50  
50  
10  
10  
10  
10  
5
1
1
1
1
2
2
Latch Off  
Autoretry  
Latch Off  
Autoretry  
Latch Off  
Autoretry  
AK  
AL  
L611-1  
L611-1  
L611-1  
L611-1  
L611-1  
L611-1  
100  
100  
50  
AM  
AN  
AO  
AP  
50  
5
Note: All devices operate over the -40°C to +85°C operating range.  
*Future product—contact factory for availability.  
Pin Configuration 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...10

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