MAX4919B 데이터 시트보기 (PDF) - Maxim Integrated
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MAX4919B Datasheet PDF : 19 Pages
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Battery Power-Up Logic with Overvoltage
and Overcurrent Protection
Typical Operating Characteristics (continued)
(VBTI = 4V, TA = +25°C, unless otherwise noted.)
CURRENT LIMIT
vs. TEMPERATURE
4.0
3.8
3.6
3.4
3.2
3.0
2.8
2.6
2.4
2.2
2.0
-40 -15
10
35
60
85
TEMPERATURE (°C)
NORMALIZED UVLO THRESHOLD
vs. TEMPERATURE
1.020
1.015
1.010
1.005
1.000
0.995
0.990
0.985
0.980
-40 -15
10
35
60
85
TEMPERATURE (°C)
NORMALIZED OVLO THRESHOLD
vs. TEMPERATURE
1.020
1.015
1.010
1.005
1.000
0.995
0.990
0.985
0.980
-40 -15
10
35
60
85
TEMPERATURE (°C)
ADAPTER POWER-UP RESPONSE
MAX4919/20/21B toc07
MAX4919B VADAPTER
(5V/div)
VIN
(5V/div)
VGN1
(5V/div)
10ms/div
VACOK
(5V/div)
VOUT
(5V/div)
ADAPTER POWER-UP RESPONSE
MAX4919/20/21B toc08
MAX4919B VADAPTER
(5V/div)
PWR_ON, HP_PWR, PWR_HOLD = 0V
VIN
(5V/div)
VGN1
(5V/div)
VACOK
(5V/div)
200ms/div
VBTO
(5V/div)
OVERVOLTAGE RESPONSE
MAX4919/20/21B toc09
MAX4919B
7V VADAPTER
(2V/div)
5V
7V VIN
(2V/div)
5V
VGN1
(5V/div)
2µs/div
VACOK
(5V/div)
_______________________________________________________________________________________ 5
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