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MAX639 डेटा पत्रक PDF( Datasheet डाउनलोड )


डेटा पत्रक - 5V/3.3V/3V/Adjustable / High-Efficiency / Low IQ / Step-Down DC-DC Converters - Maxim

भाग संख्या MAX639
समारोह 5V/3.3V/3V/Adjustable / High-Efficiency / Low IQ / Step-Down DC-DC Converters
मैन्युफैक्चरर्स Maxim 
लोगो Maxim लोगो 
पूर्व दर्शन
1 Page
		
<?=MAX639?> डेटा पत्रक पीडीएफ

MAX639 pdf
5V/3.3V/3V/Adjustable, High-Efficiency,
Low IQ, Step-Down DC-DC Converters
ABSOLUTE MAXIMUM RATINGS
V+ ...........................................................................................12V
LX .........................................................(V+ - 12V) to (V+ + 0.3V)
LBI, LBO, VFB, SHDN, VOUT........................-0.3V to (V+ + 0.3V)
LX Output Current (Note 1) ......................................................1A
LBO Output Current ............................................................10mA
Continuous Power Dissipation (TA = +70°C)
Plastic DIP (derate 9.09mW/°C above +70°C) .............727mW
SO (derate 5.88mW/°C above +70°C) ..........................471mW
CERDIP (derate 8.00mW/°C above +70°C) ..................640mW
Operating Temperature Ranges:
MAX639C_ _ .......................................................0°C to +70°C
MAX639E_ _ ....................................................-40°C to +85°C
MAX639MJA ..................................................-55°C to +125°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10s) .................................+300°C
Note 1: Peak inductor current must be limited to 600mA by using an inductor of 100µH or greater.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V+ = 9V for the MAX639, V+ = 5V for the MAX640/MAX653, ILOAD = 0mA, TA = TMIN to TMAX, typical values are at TA = +25°C,
unless otherwise noted.)
PARAMETER
Supply Voltage
Supply Current
Output Voltage (Note 2)
Dropout Voltage
Efficiency
Switch On-Time
Switch Off-Time
CONDITIONS
MIN TYP MAX UNITS
4.0 11.5 V
SHDN = V+, no load
10 20 µA
MAX639, V+ = 6.0V to 11.5V, 0mA < IOUT < 100mA
4.80 5.00 5.20
MAX640, V+ = 4.0V to 11.5V, 0mA < IOUT < 100mA
3.17 3.30 3.43
V
MAX653, V+ = 4.0V to 11.5V, 0mA < IOUT < 100mA
2.88 3.00 3.12
IOUT = 100mA, L = 100µH
0.5 V
MAX639
IOUT = 100mA, L = 100µH
IOUT = 25mA, L = 470µH
91
94
MAX640
IOUT = 100mA, L = 100µH
IOUT = 25mA, L = 470µH
87
91
%
MAX653
IOUT = 100mA, L = 100µH
IOUT = 25mA, L = 470µH
85
89
MAX639
V+ = 9V, VOUT = 5V
V+ = 6V, VOUT = 3V
10.6 12.5 14.4
14.2 16.7 19.2
MAX640
V+ = 9V, VOUT = 3.3V
V+ = 4V, VOUT = 3.3V
7.5 8.8 10.1
60.7 71.4 82.1
µs
MAX653
V+ = 9V, VOUT = 3V
V+ = 4V, VOUT = 3V
7.1 8.3 9.5
42.5 50.0 57.5
MAX639
V+ = 9V, VOUT = 5V
V+ = 6V, VOUT = 3V
9.0 11.7 13.5
16.6 19.5 22.4
MAX640
V+ = 9V, VOUT = 3.3V
V+ = 4V, VOUT = 3.3V
13.3 15.6 17.9
13.3 15.6 17.9
µs
MAX653
V+ = 9V, VOUT = 3V
V+ = 4V, VOUT = 3V
14.6 17.2 19.8
14.6 17.2 19.8
2 _______________________________________________________________________________________

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डाउनलोड[ MAX639 Datasheet.PDF ]


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