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MAX878 डेटा पत्रक PDF( Datasheet डाउनलोड )


डेटा पत्रक - Step-Up/Step-Down DC-DC Converters - Maxim

भाग संख्या MAX878
समारोह Step-Up/Step-Down DC-DC Converters
मैन्युफैक्चरर्स Maxim 
लोगो Maxim लोगो 
पूर्व दर्शन
1 Page
		
<?=MAX878?> डेटा पत्रक पीडीएफ

MAX878 pdf
5V/3.3V/3V/Adjustable-Output,
Step-Up/Step-Down DC-DC Converters
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (IN to PGND) .......................................0V to +7V
Output Short-Circuit Duration to PGND, AGND (Note 1)....30sec
Voltage Applied to:
LX (switch off).......................................................-0.3V to +7V
OU(Ts,wS–—iHt—cDh—No.n..).......................................................................3..0..s..e..c...s..h..o..r.t..t-o0.I3NVotroO+U7VT
FB ..........................................................-0.3V to (OUT + 0.3V)
AGND to PGND ........................................................-0.3V, +0.3V
Reverse Battery Current....................................................900mA
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:
MAX87_C_A ........................................................0°C to +70°C
MAX87_E_A .....................................................-40°C to +85°C
MAX87_MJA ..................................................-55°C to +125°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................+300°C
Note 1: The output may be shorted to ground continuously if the package power dissipation is not exceeded.
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 IN = 2.7V, I LOAD = 0mA, LX = 22 µH, C OUT = 100µF, –S—H—D—N and ILIM connected to IN, AGND connected to PGND,
TA = TMIN to TMAX, typical values are at TA = +25°C, unless otherwise noted.)
PARAMETER
CONDITIONS
ILOAD = 0mA, TA = +25°C
Minimum Start-Up Voltage
(Notes 2, 6)
MAX877/MAX879 (VOUT = 5V), 0mA < ILOAD < 180mA,
TA = +25°C
MAX878/MAX879 (VOUT = 3.3V), 0mA < ILOAD < 120mA,
TA = +25°C
Maximum Operating Voltage
(Notes 2, 3)
Output Voltage
(MAX879 set to 5V)
(Note 3)
MAX877C/MAX879C: 0mA ILOAD 240mA,
2.7V VIN 6.2V;
MAX877E/MAX879E: 0mA ILOAD 220mA,
2.7V VIN 6.2V;
MAX877M/MAX879M: 0mA ILOAD 180mA,
2.7V VIN 6.2V
MAX878C/MAX879C: 0mA ILOAD 210mA,
1.8V VIN 6.2V;
Output Voltage
(MAX879 set to
3.3V)
(Note 3)
SEL = 0V
MAX878E/MAX879E: 0mA ILOAD 200mA,
1.8V VIN 6.2V;
MAX878M/MAX879M: 0mA ILOAD 180mA,
1.8V VIN 6.2V
MAX878C: 0mA ILOAD 210mA, 1.8V VIN 6.2V;
SEL = Open MAX878E: 0mA ILOAD 200mA, 1.8V VIN 6.2V;
MAX878M: 0mA ILOAD 180mA, 1.8V VIN 6.2V
Output Voltage Range
Efficiency
No-Load Supply Current
Shutdown Supply Current
–S—H—D—N– Bias Current
MAX879, ILOAD = 0mA (Note 4)
MAX877/MAX879 (VOUT = 5V), ILOAD = 100mA, VIN = 4V
MAX878/MAX879 (VOUT = 3.3V), ILOAD = 100mA, VIN = 2.5V
ILOAD = 0mA (switch off)
–S—H—D—N– = 0V
0V < –S—H—D—N–< VIN
VIN < –S—H—D—N– < 5V
MAX87_C, MAX87_E
MAX87_M
MIN
6.2
4.80
3.17
2.88
2.5
TYP
1
5.00
3.30
3.00
85
82
195
20
20
15
12
MAX UNITS
2.5 V
1.5
V
5.20
V
3.43
V
3.12
6.0 V
%
310 µA
30
µA
35
100 nA
40 µA
2 _______________________________________________________________________________________
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डाउनलोड[ MAX878 Datasheet.PDF ]


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