MAX777L Datasheet, PDF (2/12 Pages) Maxim Integrated Products – Low-Voltage Input, 3V/3.3V/5V/ Adjustable Output, Step-Up DC-DC Converters

Low-Voltage Input, 3V/3.3V/5V/
Adjustable Output, Step-Up DC-DC Converters
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (IN to PGND).......................................0V to 4.5V
Output Short-Circuit Duration to PGND, AGND (Note 1)....30sec
Voltage Applied to:
LX (switch off) .......................................................-0.3V to 4.5V
(switch on) ....................................30sec short to IN or OUT
OUT, SHDN ...........................................................-0.3V to +7V
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:
MAX77_LC_A .......................................................0°C to +70°C
MAX77_LE_A ....................................................-40°C to +85°C
MAX77_LMJA .................................................-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 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
(VIN = +2.5V, ILOAD = 0mA, L = 22µH, COUT = 100µF, SHDN 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
MIN TYP MAX UNITS
Minimum Start-Up Voltage ILOAD < 10mA, TA = +25°C (Note 2)
1
V
Maximum Operating Voltage (Notes 2, 3)
4.5
V
Output Voltage
MAX777L/MAX779L
(set to 5V)
(Note 6)
Output Voltage
MAX778L
(Note 6)
Output Voltage Range
(MAX779L)
MAX777LC/
MAX779LC
MAX777LE/
MAX779LE
MAX777LM/
MAX779LM
MAX778LC
SEL = 0V MAX778LE
MAX778LM
MAX778LC
SEL = OPEN MAX778LE
MAX778LM
(Note 4)
ILOAD ≤ 30mA, 1.1V ≤ VIN ≤ 4.5V or
ILOAD ≤ 140mA, 1.8V ≤ VIN ≤ 4.5V
ILOAD ≤ 30mA, 1.2V ≤ VIN ≤ 4.5V or
ILOAD ≤ 130mA, 1.8V ≤ VIN ≤ 4.5V
ILOAD ≤ 25mA, 1.25V ≤ VIN ≤ 4.5V or
ILOAD ≤ 120mA, 1.8V ≤ VIN ≤ 4.5V
ILOAD ≤ 50mA, 1.1V ≤ VIN ≤ 3.3V or
ILOAD ≤ 210mA, 1.8V ≤ VIN ≤ 3.3V
ILOAD ≤ 50mA, 1.2V ≤ VIN ≤ 3.3V or
ILOAD ≤ 200mA, 1.8V ≤ VIN ≤ 3.3V
ILOAD ≤ 50mA, 1.25V ≤ VIN ≤ 3.3V or
ILOAD ≤ 180mA, 1.8V ≤ VIN ≤ 3.3V
ILOAD ≤ 50mA, 1.1V ≤ VIN ≤ 3V or
ILOAD ≤ 210mA, 1.8V ≤ VIN ≤ 3V
ILOAD ≤ 50mA, 1.2V ≤ VIN ≤ 3V or
ILOAD ≤ 200mA, 1.8V ≤ VIN ≤ 3V
ILOAD ≤ 40mA, 1.25V ≤ VIN ≤ 3V or
ILOAD ≤ 180mA, 1.8V ≤ VIN ≤ 3V
4.80 5.00 5.20 V
3.17 3.30 3.43
V
2.88 3.00 3.12
2.5
6.0 V
Efficiency
ILOAD = 100mA
82
%
No-Load Supply Current ILOAD = 0mA (switch off)
190 310 µA
Shutdown Supply Current SHDN = 0V ^{MAX77_LC, MAX77_LE}
MAX77_LM
20
30
µA
20
35
SHDN Input Current
0V < SHDN < VIN
VIN < SHDN < 5V
15 100 nA
12
40 µA
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