MAX879 Ver la hoja de datos (PDF) - Maxim Integrated
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MAX879 Datasheet PDF : 12 Pages
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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
(VIN = 2.7V, ILOAD = 0mA, LX = 22µH, COUT = 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
MIN
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)
6.2
MAX877C/MAX879C: 0mA ≤ ILOAD ≤ 240mA,
2.7V ≤ VIN ≤ 6.2V;
Output Voltage
(MAX879 set to 5V)
(Note 3)
MAX877E/MAX879E: 0mA ≤ ILOAD ≤ 220mA,
2.7V ≤ VIN ≤ 6.2V;
4.80
MAX877M/MAX879M: 0mA ≤ ILOAD ≤ 180mA,
2.7V ≤ VIN ≤ 6.2V
MAX878C/MAX879C: 0mA ≤ ILOAD ≤ 210mA,
1.8V ≤ VIN ≤ 6.2V;
Output Voltage
SEL = 0V
MAX878E/MAX879E: 0mA ≤ ILOAD ≤ 200mA,
1.8V ≤ VIN ≤ 6.2V;
3.17
(MAX879 set to
3.3V)
(Note 3)
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;
2.88
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)
2.5
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
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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