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參數(shù)資料
| 型號： | MAX879 |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類： | DC/DC變換器 |
| 英文描述： | Adjustable-Output, DC-DC Converters(3.3V/3V輸出,1.8V~6V輸入,步升/步降DC-DC變換器) |
| 中文描述： | 可調(diào)輸出，DC - DC轉(zhuǎn)換（3.3V/3V輸出，電壓為1.8V?6V的輸入，步升/步降型DC - DC變換器） |
| 文件頁數(shù)： | 2/12頁 |
| 文件大?。?/td> | 152K |
| 代理商： | MAX879 |
M
5V /3.3V /3V /Adjustable-Output,
S tep-Up/S tep-Down DC-DC Converters
2
_______________________________________________________________________________________
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
O(switch on)...................................30sec short to IN or OUT
FB ..........................................................-0.3V to (OUT + 0.3V)
AGND to PGND........................................................-0.3V, +0.3V
Reverse Battery Current....................................................900mA
Continuous Power Dissipation (T
A
= +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_MJ A ..................................................-55°C to +125°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................+300°C
ELECTRICAL CHARACTERISTICS
(V
IN
= 2.7V, I
LOAD
= 0mA, LX = 22μH, C
OUT
= 100μF, –—H—D—N and ILIM connected to IN, AGND connected to PGND,
T
A
= T
MIN
to T
MAX
, typical values are at T
A
= +25°C, unless otherwise noted.)
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.
PARAMETER
SEL = 0V
CONDITIONS
MIN
TYP
1
MAX
Output Voltage
(MAX879 set to
3.3V)
(Note 3)
V
UNITS
MAX878/MAX879 (V
OUT
= 3.3V), I
LOAD
= 100mA, V
IN
= 2.5V
I
LOAD
= 0mA (switch off)
MAX877/MAX879 (V
OUT
= 5V), I
LOAD
= 100mA, V
IN
= 4V
MAX879, I
LOAD
= 0mA (Note 4)
SEL = Open
0V <–———N< V
IN
V
IN
< –———N< 5V
–———N= 0V
20
15
35
100
μA
Efficiency
MAX87_C, MAX87_E
MAX87_M
Output Voltage Range
–———NBias Current
Maximum Operating Voltage
(Notes 2, 3)
MAX877C/MAX879C: 0mA
≤
I
LOAD
≤
240mA,
2.7V
≤
V
IN
≤
6.2V;
MAX877E/MAX879E: 0mA
≤
I
LOAD
≤
220mA,
2.7V
≤
V
IN
≤
6.2V;
MAX877M/MAX879M: 0mA
≤
I
LOAD
≤
180mA,
2.7V
≤
V
IN
≤
6.2V
MAX878C/MAX879C: 0mA
≤
I
LOAD
≤
210mA,
1.8V
≤
V
IN
≤
6.2V;
MAX878E/MAX879E: 0mA
≤
I
LOAD
≤
200mA,
1.8V
≤
V
IN
≤
6.2V;
MAX878M/MAX879M: 0mA
≤
I
LOAD
≤
180mA,
1.8V
≤
V
IN
≤
6.2V
6.2
V
Shutdown Supply Current
nA
Output Voltage
(MAX879 set to 5V)
(Note 3)
4.80
5.00
5.20
V
3.17
3.30
3.43
12
40
μA
I
LOAD
= 0mA, T
A
= +25°C
MAX877/MAX879 (V
OUT
= 5V), 0mA < I
LOAD
< 180mA,
T
A
= +25°C
MAX878/MAX879 (V
OUT
= 3.3V), 0mA < I
LOAD
< 120mA,
T
A
= +25°C
2.88
3.00
3.12
2.5
2.5
6.0
V
Minimum Start-Up Voltage
(Notes 2, 6)
85
82
195
20
1.5
V
MAX878C: 0mA
≤
I
LOAD
≤
210mA, 1.8V
≤
V
IN
≤
6.2V;
MAX878E: 0mA
≤
I
LOAD
≤
200mA, 1.8V
≤
V
IN
≤
6.2V;
MAX878M: 0mA
≤
I
LOAD
≤
180mA, 1.8V
≤
V
IN
≤
6.2V
%
No-Load Supply Current
310
30
μA
Note 1:
The output may be shorted to ground continuously if the package power dissipation is not exceeded.
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