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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)： | 4/12頁 |
| 文件大小： | 152K |
| 代理商： | MAX879 |
M
5V /3.3V /3V /Adjustable-Output,
S tep-Up/S tep-Down DC-DC Converters
4
_______________________________________________________________________________________
__________________________________________Typic al Operating Charac teristic s
(Circuit of Figure 4, T
A
= +25°C, unless otherwise noted.)
90
40
0.1
1
LOAD CURRENT (mA)
1000
MAX877/MAX879
EFFICIENCY vs. LOAD CURRENT
50
M
E
60
70
80
10
100
30
V
IN
= 2.5V
V
IN
= 6.2V
V
IN
= 1.8V
V
OUT
= 5V
V
IN
= 5V
V
IN
= 4V
90
40
0.1
1
LOAD CURRENT (mA)
1000
MAX878
EFFICIENCY vs. LOAD CURRENT
50
M
E
60
70
80
10
100
30
V
IN
= 2.5V
V
IN
= 3.3V
V
IN
= 1.8V
V
OUT
= 3.3V OR 3.0V
V
= 5V
VIN = 6.2V
350
100
0
1
MAX877/MAX879 MAXIMUM OUTPUT
CURRENT AT LOW INPUT VOLTAGE
150
M
INPUT VOLTAGE (V)
O
200
250
300
2
3
0
V
OUT
= 5V
50
350
50
0
3
MAX878 MAXIMUM OUTPUT
CURRENT vs. INPUT VOLTAGE
100
M
INPUT VOLTAGE (V)
O
150
200
250
6
7
0
T
A
= +70°C
300
1
2
4
5
V
OUT
= 3.0V
DIP PACKAGE
DISSIPATION LIMIT
SO PACKAGE
DISSIPATION LIMIT
2.0
1
2
5
SHDN THRESHOLD VOLTAGE
vs. INPUT VOLTAGE AND TEMPERATURE
2.5
M
INPUT VOLTAGE (V)
S
3.0
3.5
3
4
1.5
0.5
1.0
7
6
T
A
= +25°C
T
A
= -55°C
T
A
= +125°C
300
200
1
2
5
NO-LOAD SUPPLY CURRENT
vs. SUPPLY VOLTAGE AND TEMPERATURE
220
M
SUPPLY VOLTAGE (V)
N
240
260
280
3
4
180
160
(SWITCH = OFF)
120
140
100
7
6
T
A
= 0°C
T
A
= -40°C
T
A
= +25°C
T
A
= +85°C
50
1
2
5
SHUTDOWN SUPPLY CURRENT
vs. INPUT VOLTAGE AND TEMPERATURE
60
M
INPUT VOLTAGE (V)
S
μ
A
70
80
3
4
40
10
20
30
0
7
6
T
A
= 0°C
T
A
= -40°C
T
A
= +85°C
A: I
OUT
, 200mA/div, 0mA t 2ms/div
B: V
OUT
, 50mV/div, AC COUPLED
MAX878, V
OUT
= 3.3V, V
IN
= 2.5V
LOAD-TRANSIENT RESPONSE
A
B
A: V
IN
, 2V/div, 2V to 4V
B: V
OUT
, 50mV/div, AC COUPLED
I
OUT
= 240mA
MAX878, V
OUT
= 3.3V, C
INBYPASS
= 47
μ
F
LINE-TRANSIENT RESPONSE
GND
2ms/div
A
B
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