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參數(shù)資料
| 型號(hào)： | 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(yè)數(shù)： | 3/12頁(yè) |
| 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
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= 2.7V, I
LOAD
= 0mA, LX = 22μH, C
OUT
= 100μF, –—H—D—Nand 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.)
Note 2:
Output in regulation, V
OUT
= V
OUT
(nominal) ±4%.
Note 3:
At high V
IN
to V
OUT
differentials, the maximum load current is limited by the maximum allowable power dissipation in the
package (see Absolute Maximum Ratings and Maximum Output Current graphs in the Typical Operating Characteristics).
Note 4:
Minimum value is production tested. Maximum value is guaranteed by design and is not production tested.
Note 5:
V
OUT
is set to a target value of 5V by 0.1% external feedback resistors. V
OUT
is measured to be within 5V ±2.5%
to guarantee error-comparator trip point.
Note 6:
Startup guaranteed under these load conditions.
PARAMETER
Maximum Switch On Time
CONDITIONS
MIN
TYP
MAX
V
IN
= 1V
MAX877/MAX879
MAX878
I
SW
= 400mA
I
SW
= 600mA
I
SW
= 1000mA
12.6
1.3
2.3
0.21
0.31
0.50
UNITS
I
SW
= 400mA
I
SW
= 600mA
I
SW
= 1000mA
V
IN
= 2.5V
V
IN
= 1.8V
μs
0.275
0.33
0.50
4.0
5.9
Current-Limit Temperature
Coefficient
-0.3
%/°C
Current Limit
1.0
μs
Minimum Switch Off Time
Switch Saturation Voltage
V
μs
Rectifier Forward Voltage Drop
–———NThreshold
V
V
IN
= 1V to 6.2V
V
IN
= 2.7V
VIN/2 +0.25
Error-Comparator Trip Point
(V
REF
)
MAX879, V
IN
= 1.8V to 5V (Note 5)
197.5
202.5
207.5
mV
FB Pin Bias Current
Switch Off Leakage Current
Rectifier Off Leakage Current
1.3
1.7
MAX879
10
0.1
0.1
40
nA
μA
μA
–———NEnable Delay
150
V
A
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