參數(shù)資料
型號(hào): MAX1797
廠商: Maxim Integrated Products, Inc.
元件分類: 數(shù)字信號(hào)處理
英文描述: Replaced by TMS320C6722B : Digital Signal Processor 144-QFP
中文描述: 低電流、升壓型DC-DC轉(zhuǎn)換器,可真正關(guān)斷
文件頁數(shù): 3/13頁
文件大小: 397K
代理商: MAX1797
M
Low Supply Current, Step-Up DC-DC Converters
with True-Shutdown
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(V
BATT
= +2V, OUT = FB (V
OUT
= +3.3V), SHDN = LBI = GND,
T
A
= 0
°
C to +85
°
C
, unless otherwise noted. Typical values are
T
A
= +25
°
C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
2
2
4
1
0.85
0.925
25
9
MAX
4
4
5
1.2
0.90
0.975
UNITS
μ
A
μ
A
μ
s
μ
s
Operating Current into BATT
Shutdown Current into BATT
LX Switch MaxImum On-Time
LX Switch Minimum Off-Time
V
FB
= +1.4V, V
LBI
= +1V
SHDN = BATT, V
LBI
= +1V
V
FB
= +1V, if current limit not reached
V
FB
= +1V
V
BATT
= +2V
V
BATT
= LBI
t
ON
t
OFF
3
0.8
0.8
0.875
LBI Threshold Voltage Falling
V
LBI
V
LBI Hysteresis
LBI Input Current
mV
nA
I
LBI
V
LBI
= +0.8V
V
BATT
= V
LBI
= +0.975V,
sinking 20
μ
A (50
typ)
100
0.1
LBO Low Output Voltage
V
BATT
= V
LBI
= +1.1V,
sinking 100
μ
A (25
typ)
V
LBO
= +5.5V
0.1
V
LBO Off-Leakage Current
1
100
nA
V
IL
0.2
V
BATT
SHDN Input Voltage
V
IH
0.8
V
BATT
V
Shutdown Input Current
V
SHDN
= 0 and +5.5V
100
nA
ELECTRICAL CHARACTERISTICS
(V
BATT
= +2V, OUT = FB (V
OUT
= +3.3V), SHDN = LBI = GND,
T
A
= -40
°
C to +85
°
C
, unless otherwise noted.) (Note 3)
PARAMETER
SYMBOL
V
BATT
CONDITIONS
MIN
1.0
3.13
4.75
MAX
5.5
3.47
5.25
UNITS
V
Operating Voltage
Note 1
FB = OUT
FB = GND
Output Voltage
V
OUT
V
Adjustable Output Voltage
Range
2.0
5.5
V
MAX1795
MAX1796
MAX1797
MAX1795
MAX1796
MAX1797
100
200
400
60
125
250
FB = OUT
(V
OUT
= +3.3V)
Steady-State Output Current
(Note 1)
I
OUT
FB = GND
(V
OUT
= +5.0V)
mA
Feedback Set-Point Voltage
(Adjustable Mode)
V
FB
V
OUT
= +2V to +5.5V
1.19
1.29
V
Feedback Input Current
I
FB
V
FB
= +1.25V
100
nA
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