參數(shù)資料
型號： MAX1678
廠商： Maxim Integrated Products, Inc.
元件分類： DC/DC變換器
英文描述： 1-Cell to 2-Cell, Low-Noise, High-Efficiency, Step-Up DC-DC Converter
中文描述： 1節(jié)至2節(jié)電池、低噪聲、高效率、升壓型DC-DC轉(zhuǎn)換器
文件頁數(shù)： 2/12頁
文件大?。?/td> 166K
代理商： MAX1678
M
1-Cell to 2-Cell, Low-Noise,
High-Effic ienc y, S tep-Up DC-DC Converter
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
BATT, OUT,LX,
SHDN
to GND ..............................-0.3V to +6.0V
OUT, LX Current.......................................................................1A
FB, PFI, PFO to GND ................................-0.3V to (V
OUT
+ 0.3V)
Reverse Battery Current (T
A
= +25°C) (Note 1) ...............220mA
Continuous Power Dissipation (T
A
= +70°C)
μMAX (derate 4.1mW/°C above +70°C) .......................330mW
ELECTRICAL CHARACTERISTICS
(V
BATT
= V
SHDN
= 1.3V, I
LOAD
= 0, FB = GND,
T
A
= 0°C to +85°C
, unless otherwise noted. Typical values are at T
A
= +25°C.)
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.
Note 1:
The reverse battery current is measured from the Typical Operating Circuits input terminal to GND when the battery is con-
nected backward. A reverse current of 220mA will not exceed package dissipation limits but, if left for an extended time
(more than 10 minutes), may degrade performance.
Operating Temperature Range ...........................-40°C to +85°C
J unction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +165°C
Lead Temperature (soldering, 10sec) .............................+300°C
V
PFI
= 650mV, V
PFO
= 6V
R
L
= 3k
, T
A
= +25°C
V
PFI
= 0, V
OUT
= 3.3V, I
SINK
= 1mA
V
PFI
= 650mV
Falling PFI hysteresis 2%
V
FB
= 1.3V
I
LOAD
= 20mA, V
BATT
= 2.5V (Figure 7)
V
BATT
= 1V
I
DIODE
= 100mA, P-channel switch off
V
OUT
= 3.5V
V
OUT
= 3.3V
V
OUT
= 3.3V
V
FB
< 0.1V
External feedback
V
OUT
= 3.5V
External feedback
0.9V < V
BATT
< 3.3V (t
ON
= K / V
BATT
)
CONDITIONS
V
0.8 x V
BATT
V
IH
SHDN
Input High Voltage
SHDN
Input Current
V
0.2 x V
BATT
V
IL
SHDN
Input Low Voltage
μA
0.01
1
PFO Leakage Current
V
0.04
0.4
V
OL
PFO Low Output Voltage
nA
0.1
10
PFI Input Current
mV
590
614
632
V
IL,PFI
PFI Trip Voltage
nA
0.1
10
FB Input Current
%
90
η
Efficiency
μA
2
3.5
I
SHDN,BATT
Shutdown Current into BATT
μA
0.1
1
I
SHDN,OUT
Shutdown Current into OUT
μA
4
8
I
Q,BATT
Quiescent Current into BATT
μA
37
65
I
Q,OUT
Quiescent Current into OUT
V-μs
5.60
8
11.2
K
On-Time Constant
V
0.87
Start-Up Voltage (Note 2)
Start-Up Voltage Tempco
Output Voltage (Fixed Mode)
Output Voltage Range
(Adjustable Mode)
FB Set Voltage
V
5.5
V
BATT(MAX)
V
0.7
V
BATT(MIN)
Minimum Operating Input
Voltage
Maximum Operating Input
Voltage
mA
550
I
LX(MAX)
Maximum Peak LX Current
V
0.8
P-Channel Catch Diode Voltage
1.5
2.2
P-Channel On-Resistance
1
1.5
N-Channel On-Resistance
mV/°C
V
-2
3.3
3.16
3.44
V
OUT
V
2.0
5.5
V
1.19
1.23
1.26
V
FB
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
SHDN
= GND or BATT
nA
0.1
10
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX1678ESA 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:
MAX1678EUA 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
MAX1678EUA+ 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 1-2 Cell Step-Up DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
MAX1678EUA+T 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 1-2 Cell Step-Up DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
MAX1678EUAT 制造商:Maxim Integrated Products 功能描述:
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