參數(shù)資料
型號： MAX1677
廠商： Maxim Integrated Products, Inc.
元件分類： DC/DC變換器
英文描述： Compact, High-Efficiency, Dual-Output Step-Up and LCD Bias DC-DC Converter
中文描述： 緊湊的、高效率、雙輸出、升壓型和LCD偏置DC-DC轉(zhuǎn)換器
文件頁數(shù)： 3/16頁
文件大小： 201K
代理商： MAX1677
M
Compac t, High-Effic ienc y, Dual-Output
S tep-Up and LCD Bias DC-DC Converter
_______________________________________________________________________________________
3
CONDITIONS
N-channel
P-channel
N-channel PWM mode
N-channel PFM mode
0.22
0.4
670
350
0.5
1.0
800
450
LX Current Limit
I
LX(PWM)
I
LX(PFM)
550
250
mA
UNITS
MIN
TYP
MAX
PARAMETER
P-Channel Synchronous Rectifier
Turn-Off Current in PFM Mode
40
90
140
mA
Internal Oscillator
Oscillator Maximum Duty Cycle
f
CLK/SEL = OUT
240
80
300
85
360
90
kHz
%
D
External Clock Frequency
Range
200
400
kHz
Input Leakage Current
ON Input Threshold
V
ON(LOW)
V
ON(HIGH)
V
IL
V
IH
V
LBI(TH)
LCDON, LCDPOL, CLK/SEL
Input Threshold
V
OUT
> 2.5V
0.2V
OUT
V
0.8V
OUT
599
LBI Falling Threshold
LBI Hysteresis
LBO
Output Low Voltage
LBI Input Bias Current
LBO
Leakage Current
LCD BIAS DC-DC
614
1
629
mV
%
V
nA
μA
V
LBO
(LO)
I
LBI(BIAS)
I
LBO
(LEAK)
Sink current = 1mA
0.1
50
1
V
LBO
= 5.5V
LCDLX Voltage
28
450
V
LCDPOL connected to OUT or GND through
50k
150
225
300
mA
LCDLX Switch Resistance
LCDLX Leakage Current
R
LCDLX
V
OUT
= 3.3V
V
LCDLX
= 28V
Positive LCD, LCDPOL = OUT
Negative LCD, LCDPOL = GND
1.0
1.4
1
1.275
15
50
μA
V
mV
nA
LCDFB Set Point
1.225
-15
1.25
0
LCDFB Input Bias Current
LCD Line Regulation
I
LOAD
= 5mA, V
IN
= 1.2V to 3.6V,
Figure 2
0.1
%/V
LCD Load Regulation
I
LOAD
= 0 to 5mA, V
IN
= 2.4V,
Figure 2
0.5
%
Maximum LCDLX On-Time
t
ON LCD
3.4
0.8
3.0
4.3
1
4.0
0.75
0.5
5.2
1.2
5.0
μs
1.1V < V
OUT
< 5.5V
0.8V
OUT
0.2V
OUT
V
ELECTRICAL CHARACTERISTICS (continued)
(V
OUT
= 3.3V, C
REF
= 0.1μF, POUT = OUT,
T
A
= 0°C to +85°C
, unless otherwise noted. Typical values are at T
A
= +25°C.)
SYMBOL
R
LX(ON)N
R
LX(ON)P
LX On-Resistance
LCDPOL = OUT or GND
300
350
LCDLX Switch Current Limit
ON, LCDON, LCDPOL, CLK/SEL
1
μA
Minimum LCDLX Off-Time
Operating mode
Start-up mode (positive or negative)
LCDPOL = OUT
LCDPOL = GND
μs
LCDFB Voltage for
Start-Up Mode
V
LOGIC AND CONTROL INPUTS
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MAX1677EEE+ 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 Compact Step-Up & LCD Bias DC/DC 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
MAX1677EEE+T 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 Compact Step-Up & LCD Bias DC/DC 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
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MAX1677EVKIT 功能描述:電源管理IC開發(fā)工具 Evaluation Kit for the MAX1677 RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
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