參數(shù)資料
型號： MAX1790
廠商： Maxim Integrated Products, Inc.
元件分類： DC/DC變換器
英文描述： Low-Noise Step-Up DC-DC Converter(低噪聲步升DC-DC轉(zhuǎn)換器)
中文描述： 低噪聲、升壓型DC-DC轉(zhuǎn)換器
文件頁數(shù)： 2/12頁
文件大?。?/td> 405K
代理商： MAX1790
M
Low-Noise Step-Up DC-DC Converter
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
LX to GND ..............................................................-0.3V to +14V
IN,
SHDN
, FREQ, FB to GND...................................-0.3V to +6V
SS, COMP to GND.......................................-0.3V to (V
IN
+ 0.3V)
RMS LX Pin Current ..............................................................1.2A
Continuous Power Dissipation (T
A
= +70°C)
8-Pin μMAX (derate 4.1mW/°C above +70°C)...........330mW
ELECTRICAL CHARACTERISTICS
(V
IN
=
SHDN
= 3V, FREQ = GND,
T
A
= 0°C to +85°C
, unless otherwise noted. Typical values are at T
A
= +25°C.)
SYMBOL
PARAMETER
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.
Operating Temperature Range
MAX1790EUA................................................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
V
SS
= 1.2V
V
FB
= 1.3V, not switching
V
FB
= 1.0V, switching
SHDN
= GND
V
LX
= 12V
V
IN
rising, typical hysteresis is 40mV,
LX remains off below this level
I
LX
= 1.2A
V
FB
= 1V, duty cycle = 65%
FREQ = IN
I = 5μA
FREQ = GND
FREQ = IN
Level to produce V
COMP
= 1.24V,
2.6V < V
IN
< 5.5V
V
FB
= 1.24V
FREQ = GND
Level to produce V
COMP
= 1.24V
CONDITIONS
μA
1.5
4
7
Charge Current
CONTROL INPUTS
100
Reset Switch Resistance
V/A
0.3
0.45
0.65
R
CS
Current-Sense Transresistance
SOFT-START
μA
0.01
20
I
LXOFF
Leakage Current
0.21
0.5
R
ON
On-Resistance
A
1.2
1.6
2.3
I
LIM
Current Limit (Note 1)
84
%
79
85
92
DC
Maximum Duty Cycle
1000
1220
1500
kHz
540
640
740
f
OSC
Frequency
mA
0.18
2
0.1
0.35
5
10
I
IN
Quiescent Current
V
2.25
2.38
2.52
UVLO
V
2.6
5.5
V
IN
Input Supply Range
V
IN
Undervoltage Lockout
V/V
700
A
V
Voltage Gain
OSCILLATOR
μmhos
70
140
240
g
m
Transconductance
%/V
0.05
0.15
Feedback-Voltage Line
Regulation
nA
0
40
I
FB
FB Input Bias Current
μA
I
IN
Shutdown Supply Current
ERROR AMPLIFIER
V
1.222
1.24
1.258
V
FB
Feedback Voltage
UNITS
MIN
TYP
MAX
SHDN
, FREQ
SHDN,
FREQ; V
IN
= 2.6V to 5.5V
SHDN
, FREQ; V
IN
= 2.6V to 5.5V
μA
0.001
1
I
SHDN
SHDN
Input Current
μA
1.8
5
9
I
FREQ
FREQ Pull-Down Current
V
0.1
·
V
IN
Hysteresis
V
0.7
·
V
IN
V
IH
Input High Voltage
V
0.3
·
V
IN
V
IL
Input Low Voltage
N-CHANNEL SWITCH
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相關代理商/技術參數(shù)
參數(shù)描述
MAX1790ESA+ 制造商:Maxim Integrated Products 功能描述:- Rail/Tube
MAX1790EUA 功能描述:直流/直流開關轉(zhuǎn)換器 Integrated Circuits (ICs) RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率: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 安裝風格:SMD/SMT
MAX1790EUA+ 功能描述:直流/直流開關轉(zhuǎn)換器 Low-Noise Step-Up RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率: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 安裝風格:SMD/SMT
MAX1790EUA+T 功能描述:直流/直流開關轉(zhuǎn)換器 Low-Noise Step-Up RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率: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 安裝風格:SMD/SMT
MAX1790EUA+-T 制造商:Maxim Integrated Products 功能描述:CONV DC-DC SGL-OUT STEP UP 8PIN UMAX - Tape and Reel
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