參數(shù)資料
型號： MAX744A
廠商： Maxim Integrated Products, Inc.
元件分類： DC/DC變換器
英文描述： 5V, Step-Down, Current-Mode PWM DC-DC Converters
中文描述： 5V、降壓型、電流模式PWM DC-DC轉(zhuǎn)換器
文件頁數(shù)： 3/16頁
文件大小： 229K
代理商： MAX744A
M
5V, S tep-Down,
Current-Mode PWM DC-DC Converters
_______________________________________________________________________________________
3
Note 1:
The standby current typically settles to 25μA (over temperature) within 2 seconds; however, to decrease test time, the part
is guaranteed at a 100μA maximum value.
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 3, V+ = 9V for the MAX730A, V+ = 12V for the MAX738A/MAX744A, I
LOAD
= 0mA, T
A
= T
MIN
to T
MAX
,
unless otherwise noted.)
PARAMETER
I
LOAD
= 0mA to 300mA
I
LOAD
= 0mA to 750mA
V+ = 9.0V, I
LOAD
= 300mA
V+ = 12V, I
LOAD
= 750mA
MAX730A
MIN
TYP
0.0005
MAX
Supply Current
(includes switch
current)
UNITS
MAX738A
MIN
TYP
MAX
4.3
4.5
mA
MAX744AE
MAX744AM
I
LX
= 500mA
V+ = 12V, LX = 0V
V+ = 12V, T
A
= +25°C
6.0
100.0
6.0
100.0
6.0
100.0
μA
Standby Current
V
IH
V
IL
0.0005
90
LX On Resistance
LX Leakage Current
Reference Voltage
2.0
2.0
2.0
MAX744AC/AE
MAX744AM
0.5
1.0
1.23
MAX744A
MIN
TYP
MAX
0.25
0.25
0.25
V
0.5
1.0
1.23
0.0005
90
Shutdown Input
Threshold
%/mA
Shutdown Input
Leakage Current
Short-Circuit Current
Load Regulation
SHDN
= 0V (Note 1)
0.5
1.0
1.23
50
170
1.7
3.0
1.7
1.2
3.0
2.5
3.0
3.0
3.5
4.0
1.7
3.0
159.0 185.0 212.5
159.0
μA
V
MAX744AC/AE
MAX744AM
MAX744AC/AE
MAX744AM
MAX744AC
1.0
1.0
V+ = 6.0V
to 9.0V
1.0
μA
Reference Drift
1.5
5.7
V+ = 9.0V
to 12.0V
50
160
50
1.5
5.7
87
1.5
4.7
CONDITIONS
A
V+ rising
V+ falling
216.5
6.0
6.0
5.7
5.2
5.0
V
kHz
Undervoltage
Lockout
87
%
Efficiency
92
V+ = 6.0V
to 16.0V
1.15
1.30
1.15
1.30
1.15
1.30
130
190
130
210
ppm/°C
Oscillator Frequency
7500
7500
7500
Compensation Pin
Impedance
V+ = 12.0V
to 16.0V
相關(guān)PDF資料
PDF描述
MAX738AEWE LJT 37C 37#22D SKT PLUG
MAX744AEWE Circular Connector; No. of Contacts:26; Series:MS27467; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:17; Circular Contact Gender:Pin; Circular Shell Style:Straight Plug; Insert Arrangement:17-26 RoHS Compliant: No
MAX738ACWE Replaced by SN54197 : 50/30/100-Mhz Presettable Decade OR Binary Counters/Latches 14-CFP -55 to 125
MAX738AEPA Dual 4-Input Positive-NAND Gates 20-LCCC -55 to 125
MAX738AMJA Dual 4-Input Positive-NAND Gates 14-CDIP -55 to 125
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX744AC/D 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 5V Step-Down Current-Mode PWM 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
MAX744ACPA 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
MAX744ACPA+ 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 5V Step-Down 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
MAX744ACWE 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 5V Step-Down 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
MAX744ACWE+ 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 5V Step-Down 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
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