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參數(shù)資料
| 型號： | LM3743 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | N-Channel FET Synchronous Buck Controller for Low Output Voltages |
| 中文描述： | N溝道FET的同步降壓控制器，用于低輸出電壓 |
| 文件頁數(shù)： | 4/23頁 |
| 文件大?。?/td> | 1145K |
| 代理商： | LM3743 |
Electrical Characteristics
V
CC
= 3.3V, COMP/EN floating unless otherwise indicated in the conditions
column. Limits in standard type are for T
J
= 25C only; limits in boldface type apply over the junction temperature (T
J
) range of
-40C to +125C. Minimum and Maximum limits are guaranteed through test, design, or statistical correlation. Typical values
represent the most likely parametric norm at T
J
= 25C, and are provided for reference purposes only. (Continued)
Symbol
V
RAMP
LOGIC INPUTS AND OUTPUTS
V
COMP/EN-HI
COMP/EN pin logic high trip-point
V
COMP/EN-LO
COMP/EN pin logic low trip-point
HICCUP MODE
N
LSCYCLES
Low-side sensing cycles before hiccup
mode
N
LSRESET
Low-side sensing cycles reset without
activating current limit
V
UVP
Under Voltage Protection comparator
threshold
t
GLICH-UVP
Under Voltage Protection fault time before
hiccup mode
t
HICCUP
Hiccup timeout
t
SS
Soft-start time coming out of hiccup mode
THERMAL RESISTANCE
θ
JA
Junction to Ambient Thermal Resistance
Parameter
Conditions
Min
Typ
1.0
Max
Units
V
PWM Ramp Amplitude
0.65
0.45
0.9
V
V
0.1
15
Cycles
32
Cycles
400
mV
7
μs
5.5
3.6
ms
ms
235
C/W
Note 1:
Absolute maximum ratings indicate limits beyond which damage to the device may occur.
Operating ratings
indicate conditions for which the device
operates correctly.
Operating Ratings
do not imply guaranteed performance limits.
Note 2:
Practical lower limit of V
CC
depends on selection of the external MOSFET. See the MOSFET GATE DRIVERS section under Application Information for
further details.
Note 3:
ESD using the human body model which is a 100 pF capacitor discharged through a 1.5 k
resistor into each pin. Test method is per JESD22–A114.
L
www.national.com
4
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM3743-1000EVAL | 功能描述:電源管理IC開發(fā)工具 LM3743 EVAL BOARD 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 |
| LM3743-300EVAL | 功能描述:電源管理IC開發(fā)工具 LM3743 EVAL BOARD 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 |
| LM3743MM-1000 | 功能描述:電壓模式 PWM 控制器 RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| LM3743MM-1000/NOPB | 功能描述:電壓模式 PWM 控制器 RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| LM3743MM-300 | 功能描述:電壓模式 PWM 控制器 RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓?fù)浣Y(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
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