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參數(shù)資料
| 型號： | LM3478 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | High Efficiency Low-Side N-Channel Controller for Switching Regulator |
| 中文描述： | 高效率低側(cè)N溝道開關(guān)穩(wěn)壓器控制器 |
| 文件頁數(shù)： | 5/21頁 |
| 文件大?。?/td> | 624K |
| 代理商： | LM3478 |
Electrical Characteristics
(Continued)
Note 1:
Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which operation of the device
is intended to be functional. For guaranteed specifications and test conditions, see the Electrical Characteristics.
Note 2:
The human body model is a 100 pF capacitor discharged through a 1.5k
resistor into each pin.
Note 3:
All limits are guaranteed at room temperature (standard type face) and at
temperature extremes (bold type face)
. All room temperature limits are 100%
tested. All limits at
temperature extremes
are guaranteed via correlation using standard Statistical Quality Control (SQC) methods. All limits are used to calculate
Average Outgoing Quality Level (AOQL).
Note 4:
Typical numbers are at 25C and represent the most likely norm.
Note 5:
The FA/SD pin should be pulled to V
IN
through a resistor to turn the regulator off. The voltage on the FA/SD pin must be above the maximum limit for Output
= High to keep the regulator off and must be below the limit for Output = Low to keep the regulator on.
Note 6:
The voltage on the drive pin, V
DR
is equal to the input voltage when input voltage is less than 7.2V. V
DR
is equal to 7.2V when the input voltage is greater
than or equal to 7.2V.
Note 7:
The limits for the maximum duty cycle can not be specified since the part does not permit less than 100% maximum duty cycle operation.
Note 8:
The over-voltage protection is specified with respect to the feedback voltage. This is because the over-voltage protection tracks the feedback voltage. The
overvoltage protection threshold is given by adding the feedback voltage, V
FB
to the over-voltage protection specification.
Note 9:
For this test, the FA/SD pin is pulled to ground using a 40K resistor.
Note 10:
For this test, the FA/SD pin is pulled to 5V using a 40K resistor.
Typical Performance Characteristics
Unless otherwise specified, V
IN
= 12V, T
J
= 25C.
I
Q
vs Input Voltage (Shutdown)
I
Supply
vs Input Voltage (Non-Switching)
10135503
10135534
I
Supply
vs V
IN
(Switching)
Switching Frequency vs R
FA
10135535
10135504
L
www.national.com
5
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM3478_09 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:High Efficiency Low-Side N-Channel Controller for Switching Regulator |
| LM3478EVAL | 功能描述:BOARD EVALUATION LM3478 RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - DC/DC 與 AC/DC（離線）SMPS 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:True Shutdown™ 主要目的:DC/DC，步升 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:- 電流 - 輸出:1A 輸入電壓:2.5 V ~ 5.5 V 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):升壓 頻率 - 開關(guān):3MHz 板類型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| LM3478EVAL/NOPB | 功能描述:電源管理IC開發(fā)工具 EVAL BOARDFOR LM3478 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 |
| LM3478MA/NOPB | 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| LM3478MAX/NOPB | 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
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