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參數(shù)資料
| 型號： | MP8640DL |
| 廠商： | MONOLITHIC POWER SYSTEMS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, 800 kHz SWITCHING FREQ-MAX, DSO14 |
| 封裝： | 3 X 4 MM, MO-229VGED-3, QFN-14 |
| 文件頁數(shù)： | 3/10頁 |
| 文件大?。?/td> | 351K |
| 代理商： | MP8640DL |
MP8640 – 3A, 23V, 600KHz STEP-DOWN WITH SYNCHRONOUS GATE DRIVER
MP8640 Rev. 1.0
12/13/2007
www.MonolithicPower.com
3
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2007 MPS. All Rights Reserved.
PIN FUNCTIONS
Pin #
Name
Description
Feedback. An external resistor divider from the output to GND, tapped to the FB pin sets
the output voltage. To prevent current limit run away during a short circuit fault condition
the frequency foldback comparator lowers the oscillator frequency when the FB voltage is
below 250mV.
Power Good Indicator. The output of this pin is low if the output voltage is 10% less than
the nominal voltage, otherwise it is an open drain.
EN/SYNC On/Off Control and External Frequency Synchronization Input.
Supply Voltage. The MP8640 operates from a +4.5V to +23V unregulated input. C1 is
needed to prevent large voltage spikes from appearing at the input.
N/C
No Connect.
SW
Switch Output.
Bootstrap. This capacitor is needed to drive the power switch’s gate above the supply
voltage. It is connected between SW and BST pins to form a floating supply across the
power switch driver.
VCC
BG Driver Bias Supply. Decouple with a 1μF ceramic capacitor.
BG
Gate Driver Output. Connect this pin to the synchronous MOSFET Gate.
Ground. This pin is the voltage reference for the regulated output voltage. For this reason
care must be taken in its layout. This node should be placed outside of the D1 to C1
ground path to prevent switching current spikes from inducing voltage noise into the part.
1
FB
2
PG
3
4, 5, 6
IN
7
8, 9, 10
11
BST
12
13
14
GND
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| MP8640DL-LF-P | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 3A 23V 600kHz Step Dwn w/Sync Gate Drvr RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| MP8640DL-LF-Z | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 3A 23V 600kHz Step Dwn w/Sync Gate Drvr RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| MP8642DU-LF-P | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 Dual 3A, 23V 600kHz Step-Down RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| MP8642DU-LF-Z | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 Dual 3A, 23V 600kHz Step-Down RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| MP8666DN-LF | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 6A, 600kHz Step-Down w/Sync Gate Driver RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
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