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参数资料
| 型号： | MP2482DN |
| 厂商： | MONOLITHIC POWER SYSTEMS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 9 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | MS-012BA, SOIC-8 |
| 文件页数： | 5/11页 |
| 文件大小： | 350K |
| 代理商： | MP2482DN |
MP2482 – 5A, 30V, 420KHZ STEP-DOWN CONVERTER
MP2482 Rev.1.2
www.MonolithicPower.com
3
10/22/2009
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2009 MPS. All Rights Reserved.
PIN FUNCTIONS
Pin #
Name
Description
1
SW
Switch Output.
2
BST
Bootstrap. This capacitor is needed to drive the power switch’s gate above the supply
voltage. It is connected between SW and BS pins to form a floating supply across the power
switch driver.
3
VCC
Bias Supply. Decouple this pin with a 1F ceramic capacitor.
4
GND
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.
5
FB
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.
6
PG
Power Good Indicator. Connect this pin to VCC or VOUT by a 100k pull-up resistor. The
output of this pin is low if the output voltage is 10% less than the nominal voltage, otherwise
it is an open drain.
7
EN/SYNC On/Off Control Input and Synchronization Pin.
8
IN
Supply Voltage. The MP2482 operates from a +4.5V to +30V unregulated input. C1 is
needed to prevent large voltage spikes from appearing at the input.
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