MP2105 查看數據表（PDF） - Monolithic Power Systems
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MP2105 Datasheet PDF : 8 Pages
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TM
MP2105 – 1MHz 800mA SYNCHRONOUS STEP-DOWN CONVERTER
TYPCIAL PERFORMANCE CHARACTERISTICS (continued)
VIN = 3.3V, VOUT = 1.8V, L1 = 4.7µH, C1 = 4.7µF, C3 = 10µF, TA = +25°C, unless otherwise noted.
Heavy Load Operation
IOUT = 800mA
Startup from Shutdown
VOUT
10mV/div.
IL
0.2A/div.
VEN
2V/div.
VOUT
1V/div.
SW
2V/div.
IL=0
MP2105-TPC07
Short Circuit Protection
(No Load)
VOUT
1V/div.
IL
0.5A/div.
MP2105-TPC08
Short Circuit Recovery
(No Load)
VOUT
1V/div.
IL
0.5A/div.
MP2105-TPC09
IL
0.5A/div.
MP2105-TPC10
PIN FUNCTIONS
Pin # Name Description
EN
GND
SW
IN
FB
1
Regulator Enable Control Input. Drive EN above 1.5V to turn on the MP2105. Drive EN below
0.3V to turn it off (shutdown current < 0.1µA).
2 Ground
3 Power Switch Output. Inductor connection to drains of the internal PFET and NFET switches.
4 Supply Input. Bypass to GND with a 2.2µF or greater ceramic capacitor.
5
Feedback Input. Connect FB to the center point of the external resistor divider. The feedback
threshold voltage is 0.6V.
MP2105 Rev. 1.3
www.MonolithicPower.com
4
5/11/2006
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
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