MP2365 데이터 시트보기 (PDF) - Monolithic Power Systems
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MP2365 Datasheet PDF : 11 Pages
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MP2365 – 3A, 28V, 1.4MHz STEP-DOWN CONVERTER
PIN FUNCTIONS
Pin #
1
2
3
4
5
6
Name Description
BS
High-Side Gate Drive Boost Input. BS supplies the drive for the high-side N-Channel MOSFET
switch. Connect a 10nF or greater capacitor from SW to BS to power the high side switch.
Power Input. IN supplies the power to the IC, as well as the step-down converter switches.
IN Drive IN with a 4.75V to 28V power source. Bypass IN to GND with a suitably large capacitor
to eliminate noise on the input to the IC. See Input Capacitor
Power Switching Output. SW is the switching node that supplies power to the output. Connect
SW the output LC filter from SW to the output load. Note that a capacitor is required from SW to BS
to power the high-side switch.
GND Ground. Connect the exposed pad on backside to Pin 4.
Feedback Input. FB senses the output voltage to regulate said voltage. Drive FB with a
FB resistive voltage divider from the output voltage. The feedback threshold is 0.92V. See Setting
the Output Voltage
Compensation Node. COMP is used to compensate the regulation control loop. Connect a
COMP series RC network from COMP to GND to compensate the regulation control loop. In some
cases, an additional capacitor from COMP to GND is required. See Compensation
Enable Input. EN is a digital input that turns the regulator on or off. Drive EN higher than 2.9V
7
EN to turn on the regulator, lower than 0.9V to turn it off. For automatic startup, leave EN
unconnected.
Soft-Start Control Input. SS controls the soft start period. Connect a capacitor from SS to GND
8
SS to set the soft-start period. A 0.1µF capacitor sets the soft-start period to 10ms. To disable the
soft-start feature, leave SS unconnected.
MP2365 Rev. 0.91
www.MonolithicPower.com
3
7/10/2006
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
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