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NCP3488 Datasheet(HTML) 2 Page - ON Semiconductor

Part No. NCP3488
Description  MOSFET Driver with Dual Outputs for Synchronous Buck Converters
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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NCP3488 Datasheet(HTML) 2 Page - ON Semiconductor

   
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NCP3488
http://onsemi.com
2
Figure 1. Block Diagram
8
1
4
7
5
6
2
3
VCC
DRVH
BST
SWN
DRVL
PGND
OD
IN
TSD
UVLO
VCC
MONITOR
FALLING
EDGE
DELAY
MONITOR
FALLING
EDGE
DELAY
NON−OVERLAP
TIMERS
MIN DRVL
OFF TIMER
START
STOP
PIN DESCRIPTION
Pin No.
Symbol
Description
1
BST
Upper MOSFET Floating Bootstrap Supply. A capacitor connected between BST and SW pins holds this
bootstrap voltage for the high−side MOSFET as it is switched. The recommended capacitor value is between
100 nF and 1.0 mF. An external diode is required with the NCP3488.
2
IN
Logic−Level Input. This pin has primary control of the drive outputs.
3
OD
Output Disable. When low, normal operation is disabled forcing DRVH and DRVL low.
4
VCC
Input Supply. A 1.0 mF ceramic capacitor should be connected from this pin to PGND.
5
DRVL
Output drive for the lower MOSFET.
6
PGND
Power Ground. Should be closely connected to the source of the lower MOSFET.
7
SWN
Switch Node. Connect to the source of the upper MOSFET.
8
DRVH
Output drive for the upper MOSFET.


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