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NCP5230MNTWG Datasheet(PDF) 2 Page - ON Semiconductor

Part # NCP5230MNTWG
Description  Precise Low Voltage Synchronous Buck
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Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

NCP5230MNTWG Datasheet(HTML) 2 Page - ON Semiconductor

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NCP5230
http://onsemi.com
2
Figure 1. NCP5230 BLOCK DIAGRAM
4
5
3
1
2
16
13
12
8
9
BOOT
UG
LX
VCCP
LG
GND
CSP
CSN/VO
COMP
FB
Control Logic,
Protection,
RAMP
Generator and
PWM Logic
+
+
CDIFF
UVLO
Control
+
+
VREF*75%
VREF*125%
UVP
OVP
OSC
Error Amplifier
Current Sense
Amplifier
+
VREF*50%
OVP,
UNLATCHED
0.8V
11
10
VSEN
FBG
15
7
SYNC
14
ROSC/EN
Programmable
OSC
6
1.24V
2.2 W
Over Current
Detector
PIN DESCRIPTIONS
Pin No.
Symbol
Description
1
VCCP
Power supply for bottom gate MOSFET drivers
2
LG
Bottom gate MOSFET driver pin
3
LX
Switch node
4
BOOT
Supply rail for the floating top gate driver
5
UG
Top gate MOSFET driver pin
6
PGOOD
Power Good. It is an open−drain output, set free after SS (with 3x clock delay) as long as the output
voltage monitored through VSEN is within specifications.
7
SYNC
Synchronization Pin. The controller synchronizes on the falling edge of a square wave provided to
this pin. Short to GND if not used.
8
COMP
Output of the error amplifier
9
FB
Inverting input to the error amplifier
10
VSEN
Output Voltage Sense
11
FBG
Remote Ground Sense
12
CSN/VO
Inductor differential sense inverting input
13
CSP
Inductor differential sense non−inverting input
14
ROSC/EN
Programs the switching frequency; EN: Pull−low to disable the device
15
VCC
Supply rail for the controller internal circuitry
16
GND
Ground reference
THERMAL PAD
Connects with the silicon substrate for good thermal contact with the PCB. Connect to GND plane.


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