NCP6335XFCCT1G Просмотр технического описания (PDF) - ON Semiconductor
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NCP6335XFCCT1G Datasheet PDF : 35 Pages
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NCP6335xFCCT1G
1
2
3
4
A
VSEL
EN
SCL
FB
B
SDA
PGND
INTB*
PGND
PG*
AGND
C
PGND
PGND
PGND
PGND
D
AVIN
PVIN
SW
SW
E
PVIN
PVIN
SW
SW
Figure 3. Pin Out (Top View)
*Optional
PIN FUNCTION DESCRIPTION
Pin
Name
Type
REFERENCE
D1
AVIN
Analog Input
B4
AGND
Analog Ground
CONTROL AND SERIAL INTERFACE
A2
EN
Digital Input
A1
VSEL
Digital Input
A3
SCL
B1
SDA
B3
PGND
PG
B2
PGND
INTB
DCDC CONVERTER
D2, E1,
E2
PVIN
D3, D4,
E3, E4
C1, C2,
C3, C4
SW
PGND
Digital Input
Digital
Input/Output
Digital Output
Analog ground
Digital Output
Analog Ground
Power Input
Power Output
Power Ground
A4
FB
Analog Input
Description
Analog Supply. This pin is the device analog and digital supply. Could be connected
directly to the VIN plane just next to the 4.7 mF PVIN capacitor or to a dedicated
1.0 mF ceramic capacitor.
Analog Ground. Analog and digital modules ground. Must be connected to the
system ground.
Enable Control. Active high will enable the part. There is an internal pull down
resistor on this pin.
Output voltage / Mode Selection. The level determines which of two programmable
configurations to utilize (operating mode / output voltage). There is an internal pull
down resistor on this pin; could be left open if not used.
I2C interface Clock line. There is an internal pull down resistor on this pin; could be
left open if not used
I2C interface Bi−directional Data line. There is an internal pull down resistor on this
pin; could be left open if not used
Power Good open drain output. If not used has to be connected to ground plane
Interrupt open drain output. If not used has to be connected to ground plane
Switch Supply. These pins must be decoupled to ground by a 4.7 mF ceramic
capacitor. It should be placed as close as possible to these pins. All pins must be
used with short heavy connections.
Switch Node. These pins supply drive power to the inductor. Typical application uses
0.470 mH inductor; refer to application section for more information.
All pins must be used with short heavy connections.
Switch Ground. This pin is the power ground and carries the high switching current.
High quality ground must be provided to prevent noise spikes. To avoid high−density
current flow in a limited PCB track, a local ground plane that connects all PGND pins
together is recommended. Analog and power grounds should only be connected
together in one location with a trace.
Feedback Voltage input. Must be connected to the output capacitor positive terminal
with a trace, not to a plane. This is the positive input to the error amplifier.
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