ncv8925 ON Semiconductor, ncv8925 Datasheet - Page 2

• Manufacturer Part Number: ncv8925
• Description: 3 Mhz, 600 Ma Step-down Dc-dc Converter
• Manufacturer: ON Semiconductor

PIN FUNCTION DESCRIPTION
TSOP-5
Pin
1
2
3
4
5
Enable
Vin
Figure 4. Pin Connections - TSOP-5
UDFN6
Pin
2, 4
GND
3
1
6
5
GND
VIN
EN
VIN
1
2
3
EN
1
2
3
Pin Name
(Top View)
GND
VIN
EN
FB
LX
Logic Control
& Thermal
Shutdown
5
4
I
Power Ground
Analog Output
LIMIT
Analog Input
LX
FB
Power Input
Digital Input
PWM/PFM
Analog /
Analog /
Control
Type
Figure 3. Simplified Block Diagram
Q1
PIN CONNECTIONS
http://onsemi.com
Power supply input for the PFET power stage, analog and digital blocks. The
pin must be decoupled to ground by a 10 mF ceramic capacitor.
This pin is the GND reference for the NFET power stage and the analog sec‐
tion of the IC. The pin must be connected to the system ground.
Enable for switching regulators. This pin is active HIGH and is turned off by
logic LOW on this pin.
Feedback voltage from the output of the power supply. This is the input to the
error amplifier.
Connection from power MOSFETs to the Inductor.
NCV8925
4.7 mF
Reference
Voltage
2
Q2
Figure 5. Pin Connections - UDFN6
GND
FB
LX
6
5
4
GND
VIN
EN
Description
1
2
3
(Top View)
2.2 mH
4.7 mF
6
5
4
FB
LX
GND
Vout
220 k
220 k
18 pF