W83321G Nuvoton Technology Corporation of America, W83321G Datasheet - Page 8
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W83321G
Manufacturer Part Number
W83321G
Description
IC BUCK SYNC ADJ 8SOIC
Manufacturer
Nuvoton Technology Corporation of America
Type
Step-Down (Buck)r
Datasheet
1.W83321G.pdf
(18 pages)
Specifications of W83321G
Internal Switch(s)
No
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
0.8 ~ 5 V
Frequency - Switching
250kHz
Voltage - Input
5V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
8-SOIC
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Output
-
Power - Output
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
W83321G
Manufacturer:
WINBOND/华邦
Quantity:
20 000
cycle is initiated. If the cause of the overcurrent is still present after the delay interval, the current limit
would be triggered again. The shut dowm - delay - soft start cycle will be repeated indefinitely untill the
overcurrent event has cleared.
I
7. APPLICATION CIRCUIT
Local charge pump for VBOOT application:
Separate VCC12 rail for VBOOT application:
PEAK
VOUT=0.8X(R5+R6)/R6
VOUT=0.8X(R5+R6)/R6
= (I
OCSET
x R
C6
2000uF
C6
2000uF
OCSET
C7
2000uF
C7
2000uF
) / R
DS(ON)
0.1uF
C8
0.1uF
C8
L1
L1
3.3uH
3.3uH
R
DS(ON)
R3
2.2
6.8nF
C10
R3
2.2
6.8nF
C10
:Low Side MOSFET Resistance
2000uF
C2
2000uF
C2
C3
1uF
N DSG
N DSG
VCC12
C3
1uF
N DSG
N DSG
- 8 -
VCC5
Q1
Q2
VCC5
Q1
Q2
3
3
1000uF
C1
3
3
C1 0.1uF
R7 10
D1
1N4148/Shuttky
C11
1uF
W83321S/W83321G
1
2
3
4
1
2
3
4
BOOT
UGATE
GND
LGATE
U1
R5 16K(1%)
BOOT
UGATE
GND
LGATE
U1
R5 16K(1%)
R1 3.7K
R1 3.7K
W83321S
W83321S
COMP
ISEN
COMP
VCC
R6
7.5K(1%)
ISEN
VCC
R6
FB
7.5K(1%)
FB
8
7
6
5
8
7
6
5
C5 2.2nF
C5 2.2nF
R4 10
C9
1uF
R4 10
C9
1uF
C4 (OPT)
C4 (OPT)
R2 100K
VCC5
R2 100K
VCC5