S-8331A22FS-T2-G Seiko Instruments, S-8331A22FS-T2-G Datasheet - Page 16
S-8331A22FS-T2-G
Manufacturer Part Number
S-8331A22FS-T2-G
Description
IC REG SW PWM SHTDN 10-22V 8SSOP
Manufacturer
Seiko Instruments
Type
Step-Up (Boost)r
Datasheet
1.S-8330A20FS-T2-G.pdf
(41 pages)
Specifications of S-8331A22FS-T2-G
Internal Switch(s)
No
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
10 ~ 22 V
Current - Output
5mA
Frequency - Switching
180kHz
Voltage - Input
2 ~ 9 V
Operating Temperature
-20°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
8-SSOP
Power - Output
300mW
Output Voltage
22 V
Operating Temperature Range
- 20 C to + 70 C
Mounting Style
SMD/SMT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
16
STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL SWITCHING REGULATOR
S-8330/8331 Series
When taking into consideration ESR (Electric Series Resistance) RESR of IOUT and COUT during t1:
When substituting equation (15) for equation (11):
The effective methods to reduce the ripple voltage are to maximize the capacitance of the capacitor
connected to the output pin and to minimize ESR.
V
P
−
V
P
P
=
−
P
C
Δ
=
OUT
Q
I (
1
PK
=
I 2
−
C
PK
I
OUT
OUT
1
)
2
•
⎛
⎜
⎝
•
I
PK
C
t
OFF
OUT
+
2
I
OUT
+
⎛
⎜
⎝
I
⎞
• ⎟
⎠
PK
1 t
+
Seiko Instruments Inc.
2
+
I
OUT
⎛
⎜
⎝
I
PK
⎞
• ⎟
⎠
+
2
R
I
OUT
ESR
⎞
• ⎟
⎠
R
ESR
−
I
OUT
C
OUT
•
t
1
Rev.6.0
(15)
(16)
_00