S-8330/8331 Series
www.sii-ic.com
© Seiko Instruments Inc., 1996-2010
STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL
SWITCHING REGULATOR
Rev.6.0
_00
The S-8330/8331 Series is a CMOS PWM-control step-up switching regulator which mainly consists of a
reference voltage source, an oscillation circuit, a power MOS FET (for S-8330 Series) , and an error amplifier.
The output voltage can adjust by built-in Electric volume circuit, and equip with shutdown function. The S-8330
Series is low current consumption because of CMOS structure , and a step-up switching regulator constructed
by externally connecting only a coil, a capacitor and a diode. This feature, along with its 8-Pin SSOP package
and a few external components, makes the S-8330 Series ideal for LCD bias generators of portable equipment.
For applications requiring a high output current, products used with an external transistor (S-8331 Series) are
also available.
Features
•
Maximum output voltage: 20 V to 30 V (2 V step)
12 V range can be adjusted by electric volume
•
Output voltage accuracy :±2.4%
•
Output current: 5 mA (V
IN
= 5 V,V
OUT
= 30 V)
•
Low current consumption :
During operation: 100
μA
(typ.) (V
IN
= 5 V 180 kHz)
During shutdown: 1.0
μA
(max.)
•
Shutdown function: Stepping up operation is stopped , and Vout pin is shorted to GND while shutdown.
•
Input voltage range: 2.0 to 9.0 V
•
Soft start function
•
Built-in CR oscillation circuit:
Oscillating frequency: 180 kHz (typ.) (A series)
Oscillating frequency: 50 kHz (typ.) (B series)
•
8-bit built-in electric volume circuit
•
External transistor type is available (S-8331 Series)
•
Lead-free
*1
*1.
Refer to “
Product Name Structure”
for details.
Applications
•
Power supplies for medium type or large type LCD panel
•
Power supplies for portable devices such as pagers, handy calculators, and remote controllers
•
Constant voltage power supplies for cameras, video equipment, and communication equipment
Package
•
8-Pin SSOP
Seiko Instruments Inc.
1
STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL SWITCHING REGULATOR
S-8330/8331 Series
Block Diagram
Rev.6.0
_00
L
SD
CONT
VOUT
+
VIN
PWM
Control
Circuit
+
−
VDIN
CL
VCLK
VSTRB
External
Transistor
V
REF
RESET
L
VIN
−
Rb
Cb
EXT
CR Oscillation
Circuit
VSS
ON/OFF
VSS
(1)
S-8330 Series
Figure 1
Block Diagram
(2) S-8331 Series
Product Name Structure
1.
Product Name
S - 833 x x xx FS - T2 - G
Environmental code
G: Lead-free (for details, please contact our sales office)
IC direction in tape specifications
*1
Package name (abbreviation)
Maximum Output voltage
Product category
A: fosc=180 kHz
B: fosc= 50 kHz
Power transistor
0: Built-in switch
1: External transistor
*1.
2.
Refer to the taping specifications at the end of this book.
Package
Drawing code
Tape
FS008-A-C-SD
Package name
8-Pin SSOP
Package
FS008-A-P-SD
Reel
FS008-A-R-SD
3.
Product list
S-8330BXXFS
Series
S-8330AXXFS
Series
S-8330A20FS-T2-G
S-8330B20FS-T2-G
S-8330A22FS-T2-G
S-8330B22FS-T2-G
S-8330A24FS-T2-G
S-8330B24FS-T2-G
S-8330A26FS-T2-G
S-8330B26FS-T2-G
S-8330A28FS-T2-G
S-8330B28FS-T2-G
S-8330A30FS-T2-G
S-8330B30FS-T2-G
Seiko Instruments Inc.
S-8331AXXFS
Series
S-8331A20FS-T2-G
S-8331A22FS-T2-G
S-8331A24FS-T2-G
S-8331A26FS-T2-G
S-8331A28FS-T2-G
S-8331A30FS-T2-G
Output voltage range (V)
8 to 20
10 to 22
12 to 24
14 to 26
16 to 28
18 to 30
2
Rev.6.0
_00
STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL SWITCHING REGULATOR
S-8330/8331 Series
Pin Configuration
8-pin SSOP
Top view
1
2
3
4
8
7
6
5
Description
Electric volume data input pin
Electric volume clock input pin
Electric volume strobe signal input pin
Output voltage pin
Power supply pin
External inductor connection pin (Note 1)
External transistor connection pin (Note 2 )
Shutdown pin
7
ON / OFF
“H”: normal operation
(stepping up operation)
“L”: stop stepping up operation
8
V
SS
GND pin
Note 1: S-8330 Series: Open drain output
Note 2: S-8331 Series: CMOS output
Pin No.
1
2
3
4
5
6
Symbol
VDIN
VCLK
VSTRB
V
OUT
V
IN
CONT
EXT
Figure 2
Seiko Instruments Inc.
3
STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL SWITCHING REGULATOR
S-8330/8331 Series
Absolute Maximum Ratings
Rev.6.0
_00
(Unless otherwise specified: Ta=25°C)
Parameter
V
OUT
pin voltage
CONT pin voltage
CONT pin current
EXT pin voltage
EXT pin current
Input voltage
Symbol
V
OUT
V
CONT
I
CONT
V
EXT
I
EXT
V
DIN
, V
CLK
, V
STRB
,
V
IN
, V
ON/OFF
P
D
Ratings
V
SS
−
0.3 to 33
V
SS
−
0.3 to 33
300
V
SS
−
0.3 to V
OUT
+0.3
±50
V
SS
−
0.3 to 10
300 (When not mounted on board)
500 (Note 1)
−20
to +70
−40
to +125
Unit
V
V
mA
V
mA
V
mW
mW
°C
°C
Power dissipation
Operating temperature range
T
opr
Storage temperature
T
stg
Note 1: When mounted on board
[Mounted board]
(1) Board size : 114.3 mm
×
76.2 mm
×
t1.6 mm
(2) Board name : JEDEC STANDARD51-7
Caution The absolute maximum ratings are rated values exceeding which the product could
suffer physical damage. These values must therefore not be exceeded under any
conditions.
(1)
Power Dissipation P
D
(mW)
When mounted on board
600
500
400
300
200
100
0
0
50
100
150
(2)
Power Dissipation P
D
(mW)
When not mounted on board
400
300
200
100
0
0
50
100
150
Ambient Temperature Ta (°C)
Ambient Temperature Ta (°C)
Figure 3
Power Dissipation of Package
4
Seiko Instruments Inc.
Rev.6.0
_00
STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL SWITCHING REGULATOR
S-8330/8331 Series
Electrical Characteristics
1.
S-8330A Series
Step-Up Switching Regulator
(Unless otherwise specified: Ta=25°C)
Items
Symbols
S-8330A20FS
S-8330A22FS
Output voltage range
VOUT
S-8330A24FS
S-8330A26FS
S-8330A28FS
S-8330A30FS
Output voltage accuracy
Input voltage
Current consumption 1
Current consumption 2
Current consumption
during power off
Switching current
Switching transistor
leakage current
S-8330A20FS
S-8330A22FS
Line regulation
ΔVOUT1
V
IN
=3 V to 6 V
S-8330A24FS
S-8330A26FS
S-8330A28FS
S-8330A30FS
Load regulation
ΔVOUT2
V
IN
=5 V
I
OUT
=output voltage/2.4 MΩ to
output voltage/24 kΩ
S-8330A20FS
S-8330A22FS
Output voltage
temperature coefficient
ΔVOUT/ΔTa
Ta= -20°C to +70°C S-8330A24FS
S-8330A26FS
S-8330A28FS
S-8330A30FS
Oscillating frequency
Maximum duty ratio
fosc
Max Duty
VSH1
Power off terminal
input voltage
Power off terminal
input leakage current
Soft start time
Efficiency
TSS
EFFI
1
—
3
85
6
—
ms
%
—
5
VSH2
VSL
ISL
V
OUT
=output voltage×0.95
Measure waveform at CONT pin
V
OUT
=output voltage×0.95
Measure waveform at CONT pin
VOUT =output voltage×0.95
Check oscillation at CONT pin
V
OUT
=output voltage×0.95
Check oscillation stop at CONT pin
V
IN
=9 V
-1
—
1
μA
1
V
IN
≥
3.0 V
V
IN
< 3.0 V
2.4
1.6
—
—
—
—
—
—
0.4
V
2
60
72
84
%
2
—
—
—
—
—
—
144
±1.0
±1.1
±1.2
±1.3
±1.4
±1.5
180
—
—
—
—
—
—
216
kHz
2
mV/°C
5
—
—
—
—
—
—
—
±300
±330
±360
±390
±420
±450
±30
—
—
—
—
—
—
—
mV
5
mV
5
ISW
ISWQ
VIN
ISS1
ISS2
ISSS
V
IN
=5 V, V
OUT
= Output voltage Max.
V
IN
=2 V, V
OUT
= Output voltage Min.
Power off pin
=VDIN=0 V,V
IN
=VCLK=VSTRB=5 V
VCONT=0.4 V
Power off pin =0 V , VCONT=9 V
100
—
200
—
—
1.0
mA
μA
—
3
2.0
—
—
—
—
100
50
—
Conditions
Min.
8
10
12
14
16
18
Typ.
—
—
—
—
—
—
Max.
20
22
24
26
28
30
±2.4%
9.0
200
100
1.0
%
V
μA
μA
μA
5
2
4
4
4
V
5
Unit
Mea.Circ.
Seiko Instruments Inc.
5
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