s-8333aaca-t8t1g Seiko Instruments Inc., s-8333aaca-t8t1g Datasheet - Page 22

• Manufacturer Part Number: s-8333aaca-t8t1g
• Description: Step-up, For Lcd Bias Supply, 1-channel, Pwm Control Switching Regulator Controller
• Manufacturer: Seiko Instruments Inc.

22
STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL, PWM CONTROL SWITCHING REGULATOR CONTROLLER
S-8333 Series
2. Example of Major Power Supply Dependence Characteristics (Ta = 25°C)
I
I
I
MaxDuty vs. V
SS
EXTH
FB
−0.02
−0.04
−0.06
−0.08
−0.10
1400
1200
1000
−200
−180
−160
−140
−120
−100
vs. V
vs. V
0.10
0.08
0.06
0.04
0.02
800
600
400
200
−80
−60
−40
−20
100
vs. V
90
80
70
60
50
40
30
20
10
0
0
0
0
IN
IN
0
0
0
0
f
(R
f
(R
IN
OSC
OSC
f
(R
OSC
OSC
OSC
OSC
= 1133 kHz
= 700 kHz
1
1
1
1
IN
= 700 kHz, MaxDuty = 73%
= 120 kΩ)
= 200 kΩ)
= 200 kΩ, R
MaxDuty = 88.5% (R
MaxDuty = 73% (R
MaxDuty = 47% (R
2
2
2
2
3
Duty
3
3
V
V
V
3
V
IN
IN
IN
IN
= 300 kΩ)
[V]
[V]
[V]
[V]
4
4
4
4
OSC
OSC
OSC
f
(R
= 200 kΩ, R
= 200 kΩ, R
OSC
= 200 kΩ, R
OSC
5
5
5
5
= 286 kHz
= 510 kΩ)
Duty
Duty
Duty
= 300 kΩ)
= 640 kΩ)
6
6
6
6
= 100 kΩ)
Seiko Instruments Inc.
7
7
7
7
I
f
t
EXTL
OSC
SS
1400
1200
1000
vs. V
25.0
20.0
15.0
10.0
200
180
160
140
120
100
800
600
400
200
vs. V
5.0
vs. V
80
60
40
20
0
0
0
IN
0
0
0
IN
IN
f
(R
f
f
f
OSC
OSC
OSC
OSC
OSC
1
1
1
= 700 kHz, MaxDuty = 73%
= 1133 kHz (R
= 700 kHz (R
= 286 kHz (R
= 200 kΩ, R
2
2
2
Duty
3
3
3
V
V
V
OSC
OSC
IN
IN
IN
OSC
= 300 kΩ)
[V]
[V]
[V]
= 200 kΩ)
= 510 kΩ)
= 120 kΩ)
4
4
4
t
t
SS
SS
= 20 ms
= 10 ms
5
5
5
6
6
6
Rev.2.3
7
7
7
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