s-8333aaca-t8t1g Seiko Instruments Inc., s-8333aaca-t8t1g Datasheet - Page 6

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

*1. The recommended range of the resistance (R
*2. Set max. duty; Between 47 and 88.5 % (R
*3. The short-circuit protection time can be set by the external capacitor. Although the maximum set value by the external capacitor is
6
Timer latch reset voltage
Operating input voltage V
FB voltage
Current consumption
EXT pin output current
FB voltage temperature
coefficient
FB pin input current
Oscillation frequency
Oscillation frequency
temperature coefficient
Max. duty
Soft-start time
Short-circuit protection
delay time
UVLO detection voltage V
UVLO hysteresis width V
CC pin output current
STEP-UP, FOR LCD BIAS SUPPLY, 1-CHANNEL, PWM CONTROL SWITCHING REGULATOR CONTROLLER
S-8333 Series
This range of oscillation frequency is the typical value when an ideal resistor is connected externally. In actual use, it is necessary to
take account the dispersion of an IC (±10%) into this value.
unlimited under the ideal condition, set C
This range of max. duty is the typical value when an ideal resistor is connected externally. In actual use, it is necessary to take
account the dispersion of an IC (±5%) into this value.
Electrical Characteristics
Parameter
*2
*3
Between 47 and 80 % (R
*1
V
I
I
I
∆V
∆Ta
I
f
∆f
∆Ta
MaxDuty
t
t
I
I
SS1
EXTH
EXTL
FB
osc
SS
PRO
CCH
CCL
V
V
Symbol
IN
FB
UVLO
UVLOHYS
osc
RTLT1
RTLT2
FB
f
V
V
V
Ta = −40 to +85°C
When f
(R
When f
(R
When f
(R
V
Waveform on EXT pin is measured.
Ta = −40 to +85°C
f
f
MaxDuty = 88.5% (R
MaxDuty = 73% (R
MaxDuty = 47% (R
f
MaxDuty = 88.5% (R
t
Selected in three steps
t
(CSP = 0.1 µF)
V
Selected in 0.1 V steps
V
Selected in 0.1 V steps
V
V
Within short-circuit protection delay
time
After short-circuit protection circuit
operated
osc
osc
osc
osc
SS
PRO
FB
EXT
EXT
FB
UVLO
UVLOHYS
FB
FB
OSC
OSC
OSC
Duty
SP
= 10 ms, 15 ms, 20 ms
Table 4 Electrical Characteristics
= 700 kHz
= 700 kHz
= 1133 kHz (R
= 700 kHz (R
= 0.95 V
= 0.9 V
= 2 V
= 0 V
Duty
= 50 ms
= V
= 0.4 V
/R
= approx. 0.47 µF as a target maximum value due to discharge time of the capacitor.
= 120 kΩ)
= 200 kΩ)
= 510 kΩ)
= 1.5 V to 2.3 V
/R
osc
osc
osc
osc
OSC
IN
OSC
) for oscillation frequency is R
= 0.1 V to 0.3 V
= 1133 kHz is set
= 700 kHz is set
= 286 kHz is set
− 0.4 V
= 1.0 to 3.2); the oscillation frequency is less than 500 kHz
Seiko Instruments Inc.
Conditions
= 0.5 to 3.2); the oscillation frequency is 500 kHz or more



OSC
OSC
Duty
Duty
Duty
= 200 kΩ)
Duty
= 120 kΩ)
= 180 kΩ)
= 390 kΩ)
= 62 kΩ)
= 100 kΩ)
(Unless otherwise specified: V
osc
MaxDuty
V
× 0.75
× 0.95
× 0.95
0.985
V
UVLOHYS
V
× 0.9
× 0.6
Min.
−0.1
37.5
37.5
= 120 kΩ to 510 kΩ (f
100
−75
1.8
f
− 5
0.7
t
UVLO
UVLO




osc
SS
MaxDuty
V
UVLOHYS
1.000
V
V
−100
±100
1000
Typ.
450
160
−50
1.0
f
t
UVLO
UVLO
50
50


osc
SS
MaxDuty
V
× 1.05
× 1.05
UVLOHYS
1.015
V
−37.5
V
OSC
Max.
× 1.1
× 1.5
× 1.4
+0.1
700
−60
6.0
f
+ 5
1.3
t
UVLO
UVLO



75
75
osc
SS
IN
= 286 kHz to 1.133 MHz).
= 3.3 V, Ta = 25°C)
ppm/°C
ppm/°C
Unit
kHz
mA
mA
ms
ms
µA
µA
µA
µA
%
V
V
V
V
V
V
Rev.2.3
Circuit
Test
2
2
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
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