S-8327 Seiko, S-8327 Datasheet - Page 5

• Manufacturer Part Number: S-8327
• Description: (S-8323 / S-8327) SMALL PACKAGE PWM CONTROL STEP-UP SWITCHING REGULATOR
• Manufacturer: Seiko

SMALL PACKAGE PWM CONTROL STEP-UP SWITCHING REGULATOR
S-8323/8327 Series


4
Electrical Characteristics
1-1.S-8323AXXMC
Output voltage
Input voltage
Operation start voltage
Oscillation start voltage
Operation holding voltage
Current consumption 1
Current consumption 2
Current consumption during
shutdown
Switching current
Switchin transistor leak
current
Line regulation
Load regulation
Output voltage
temperature
coefficient
Oscillation frequency
Max. duty ratio
Shutdown pin
Input voltage
(ON/OFF type)
Soft start time
Efficiency
External parts used:
Applied V
The shutdown pin is connected to V
Note 1: The output voltage specified above is the typical value.
- Coil:
- Diode:
- Capacitor: F93 (16V, 22 F, tantalum type) of Nichicon Corporation)
Parameter
IN
=output voltage 0.6, applied, I
CD54 (100 H) of Sumida Electric Co., Ltd.
MA720 (Schottky type) of Matsushita Electronic Components Co., Ltd.
Symbol
MaxDuty
V
VSL1
VSL2
EFFI
V
OUT
VSH
V
V
V
I
fosc
V
V
I
I
I
T
V
I
SWQ
SS2
SSS
SS1
SW
OUT
HLD
ST1
ST2
OUT1
OUT2
OUT
SS
IN
/ Ta Ta=-40 C to +85 C
pin.
OUT
I
No external parts, voltage applied to V
CONT pulled up to 5 V by 10k
I
graduelly
V
V
shutdown pin=0V
VCONT=0.4V
V
V
I
Measured waveform at CONT pin
Measured waveform at CONT pin
V
Measured the oscillation at CONT pin
V
Judged the stop of oscillation
at CONT pin
V
V
OUT
OUT
OUT
=output voltage/250
OUT
OUT
OUT
IN
OUT
OUT
OUT
OUT
=output voltage 0.4 to 0.6
=1mA
=1mA, Measured by decreasing V
=10 A to I
=output voltage 0.95
=output voltage+0.5
= VCONT=10V
=output voltage 0.95
=output voltage 0.95
=output voltage 0.95
=output voltage 0.95
OUT
Conditions
(below) 1.25
Seiko Instruments Inc.
S-8323A52MC
S-8323A50MC
S-8323A33MC
S-8323A30MC
S-8323A27MC
S-8323A25MC
S-8323A52MC
S-8323A50MC
S-8323A33MC
S-8323A30MC
S-8323A27MC
S-8323A25MC
S-8323A52MC
S-8323A50MC
S-8323A33MC
S-8323A30MC
S-8323A27MC
S-8323A25MC
S-8323A52MC
S-8323A50MC
S-8323A33MC
S-8323A30MC
S-8323A27MC
S-8323A25MC
S-8323A52MC
S-8323A50MC
S-8323A33MC
S-8323A30MC
S-8323A27MC
S-8323A25MC
When
V
When
V
S-8323A52MC
S-8323A50MC
S-8323A33MC
S-8323A30MC
S-8323A27MC
S-8323A25MC
OUT
OUT
<1.5V
IN
1.5V
OUT
voltage
4.075
4.880
3.221
2.928
2.635
2.440
Min.
42.5
0.75
114
114
0.7
3.0
78
75
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
78
61
61
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
(Unless otherwise specified: Ta=25 C)
Typ.
5.200
5.000
3.300
3.000
2.700
2.500
±0.26
±0.25
±0.17
±0.15
±0.14
±0.13
31.6
30.2
19.1
17.2
15.5
14.3
182
182
125
125
3.5
3.5
3.3
3.2
3.2
3.2
6.0
98
98
30
30
50
83
87
87
83
83
79
79
—
—
—
—
—
—
—
—
—
Max.
5.325
5.120
3.379
3.072
2.765
2.560
57.5
12.0
52.6
50.3
31.8
28.7
25.9
23.9
0.9
0.8
6.9
6.9
6.5
6.4
6.4
6.3
0.5
1.0
0.3
0.2
60
60
90
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
9
mV/ C
Unit
kHz
mA
mV
ms
%
%
V
V
A
A
Test circuit
—
—
—
1
2
1
2
1
2
1