S-8327 Seiko, S-8327 Datasheet - Page 7

• 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
6
Output voltage
Input voltage
Operation start voltage
Oscillation start voltage
Operation holding voltage
Current consumption 1
Current consumption 2
Switching current
Switching transistor leak
current
Line regulation
Load regulation
Output voltage
temperature
coefficient
Oscillation frequency
Max. duty ratio
Soft start time
Efficiency
1-3.
External parts used:
Applied V
Note 1: The output voltage specified above is the typical value of the output voltage.
-Coil:
-Diode:
-Capacitor:
Parameter
S-8323CXXMA
IN
=output voltage´0.6, I
CD54 (100 H) of Sumida Electric Co., Ltd.
MA720 (Schottky type) of Matsushita Electronic Components Co., Ltd.
F93 (16V, 22 F, tantalum type) of Nichicon Corporation)
Symbol
MaxDuty
V
OUT
EFFI
V
OUT
V
V
V
I
fosc
V
V
I
I
T
V
I
SWQ
SS2
SS1
SW
OUT
HLD
ST1
ST2
=output voltage/250
OUT1
OUT2
SS
IN
/ Ta Ta=-40 C to +85 C
I
No external parts, voltage applied to V
CONT pulled up to 5 V by 10k
Measured by decreasing V
V
V
VCONT=0.4V
V
V
I
Measured waveform at CONT pin
Measured waveform at CONT pin
V
V
OUT
OUT
OUT
OUT
OUT
IN
OUT
OUT
= output voltage 0.4 to 0.6
=1mA
=10 A to I
=output voltage 0.95
=output voltage+0.5
= VCONT=9V
=output voltage 0.95
=output voltage 0.95
OUT
Conditions
Seiko Instruments Inc.
(below) 1.25
IN
voltage gradually.
S-8323C30MA
S-8323C27MA
S-8323C25MA
S-8323C30MA
S-8323C27MA
S-8323C25MA
S-8323C30MA
S-8323C27MA
S-8323C25MA
S-8323C30MA
S-8323C27MA
S-8323C25MA
S-8323C30MA
S-8323C27MA
S-8323C25MA
S-8323C30MA
S-8323C27MA
S-8323C25MA
OUT
2.928
2.635
2.440
Min.
0.7
3.0
61
25
75
—
—
—
—
—
—
—
—
—
78
61
—
—
—
—
—
—
—
—
—
(Unless otherwise specified: Ta=25 C)
Typ.
3.000
2.700
2.500
±0.15
±0.14
±0.13
11.6
10.5
125
9.8
3.0
2.9
2.9
6.0
98
98
30
30
30
83
81
77
77
—
—
—
—
—
Max.
3.072
2.765
2.560
12.0
19.3
17.5
16.3
0.9
0.8
5.9
5.8
5.8
1.0
60
60
35
90
—
—
—
—
—
—
—
—
—
—
9
mV/ C
Unit
kHz
mA
mV
ms
%
%
V
A
A
Test circuit
—
—
1
2
1
2
1
2
2