S-8327 Seiko, S-8327 Datasheet - Page 25

• 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
Output
Voltage
V
24
OUT
8. Flash Memory Power Supply
(V)
The following are a circuit example and its characteristics for a 5 V Flash Memory, 16 Mbit (5V/120mA) on a single lithium
battery (2.4 V to 4.4 V).
Output
Voltage
V
33
32
31
30
29
28
27
OUT
V
0.01
IN
(V)
(a)Output Current - Output Voltage
5.10
5.06
5.02
4.98
4.94
4.90
0.01
Output Current I
C
(a)Output Current - Output Voltage
IN
0.1
+
-
CD54/47 H
Output Current I
0.1
L
2SD1628
OUT
1.
1.
(mA)
OUT
10.
(mA)
10.
0.0022 F
Control
1 k
Signal
Cb
R
VIN=2.7V
VIN=3.0V
VIN=4.5V
VIN=5.0V
Figure 29
b
100.
Seiko Instruments Inc.
VIN=2.0V
VIN=2.4V
VIN=3.6V
VIN=4.4V
Figure 30
100.
EXT
ON/OFF
Efficiency
1000.
Figure 28
(%)
SD
MA720
S-8327B50
Efficiency
(%)
V
S
100
80
60
40
20
(b)Output Current - Efficiency
0
0.01
100
80
60
40
20
(b)Output Current - Efficiency
0
0.01
V
OUT
VIN=2.7V
VIN=3.0V
VIN=4.5V
VIN=5.0V
Output Current I
0.1
Output Current I
VIN=2.0V
VIN=2.4V
VIN=3.6V
VIN=4.4V
0.1
C
OUT
+
-
1.
47 F
F93
OUT
1.
OUT
5V
(mA)
10.
(mA)
10.
100.
100.
1000.