mb3775pfv Fujitsu Microelectronics, Inc., mb3775pfv Datasheet - Page 20

• Manufacturer Part Number: mb3775pfv
• Description: Switching Regulator Controller
• Manufacturer: Fujitsu Microelectronics, Inc.

20
MB3775
Reference data
If an aluminum electrolytic smoothing capacitor (R
lytic capacitor (OS-CON: R
60
40
20
60
40
20
0
0
20
40
20
40
10
10
Fig. 33 - DC/DC Converter +5 V output
100
Fig. 34 - DC/DC Converter +5 V output
100
A
V
A
V
0.1 F
Frequency f (Hz)
Frequency f (Hz)
C
Fig. 32 - DC/DC Converter A
0.2 ), the phase shift is reduced by half (see Fig. 33 and 34).
FB
1k
1k
Error Amp.
62
+
10k
10k
27
C
C
V
V
C
R
R
P
P
CC
CC
+ IN
L
L
=0.1 F
=0.1 F
=25
V
=25
=10 V
=10 V
IN
REF
1.0 ) is replaced with a low ESR semiconductor electro-
V
R
V
OUT
vs.
1
100k
100k
characteristic Test Circuit
180
180
R
90
90
0
90
0
90
180
180
2
~
V
IN
V
A
0
V
Between this point.
+
vs.
+
+
OS-CON
220 F(16 V)
R
characteristic
AI Capacitor
22 F(16V)
R
C
C
0.2
1.0
fosc=1 kHz
f
osc
=1 kHz
V
V
GND
GND
0
0
+
+