mb3775pfv Fujitsu Microelectronics, Inc., mb3775pfv Datasheet - Page 14

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

14
MB3775
Fig. 15 - Timing resistor vs. Oscillation Frequency
Fig. 17 - Timing capacitor vs. Triangular waveform Max Amplitude voltage
Fig. 19 - Frequency vs. Gain/Phase (Actual Data)
100k
10k
100
1M
1k
2.0
1.8
1.6
1.4
1.2
1.0
40
20
2.2
60
0
20
40
60
10
1k
10
0
1
10
1
10
10k
Timing capacitor C
10
Timing resistor R
2
Frequency f (Hz)
2
10
Timing resistance=15 k
V
3
CC
100k
10
10
= 6 V
3
4
Phase
Gain
10
T
T
( )
(pF)
C
5
C
C
C
FB
T
T
1M
T
10
10
= 1 F
= 15000 pF
= 1500 pF
= 150 pF
4
6
10
7
180
10M
90
180
0
90
10
5
Fig. 16 - Triangular waveform cycle vs. Timing capacitor
Fig. 20 - Frequency vs. Gain/Phase (Actual Data)
10
10
10
10
10
Fig. 18 - Frequency vs. Gain/Phase
40
20
60
0
20
40
60
40
20
60
20
40
60
-1
0
2
1
0
3
10
10
1k
1
0
10
1
10k
10
10
Timing capacitor C
2
2
Frequency f (Hz)
Frequency f (Hz)
10
Timing resistance = 15 k
V
CC
3
100k
Phase
10
= 6 V
Gain
10
3
Phase
4
Gain
10
C
T
FB
5
(pF)
1M
10
= 0.1 F
10
4
6
10
10M
7
180
10
90
180
0
90
180
5
(Continued)
90
180
90
0
90