MB3785A Datasheet, PDF (13/29 Pages) Fujitsu Component Limited. – Switching Regulator Controller (4 Channels plus High-Precision, High-Frequency Capabilities)

MB3785A
(Continued)
13. Gain vs. Frequency and Phase vs. Frequency
14. Error amp maximum output voltage vs. Frequency
40
20
0
–20
–40
1K
Ta = +25°C
180
Aϑ
90
0
φ
–90
10 K
100 K
1M
Frequency f (Hz)
–180
10 M
3.0
CH 1
2.0
VCC = 6V
Ta = +25°C
1.0
0
100 500 1 K 5 K 10 K 50 K 100 K 500 K 1 M
Triangular wave frequency fOSC (Hz)
[Measuring Circuit]
2.5 V 2.5 V
4.7 kΩ
IN
10
–
µ_+F
4.7 kΩ
4.7 kΩ ^{240 kΩ}
–
+
4.7 kΩ
Error amp
OUT
15. Power dissipation vs. Ambient temperature
1000
800
600
LQFP
550
400
200
0
–30 –20 0
20 40
60 80 100
Ambient temperature Ta (°C)
13