MB3778 Datasheet, PDF (19/29 Pages) Fujitsu Component Limited. – Switching Regulator Controller

s TYPICAL CHARACTERISTICS
Power supply voltage vs.
Reference voltage
5.0
Ta = +25 °C
MB3778
Power supply voltage vs.
Average supply current
2.0
Ta = +25 °C
2.5
1.0
0
0
4
8
12
16
20
Power supply voltage VCC (V)
Reference voltage vs. Temperature
2.47
2.46
VCC = VCTL = 6 V
IOR = −1 mA
2.45
2.44
2.43
2.42
2.41
2.40
−40 −20 0
20 40 60 80 100
Temperature Ta (°C)
Collector saturation voltage vs.
Sink Current
5.0
VCC = 6 V
Ta = +25 °C
4.0
3.0
2.0
1.0
0
0
100 200 300 400 500
Sink current (mA)
0
0
4
8
12
16
20
Power supply voltage VCC (V)
Timing capacitor vs.
Triangular waveform Upper/Lower Limit voltage
2.2
2.0
Upper limit
1.8
1.6
1.4
1.2
Lower limit
VCC = 6 V
RT = 15 kΩ
1.0
Ta = +25 °C
0.8
10²
10³
10⁴
Timing capacitor CT (pF)
Error Amp. Max. output voltage vs.
Frequency
3.0
VCC = 6 V
Ta = +25 °C
2.0
1.0
0
100
500 1 k
5 k 10 k
50 k 100 k 500 k
Frequency (Hz)
19