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MB39A105
8
(Continued)
Triangular Wave Oscillation Frequency
vs. Timing Resistor
Triangular wave oscillation
frequency f
OSC (kHz)
Timing resistor RT (kΩ)
Triangular Wave Oscillation Frequency
vs. Ambient Temperature
Triangular wave oscillation
frequency f
OSC (kHz)
Ambient temperature Ta (°C)
Error Amplifier Gain and Phase
vs. Frequency
Frequency f (Hz)
Max On Duty (%)
Max On Duty vs.
Triangular Wave Oscillation Frequency
Triangular wave oscillation frequency f
OSC (kHz)
Ta = +25 °C
VCC = 3.3 V
10000
1000
100
10
1 10 100
VCC = 3.3 V
RT = 7.5 kΩ
600
550
500
450
400
−40 −20 0 20 40 60 80 100
Ta = +25 °C
VCC = 3.3 V
100
95
90
85
80
75
70
10 100 1000 10000
−
+
+
+
10
11
9
IN
OUT
Error Amp
1 µF
1.24 V
10 kΩ
2.4 kΩ
240 kΩ
10 kΩ
40
30
20
10
0
−10
−20
−30
−40
180
90
0
−90
−180
100 1 k 10 k 100 k 1 M 10 M
Ta = +25 °C
VCC = 3.3 V
AV
ϕ
Phase φ (deg)
Gain A
V (dB)