MC33470_06 Datasheet, PDF (6/15 Pages) ON Semiconductor – Synchronous Rectification DC/DC Converter Programmable Integrated Controller

MC33470
1000
0
Gain
30
100
V_CCP = 12 V
V_CC = 5.0 V
V_O = 2.8 V
R2 = 18.2 k
C16 = 0
10
T_A = 25°C
Figure 14
60
90
Phase
120
150
1.0
1.0
10
100
FREQUENCY (kHz)
180
1000
Figure 8. Drive Output Source/Sink Saturation
Voltage versus Load Current
0.8
I_O = 3.3 A
0.6
V_O = 2.8 V
0.4
0.2
0
−0.2
−75 −50 −25 0 25 50 75 100 125
T_A, AMBIENT TEMPERATURE (°C)
Figure 9. Feedback Threshold Voltage
versus Temperature
4.0
2.0
I_O = 3.3 A
V_O = 2.8 V
0
−2.0
−4.0
−6.0
−75 −50
−25 0 25 50 75
T_A, AMBIENT TEMPERATURE (°C)
100 125
Figure 10. I_max Current versus Temperature
5.0
4.0
I_O = 3.3 A
2.0 ^{VO = 2.8 V}
0
−2.0
−4.0
−5.0
−75 −50 −25 0 25 50 75 100 125
T_A, AMBIENT TEMPERATURE (°C)
Figure 11. V_sense Current Source
versus Temperature
1.0
0.5
0
−0.5
−1.0
−1.5
−2.0
−2.5
−3.0
V_CC Increasing
−3.5
I_O = 3.3 A
V_O = 2.8 V
−4.0
−75 −50 −25 0 25 50 75 100 125
T_A, AMBIENT TEMPERATURE (°C)
Figure 12. V_CC Undervoltage Lockout Trip Point
versus Temperature
2.5
2.0
1.5 _{IO = 3.3 A}
1.0 ^VO ^{= 2.8 V}
0.5
0
−0.5
−1.0
−1.5
−2.0
−2.5
−75 −50 −25 0 25 50 75 100 125
T_A, AMBIENT TEMPERATURE (°C)
Figure 13. Oscillator Frequency
versus Temperature
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