MC34166 ON Semiconductor, MC34166 Datasheet - Page 4
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MC34166
Manufacturer Part Number
MC34166
Description
(MC33166 / MC34166) Step-Up/Down/Inverting Switching Regulators
Manufacturer
ON Semiconductor
Datasheet
1.MC34166.pdf
(18 pages)
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− 20
100
− 4.0
− 8.0
− 12
5.25
5.17
5.09
5.01
4.93
4.85
80
60
40
20
4.0
0
− 55
10
0
− 55
Figure 2. Voltage Feedback Input Threshold
V
Figure 4. Error Amp Open Loop Gain and
CC
Figure 6. Oscillator Frequency Change
− 25
100
− 25
= 12 V
Phase versus Frequency
T
A
Gain
1.0 k
T
0
versus Temperature
, AMBIENT TEMPERATURE (°C)
0
A
versus Temperature
, AMBIENT TEMPERATURE (°C)
f, FREQUENCY (Hz)
25
25
10 k
V
V
V
50
50
FB(th)
FB(th)
FB(th)
100 k
Max = 5.15 V
Typ = 5.05 V
Min = 4.95 V
V
V
R
T
A
CC
Comp
L
75
75
= +25°C
= 100 k
= 12 V
= 3.25 V
V
1.0 M
CC
MC34166, MC33166
Phase
100
100
= 12 V
http://onsemi.com
10 M
125
125
0
30
60
90
120
150
180
4
100
100
2.0
1.6
1.2
0.8
0.4
80
60
40
20
80
60
40
20
0
− 55
0
0
1.5
0
Figure 3. Voltage Feedback Input Bias
Figure 5. Error Amp Output Saturation
− 25
V
T
Figure 7. Switch Output Duty Cycle
A
CC
2.0
= +25°C
= 12 V
versus Compensation Voltage
0.4
Current versus Temperature
V
I
Comp
T
Sink
A
0
, AMBIENT TEMPERATURE (°C)
versus Sink Current
, OUTPUT SINK CURRENT (mA)
2.5
, COMPENSATION VOLTAGE (V)
0.8
25
3.0
50
1.2
3.5
V
V
T
A
V
V
75
CC
FB
CC
FB
= +25°C
= 5.5 V
= 12 V
= V
= 12 V
1.6
FB(th)
4.0
100
125
4.5
2.0