MC34167 ON Semiconductor, MC34167 Datasheet - Page 4

• Manufacturer Part Number: MC34167
• Description: (MC33167 / MC34167) Step-Up/Down/Inverting Switching Regulators
• Manufacturer: ON Semiconductor

− 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
1.0 k
T
0
, AMBIENT TEMPERATURE (°C)
versus Temperature
0
versus Temperature
A
Gain
, AMBIENT TEMPERATURE (°C)
f, FREQUENCY (Hz)
25
25
10 k
V
V
V
FB(th)
FB(th)
FB(th)
50
50
Max = 5.15 V
Min = 4.95 V
Typ = 5.05 V
100 k
V
V
R
T
A
75
CC
Comp
75
L
= +25°C
= 100 k
= 12 V
V
= 3.25 V
1.0 M
CC
Phase
MC34167, MC33167
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 5. Error Amp Output Saturation
Figure 3. Voltage Feedback Input Bias
− 25
V
T
Figure 7. Switch Output Duty Cycle
A
CC
2.0
= +25°C
= 12 V
0.4
versus Compensation Voltage
Current versus Temperature
V
I
Sink
Comp
T
A
versus Sink Current
0
, AMBIENT TEMPERATURE (°C)
, OUTPUT SINK CURRENT (mA)
2.5
, COMPENSATION VOLTAGE (V)
0.8
25
3.0
50
1.2
3.5
75
V
V
T
V
V
A
CC
FB
CC
FB
= +25°C
1.6
= 5.5 V
= V
= 12 V
= 12 V
4.0
100
FB(th)
125
2.0
4.5