MC34060A Datasheet, PDF (11/16 Pages) ON Semiconductor – Fixed Frequency, PWM, Voltage Mode Single Ended Controllers

V_in = 8.0V to 26V
4.7k
+
50/35V
MC34060A, MC33060A
22k
0.05
33k
2.7M
3.9k
10
1
V_CC
+
2
-
3
Comp
14
+
MC34060A
9
C
13
-
12
V_ref
D_T C_T
45
4.7k
0.001
390
8
E
7
GND
R_T
6
47k
150mH @ 4.0A
MR850
20mH @ 1.0A
* ^Vout
28V/
0.5A
300
0.1
470
Tip 111
+
470/
35V
+*
470/
35V
Test
Conditions
Line Regulation
V_in = 8.0 V to 26 V, I_O = 0.5 A
Load Regulation
V_in = 12 V, I_O = 1.0 mA to 0.5 A
Output Ripple
V_in = 12 V, I_O = 0.5 A
Efficiency
V_in = 12 V, I_O = 0.5 A
*Optional circuit to minimize output ripple
Results
40 mV 0.14%
5.0 mV 0.18%
24 mV p−p P.A.R.D.
75%
Figure 20. Step−Up Converter
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