MC34163 ON Semiconductor, MC34163 Datasheet - Page 7

• Manufacturer Part Number: MC34163
• Description: (MC33163 / MC33163) Step-Up/Down/Inverting Switching Regulators
• Manufacturer: ON Semiconductor

Timing Capacitor C
Comparator Output
Oscillator Output
Nominal Output
Shutdown
Output Voltage
Output Switch
Voltage Level
Timing Capacitor
Voltage Feedback 1
Voltage Feedback 2
V
1.25 V
0.55 V
CC
T
On
Off
I
pk Sense
LVI Output
1
0
1
0
R
R
C
GND
SC
DT
T
Figure 19. Representative Block Diagram
Figure 20. Typical Operating Waveforms
8
7
6
5
4
3
2
1
LVI
+
t
0.25 V
Oscillator
+
+
−
Thermal
+
MC34163, MC33163
Startup
+
45 k
+
−
+
1.125 V
1.25 V
http://onsemi.com
+
+
−
Current
(Bottom View)
Limit
9t
Feedback
Comparator
15 k
+
Latch
7
R
S
Q
+
7.0 V
2.0 mA
Q
60
1
Q
2
13
10
12
14
15
16
11
9
Bootstrap Input
GND
Driver Collector
Switch Collector
Switch Emitter
Quiescent Operation
+
−
=
Sink Only
Positive True Logic