MC34063E ST Microelectronics, MC34063E Datasheet - Page 4

• Manufacturer Part Number: MC34063E
• Description: DC/DC Converter Contolr Circuits
• Manufacturer: ST Microelectronics

MC34063A/E
TOTAL DEVICE
NOTES:
1) Maximum package power dissipation limit must be observed.
2) T
3) If Darlington configuration is not used, care must be taken to avoid deep saturation of output switch. The resulting switch-off time may be
adversely affected. In a Darlington configuration the following output driver condition is suggested:
Forced
* Current less due to a built in 1K anti leakage resistor.
4) Start-up Voltage is the minimum Power Supply Voltage at which the internal oscillator begins to work.
TYPICAL PERFORMANCE CHARACTERISTICS
Figure 1 : Emitter Follower Configuration Output
Saturation Voltage vs Emitter Current
Figure 2 : Output Switch ON-OFF Time vs
Oscillator Timing Capacitor
4/16
V
Symbol
START-UP
LOW
I
CC
= 0°C, T
of output current switch = I
Supply Current
Start-Up Voltage (Note 4)
HIGH
= 70°C (AC and EC series); T
Parameter
COUTPUT
/(I
CDRIVER
V
C
PIN 7 = V
V
PIN 2 = GND
Remaining pins open
T
C
LOW
A
CC
PIN5
T
T
= 25°C
= 1 nF
= 1 µF, PIN 5 = 0
- 1mA*)
= -40°C, T
= 5 to 40 V
>V
TH
CC
Test Conditions
10
HIGH
= 85°C (AB series); T
Figure 3 : Common Emitter Configuration Output
Switch Saturation Voltage vs Collector Current
Figure 4 : Darlington Configuration Collector
Emitter Saturation Voltage (V
for MC34063A
for MC34063E
for MC34063A
for MC34063E
LOW
= -40°C, T
Min.
HIGH
Typ.
2.5
1.5
2.1
1.5
CEsat)
= 125°C (EB series).
vs Temperat.
Max.
4
4
Unit
mA
V