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0.8A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER
AZ34063C
Preliminary Datasheet
6
Apr. 2005 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
Figure 4. Output Switch On-Off Time vs.
Figure 5. Timing Capacitor Waveform
Typical Performance Characteristics
Oscillator Timing Capacitor
Time. 10 s/DIV
IC output
10
Forced
of output switch:
* The 100
resistor in the emitter of the driver device requires about 7.0 mA before the output switch conducts.
IC driver - 7.0mA*
Figure 6. Oscillator Frequency vs.Timing Capacitor
Figure 7. Standby Supply Current vs. Supply Voltage
0
5
10
15
20
25
30
35
40
0.5
1.0
1.5
2.0
2.5
3.0
3.5
CT=1.0nF
Pin 7=V
CC
Pin 2=GND
V
CC
. Supply Voltage (V)
Electrical Characteristics (Continued)
0.1
1
10
100
1
10
100
1000
t
off
t
on
V
CC
=5.0V
Pin 7=V
CC
Pin 5=GND
T
A
=25
OC
C
T
,Oscillator Timing Capacitor (nF)
Pin 1,5,8 = open
CT=1.0nF
TA=25
oC
VCC=5.0V
Pin 7=VCC
Pin 2=GND
0.1
1
10
100
1
10
100
V
CC
=5.0V
Pin 7=V
CC
Pin 5=GND
T
A
=25
OC
C
T
,Oscillator Timing Capacitor (nF)