Diodes AZ34063U - Manual (Page 6)

1.5A STEP-DOWN/STEP-UP/INVERTING DC-DC CONVERTER AZ34063U
6
Jan. 2013 Rev. 1. 3 BCD Semiconductor Manufacturing Limited
Data Sheet
Figure 4. Output Switch On-Off Time vs. Figure 5. Timing Capacitor Waveform
Typical Performance Characteristics
Oscillator Timing Capacitor
I
C
output
≥ 10 Forced β of output switch:
* The 100 Ω resistor in the emitter of the driver device requires about 7.0 mA before the output switch conducts.
I
C
driver - 7.0mA*
Time 20 μs/DIV
Pin 1,5,8=open
C
T
=1.0nF
T
A
=25 o C
V
CC
=5.0V
V
PIN7
=V
CC
V
PIN2
=GND
Figure 6. Oscillator Frequency vs.Timing Capacitor Figure 7. Standard Supply Current vs. Supply Voltage
Electrical Characteristics (Continued)
0 5 10 15 20 25 30 35 40
0.5
1.0
1.5
2.0
2.5
3.0
3.5
C
T
=1.0nF
V
PIN7
=V
CC
V
PIN2
=GND
I CC
Supply Curr
e
nt
(
m
A)
V
CC
Supply Voltage (V)
0.1 1 10 100
1
10
100
1000
t
off
t
on
V
CC
=5.0V
V
PIN7
=V
CC
V
PIN5
=GND
T
A
=25 O C
T
o
n-of
f O
u
tput Switch O
n
-O
ff
T
im
e
(
μ
s)
C
T
Oscillator Timing Capacitor (nF)
( V
CC
=5.0V, T
A
=25
o
C, unless otherwise specified.)
0.1 1 10 100
1
10
100
O
scil
lator F
requ
ency (kHz
)
C
T
Timing Capacitor (nF)
V
CC
=5.0V
V
PIN7
=V
CC
V
PIN5
=GND
T
A
=25 O C
V
OSC
O
scil
lat
or V
olta
ge (V)
2
00
m
V
/DI
V