AP34063N8L-U Diodes Zetex, AP34063N8L-U Datasheet - Page 8

• Manufacturer Part Number: AP34063N8L-U
• Description: DC DC Cntrlr Single-OUT Boost/Buck Controller 3V to 40V Input 8-Pin PDIP Tube
• Manufacturer: Diodes Zetex
• Type: Boost/Buck Controllerr

Specifications of AP34063N8L-U

• Package: 8PDIP
• Input Voltage: 3 to 40 V
• Output Voltage: 1.25 to 40 V
• Output Current: 1.6(Max) A
• Number Of Outputs: 1

Design Formula Table
V
V
The following power supply characteristics must be chosen:
V
V
I
f
V
AP34063 Rev. 5
DS31004
out
min
sat
F
in
out
ripple(pp)
= Forward voltage drop of the output rectifier.
- Nominal input voltage.
- Desired output current.
- Minimum desired output switching frequency at the selected values of V
= Saturation voltage of the output switch.
- Desired output voltage, |V
Calculation
I
( t
pk
- Desired peak-to-peak output ripple voltage. In practice, the calculated capacitor value will need to be increased due to its
t
equivalent series resistance and board layout. The ripple voltage should be kept to a low value since it will directly affect the
line and load regulation.
on
(switch)
L
on
R
C
C
t
t
(min)
+ t
off
on
/ t
sc
T
O
off
off
)
out
| = 1.25 (1+R2/R1)
2I
( V
9
V
out (max)
in (min)
( t
out
0.3 / I
I
4.0×10 -5 t
pk (switch)
V
t
t
V
on
Step-Up
on
off
+ V
in (min)
I
t
ripple (pp)
on
out
+t
– V
1/f
(t
+ t
F
off
pk (switch)
t
on
on
-V
- V
) - t
sat
off
/ t
+1
in (min)
on
off
)
sat
off
+1)
www.diodes.com
t
on (max)
8 of 11
( V
I
in (min)
pk (switch)
v
in(min)
( t
0.3 / I
I
Step-Down
4.0×10 -5 t
pk (switch)
t
t
8V
in
on
off
on
– V
v
2I
and I
t
on
out
ripple (pp)
+t
- v
out (max)
( t
1/f
UNIVERSAL DC/DC CONVERTER
sat
+ t
off
pk (switch)
+ v
off
o
sat
.
) - t
-V
off
+ t
F
+1
- v
on
out
off
on
out
)
)
t
on (max)
9
( V
2I
Voltage-Inverting
out (max)
in (min)
( t
V
I
0.3 / I
AP34063
pk (switch)
4.0×10 -5 t
t
t
I
ripple (pp)
on
Iv
on
off
out
©
t
V
out
on
+ t
Diodes Incorporated
t
– V
on
in
(t
1/f
+ t
l + v
pk (switch)
off
on
JULY 2009
- v
sat
off
) - t
/ t
+1
sat
F
)
on
off
off
+1)
t
on (max)