參數(shù)資料
型號: MC34063AP
廠商: FAIRCHILD SEMICONDUCTOR CORP
元件分類: 穩(wěn)壓器
英文描述: Processor Supervisory Circuits with Power-Fail 8-SOIC -40 to 85
中文描述: 1.5 A SWITCHING REGULATOR, 100 kHz SWITCHING FREQ-MAX, PDIP8
封裝: DIP-8
文件頁數(shù): 9/15頁
文件大小: 1483K
代理商: MC34063AP
Calculation
Parameter
Step-Up
(Discontinuos mode)
V
out
+
V
F
V
in
(
min
)
V
in
(
min
)
V
sat
Step-Down
(Continuos mode)
V
out
+
V
F
V
in
(
min
)
V
sat
V
out
Voltage Inverting
(Discontinuos mode)
|
V
out
|
+
V
F
V
in
V
sat
t
on
/t
off
(t
on
+ t
off
)max
C
T
I
PK(switch)
R
SC
C
O
1/f
min
1/f
min
1/f
min
4.5x10
-5
t
on
2I
out(max)
[(t
on
/t
off
)+1]
0.3/I
PK(switch)
I
out
t
on
V
ripple
(
p
p
)
V
in
(
min
)
V
sat
I
PK
(
switch
)
4.5x10
-5
t
on
2I
out(max)
0.3/I
PK(switch)
I
PK
(
switch
)
(
t
on
+
t
off
)
8V
ripple
(
p
p
)
V
in
(
min
)
V
sat
V
out
I
PK
(
switch
)
4.5x10
-5
t
on
2I
out(max)
[(t
on
/t
off
)+1]
0.3/I
PK(switch)
I
out
t
on
V
ripple
(
p
p
)
V
in
(
min
)
V
sat
I
PK
(
switch
)
L(min)
t
on
(
max
)
t
on
(
max
)
t
on
(
max
)
NOTES:
V
sat
= Saturation voltage of the output switch
V
F
= Foward voltage drop of the output rectifier
THE FOLLOWING POWER SUPPLY CHARACTERISTICS MUST BE CHOSEN:
V
in
= Nominal input voltage
V
out
= Desired output voltage, |V
out
| = 1.25(1+R
2
/R
1
)
I
out
= Desired output current
f
min
= Minimum desired output switching frequency at the selected values of Vin and Io
V
ripple
= Desired peak to peak output ripple voltage. In practice, the calculaed capacitor value will and to be increased due to its 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.
Step-up With External NPN Switch
MC34063A/E
9/15
相關PDF資料
PDF描述
MC34063AD Processor Supervisory Circuits with Power-Fail 8-SOIC -40 to 85
MC34063A Processor Supervisory Circuits with Power-Fail 8-SOIC -40 to 85
MC34063 Processor Supervisory Circuits with Power-Fail 8-MSOP-PowerPAD -40 to 85
MC34063A Processor Supervisory Circuits with Power-Fail 8-MSOP-PowerPAD -40 to 85
MC34063ACN Processor Supervisory Circuits with Power-Fail 8-MSOP-PowerPAD -40 to 85
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