XC9519 TOREX [Torex Semiconductor], XC9519 Datasheet - Page 13

• Manufacturer Part Number: XC9519
• Description: Dual Output Step-Up/Inverting DC/DC Converter
• Manufacturer: TOREX [Torex Semiconductor]

■EXTERNAL COMPONENTS
<Step-up DC/DC Converter Output Voltage Setting>
The output voltage V
Adjust R
Set the output voltage so that V
series as R
Examples of setting C
【 Typical Examples 】
<Inverting DC/DC Converter Output Voltage Setting>
The output voltage V
Adjust R
Set the output voltage so that
【 Typical Examples 】
The output voltage V
Adjust the value of the phase compensation speed-up capacitor C
The output voltage V
-12.0V
-15.0V
V
12.0V
15.0V
18.0V
V
-4.0V
-5.0V
-9.0V
4.0V
5.0V
9.0V
V
V
V
(V
OUTP
OUTN
OUTP
OUTN
IN
FN
- V
FBP1
FBN1
: Forward voltage of external diode SBD
= V
= - (V
OUTN
SP
and R
and R
. If a high output voltage is set, inserting a phase compensation speed-up capacitor may cause unstable operation.
FBP
+ V
300k Ω
300k Ω
240k Ω
330k Ω
336k Ω
408k Ω
300k Ω
300k Ω
270k Ω
360k Ω
360k Ω
R
R
REF
× (R
FBN1
FBP1
FN
FBP2
FBN2
- V
≦
OUTP
OUTN
FBP1
FBP
OUTP
20.0V
FBN
so that (R
so that (R
OUTN
is determined by the values of R
and R
) × R
is determined by the values of R
+ R
of a step-up DC/DC converter can be set by connecting external dividing resistors R
100k Ω
of an inverting DC/DC converter can be set by connecting external dividing resistors R
75k Ω
30k Ω
30k Ω
24k Ω
24k Ω
75k Ω
60k Ω
30k Ω
30k Ω
24k Ω
R
R
FBP2
FBN1
FBP2
FBN2
SP
OUTP
FBP1
FBN1
) / R
are shown in the next section, “Step-up DC/DC Converter Error Amplifier External Compensation”.
/ R
≧V
+ R
+ R
FBP2
FBN2
IN
FBP2
FBN2
+ 0.2V is satisfied.
) < 500kΩ.
) < 500k
N
) is satisfied.
Ω
.
FBP1
FBN1
and R
and R
FBP2
FBN2
FBP
as given in the equation below.
so that f
as given in the equation below.
zfp
=1 / (2 ×
π
× R
FBP1
) is about 40kHz, and insert several kΩ in
FBP1
FBN1
and R
and R
FBP2
FBN2
.
.
XC9519
13/38
Series