IP1206TRPBF International Rectifier, IP1206TRPBF Datasheet - Page 22

• Manufacturer Part Number: IP1206TRPBF
• Description: IC PWR BLOCK MULTIPHASE 30A LGA
• Manufacturer: International Rectifier
• Series: iPOWIR™r
• Type: Step-Down (Buck), PWM - Voltage Moder

Specifications of IP1206TRPBF

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 1 or 2
• Voltage - Output: 0.8 V ~ 5.5 V
• Current - Output: 30A, 15A
• Frequency - Switching: 200kHz ~ 600kHz
• Voltage - Input: 7.5 V ~ 14.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: *
• Package / Case: *
• Package: LGA - 15.5 x 9.25
• Circuit: Single Output or Dual Ch
• Iout (a): 30
• Switch Freq (khz): 200 - 600
• Input Range (v): 7.5 - 14.5
• Output Range (v): 0.8 - 5.5
• Ocp Otp Uvlo Pre-bias Soft Start And: Pre-Bias + SEQ + SYNC + Tracking
• Pbf: PbF Option Available
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

www.irf.com
Based on the frequency of the zero generated by
output capacitor and its ESR versus crossover
frequency, the compensation type can be
different.
compensation types and location of crossover
frequency.
The details of these compensation types are
discussed in application note AN-1043 which can
be downloaded from the IR Web-Site.
For this design we have:
V
V
V
V
g
L
C
F
These result to:
F
(Replace L to L/2 in formula#14 for current share configuration)
F
F
Select crossover frequency:
F
Since: F
selected to place the pole and zeros.
Table1- The compensation type and location
F
m
o
s
LC
ESR
s/2
o
in
o
osc
ref
o
Compensator
type
=1uH, DCR=2.4mOhm
=300kHz
o
=1.2V
=40kHz
=15x22uF, ESR= 0.33mOhm
=2800umoh
=12V
TypeIII(PID)
TypeIII(PID)
=0.8V
=10.73kHz
<
=150kHz
=1.25V
Method A
Method B
=1.46MHz
TypII(PI)
F
ESR
and
LC
<F
The
F
of F
o
o
<F
≤
ESR
(
s/2
F
F
F
1/5
table
LC
LC
LC
<F
F
<F
<F
<F
versus F
~
ESR
ESR
1/10
ESR
o
o
<F
<F
, typeIII method B is
vs. F
<F
)
below
ESR
s/2
*
F
<F
o
o
s
<F
<F
o
ESR
s/2
s/2
shows
Output
capacitor
Electrolytic
, Tantalum
Tantalum,
Ceramic
ceramic
the
2/26/2008
The following design rules will give a crossover
frequency
switching frequency. The higher the band width,
the potentially faster the load transient response.
The DC gain will be large enough to provide high
DC-regulation accuracy (typically -5dB to -12dB).
The phase margin should be greater than 45
overall stability.
Desired Phase Margin:
Calculate
C
C
Select
Select
R
C
Calculate
F
F
F
F
R
R
R
Z
Z
P
P
11
12
10
8
7
6
5
2
2
2
2
=
=
=
≥
=
=
=
=
=
=
=
V
2
2
g
10
81
2
2
F
F
2
:
2
π
π
o
m
π
π
π
:
V
o
o
F
−
.
2 .
C
*
*
*
72
*
ref
approximately
*
Z1
*
*
;
V
C
C
10
kHz
R
R
F
C
F
F
1
1
ref
kHz
10
1
10
=
1
1
1
1
1
o
7
Z1
8
P
11
=
R
3
,
−
+
+
−
*
*
*
0
*
≥
1
C ,
*
R
*
7
5 .
L
F
F
Sin
Sin
Sin
Sin
nF
R
. 0
*
R
R
6
o
P
Z
12
6
*
V
2
2
72
7
*
7
and
;
Θ
Θ
Θ
Θ
F
in
;
R
;
C
−
and
;
Z
K
C
R
C
o
5
2
R
Ω
12
8
11
*
R
8
=
;
V
;
=
and
C
=
5
=
R
39
osc
Θ
. 1
10
155
:
Select
iP1206PbF
6
4
2 .
96
max
;
.
:
=
36
C
K
K
one-sixth
pF
13
F
10
Ω
nF,
=
P3
Ω
9 .
,
,
=
,
π
:
3
=
K
Select
R
. 0
Select
Select
Ω
0.5
Select
7
85
,
=
nF
*
Select
. 6
F
81
,
:
s
:
:
:
R
C
K
R
of
C
5
12
Ω
8
11
=
:
=
=
R
39
o
=
100
2
6
the
for
5.6nF
K
2 .
=
Ω
K
pF
16
Ω
22
9 .
K
Ω