IR3502BMTRPBF International Rectifier, IR3502BMTRPBF Datasheet - Page 32

• Manufacturer Part Number: IR3502BMTRPBF
• Description: IC REG XPH INTEL VR11.1 32-MLPQ
• Manufacturer: International Rectifier
• Series: XPhase3™r

Specifications of IR3502BMTRPBF

• Package / Case: 32-MLPQ
• Mounting Type: Surface Mount
• Current - Supply: 8mA
• Voltage - Supply: 8 V ~ 16 V
• Operating Temperature: 0°C ~ 100°C
• Applications: Processor
• Operating Temperature (max): 150C
• Operating Temperature (min): 0C
• Pin Count: 32
• Mounting: Surface Mount
• Package Type: MLPQ
• Case Length: 5mm
• Screening Level: Commercial
• Package: 32-Lead MLPQ
• Circuit: X-Phase Control IC
• Switch Freq (khz): 250kHz to 1.5MHz
• Pbf: PbF Option Available
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Droop Resistor
Based on the above calculation R
Pre-select R
find out R
Over Current Threshold
The OCP is fixed at 1.17 V above the VDAC voltage. Therefore, it can be determined as follows
VCCL Drive Resistor R
example, it’s assumed that IR6622 and IRF6628 are used as the control and sync FET respectively.
The minimum input voltage is assumed to be 10.5 V and VCCL is fixed at 6.5V for this design.
Choose a transistor with β(min) of 50. The maximum input voltage is assumed 13.5 V,
Thermistor R
Choose NTC thermistor R
resistance at the allowed maximum temperature T
Select R
range. Then calculate R
R
R
The maximum drive current for the linear regulator is dependent on the type of MosFET used. For this
TMAX
HOTSET

1
HOTSET2
R
Page 32 of 38

DRP
HOTSET
(
R
FB
.
TMAX
HOTSET3
=1 kΩ and using R
3
*
= 931Ω to linearize the NTC, which has non-linear characteristics in the operational temperature

EXP
R
HOTSET
and Over Temperature Setting Resistors R
[
HOTSET1
B
VCCLDRV
I
1
HOTSET
drive
I
6 .
2
HOTSET3
OCP
)
_
( *
R
avg

3
VCCL
DRP
( *



corresponding to the allowed maximum temperature TMAX.
o
DRP
1
3

=0.8 mΩ, G
T


=2.2kΩ, which has a constant of B




L
(
R
can be selected to obtain specific output impedance.
30
. 0
_
1
3
VCCLDRV
1

MAX
35

. 1
3 .
0
) 6
m
n
5
1
8 .


13
k

33
m


T

11
5 .
cs

_
5 .
(
10
V
142
=33.5 along with the converter parameters can be plugged into (24) to
ROOM
n
1
700


 


)
5 .



MAX
0




V
195


7 .
33
1
700
)]


931

5 .
. 1

0
mA
. 8 (
is,
6
1
k
7 .
5 .

17
2
* )
6 .
5
457
V

. 0
2 .
/

30
10
7 (
35

*
9
k
mA
6
10

m
)
mA
5 .
II
. 1
V
3

 


. 8 (
1
*

) 6
10
k


EXP



837
5
1
mA
700

HOTSET1


. 3
k
195
[
. 5

63
3520

HOTSET3
618
1
10
k
k
mA

k
k
)
( *
and R
, choose R










273

=3520, and the NTC thermistor
7
182
5 .
HOTSET2
1

k
115

A
HOTSET1

273
IR3502B
1

=3.65kΩ.
25
)]
V3.2

142
