IR3084AMPBF International Rectifier, IR3084AMPBF Datasheet - Page 36

• Manufacturer Part Number: IR3084AMPBF
• Description: IC XPHASE CONTROL 28-MLPQ
• Manufacturer: International Rectifier
• Series: XPhase™r

Specifications of IR3084AMPBF

• Applications: Processor
• Current - Supply: 14mA
• Voltage - Supply: 9.5 V ~ 16 V
• Operating Temperature: 0°C ~ 100°C
• Mounting Type: Surface Mount
• Package / Case: 28-MLPQ
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Soft Start Capacitor C
Calculate the soft start capacitor from the required soft start time using Equation (9) with Boot Mode;
The soft start delay time can be calculated using Equation (10) with Boot Mode;
The VID sample time can be found using Equation (11);
The power good delay time can be found using Equation (12);
Finally, use Equation (13) to calculate the over-current fault latch delay time;
TD1
Select RFB = 324 ohms and then calculate the droop resistor,
Choose the next standard value higher than this with 1% tolerance or RDRP = 787ohms.
Page 36 of 45
TD
TD
T
C
RDRP
OCDEL
SS
3
5
/
DEL




C
C
C


. 2
I

SS/DEL
CHG
SS
SS
C
RFB
31
VDAC
/
/
SS
DEL
DEL
ms
I
I
/
CHG
40
CHG
DEL
SS/DEL


*

VSETPT
D



*
. 0
0
1.3V
70
*

10
7 .

75
100



and Startup Times
V
VSETPT
*
1

V
6
10


mV


RFB

VDAC
6
0
TD

1 .
*
C

70
TD
*
RFB
4

. 0
10


*
RDRP
2
* 1

324
10

. 0
6
RFB
10


* 1
6
40

0

70
. 0
10
7 .
6
RFB
. 0



*

*
00494
*
10
015



100
RDRP
6
10
1
. 1
*

1 .
6
70
. 0

00

6
*
V
75
10

. 0
*
mS
*
10



. 0
00494
V





1
3
0195



6

. 0
70
73
*
324
* 1
250
. 1
*
us

* 1
10
10
324
us

787

10


787
6
6
. 0
*

1 .
998
3



ohms



1
3 .

ms
V
. 0

0988
1
1 .
V
uF
*
324
or
0.1uF
324
IR3084A
3/3/2009

787


