IR3084UMTRPBF International Rectifier, IR3084UMTRPBF Datasheet - Page 38

• Manufacturer Part Number: IR3084UMTRPBF
• Description: IC CTLR XPHASE 28-MLPQ
• Manufacturer: International Rectifier
• Series: XPhase™r

Specifications of IR3084UMTRPBF

• Package / Case: 28-MLPQ
• Mounting Type: Surface Mount
• Current - Supply: 14mA
• Voltage - Supply: 9.5 V ~ 16 V
• Operating Temperature: 0°C ~ 100°C
• Applications: Processor
• Package: 28-Lead MLPQ
• Circuit: X-Phase Control IC
• Switch Freq (khz): 150kHz to 1.0MHz
• Pbf: PbF Option Available
• 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 38 of 47
TD
TD
T
C
RDRP
OCDEL
SS
3
5
/
DEL
=
=
=
=
C
=
C
C
=
I
. 2
=
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
=
TD
70
*
RFB
4
+
. 0
10
=
=
*
RDRP
2
* 1
∗
324
10
−
. 0
6
RFB
10
∗
* 1
−
6
40
⋅
0
70
−
. 0
10
7 .
6
. 0
RFB
⎞
⎟
⎠
*
+
*
00494
*
10
015
=
−
=
100
RDRP
6
10
1
. 1
*
−
1 .
6
70
. 0
−
00
−
6
*
V
75
10
. 0
+
*
ms
*
10
⎞
⎟
⎠
. 0
00494
V
⎛
⎜
⎝
−
=
3
1
0195
−
−
−
6
=
. 0
70
73
*
324
250
* 1
. 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
IR3084U
+
787
9/14/2005
⎞
⎟
⎠