IR3523MTRPBF International Rectifier, IR3523MTRPBF Datasheet - Page 31

• Manufacturer Part Number: IR3523MTRPBF
• Description: IC XPHASE3 CTLR VR11.1 40-MLPQ
• Manufacturer: International Rectifier
• Series: XPhase3™r

Specifications of IR3523MTRPBF

• Applications: Processor
• Current - Supply: 10mA
• Voltage - Supply: 4.75 V ~ 7.5 V
• Operating Temperature: 0°C ~ 100°C
• Mounting Type: Surface Mount
• Package / Case: 40-MLPQ
• Ic Function: Dual Output Control IC
• Supply Voltage Range: 4.75V To 7.5V
• Operating Temperature Range: 0°C To +150°C
• Digital Ic Case Style: MLPQ
• No. Of Pins: 40
• Controller Type: XPhase
• Rohs Compliant: Yes
• Package: 40-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

Soft Start Capacitor C
Determine the soft start capacitor from the required soft start time.
The soft start delay time is
The power good delay time is
The maximum over current fault latch delay time is
VDAC Slew Rate Programming Capacitor C
Over Current Setting Resistor R
The output1 over current limit is 42A and the output2 over current limit is 125A. The OCSET bias current
calculates out to be 38uA with R
amplifier input offset voltage is typically 0mV. K
phase, is calculated with the following equations:
C
C
TD
TD
TD
t
K
K
OCDEL
C
R
SS
SS
P
P
VDAC
VDAC
1
3
( 3
1
2
/
/
) 1 (
DEL
DEL
=
=
) 2
=
=
C
(
Page 31 of 37
1
=
=
=
2
(
V
=
12
SS
2
=
=
0
I
C
SR
5 .
C
/
5 .
I
I
−
TD
−
DEL
SS
TD
CHG
SS
*
Source
V
DOWN
. 1
+
/
Vboot
/
C
DEL
O
VID
2
DEL
) 5
1 *
2
3
)
SS
*
2 .
*
C
1
∗
∗
4 .
I
2
/
I
I
( *
V
DEL
=
VDAC
DISCHG
∗
1
2
CHG
( *
I
CHG
O
5 .
10
=
LIMIT
113
. 3
. 3
. 3
I
SS/DEL
/(
*
/(
0
93
25
2
CHG
I
−
92
=
L
. 0
1 .
15
90
=
CHG
∗
50
/
∗
12
*
−
2
*
10
2
=
n
−
*
V
10
10
*
V
*
41
*
10
VID
3
I
10
−
boot
=
10
10
6
3
3 .
−
∗
6 .
6
−
2
−
=
Ω
9
OCSET
−
OSC
−
f
3
1 *
5 .
−
2
3
6
SW
∗
1
34
*
1
*
. 1
−
*
12
1 .
4 .
5 .
50
50
. 1
) 4
∗
7 .
0
= 15.8 k
∗
=
1 .
) 4
) 2
*
nF
*
=
750
10
*
2
47
10
=
=
8 .
10
0
, Choose C
−
−
1 .
*
mS
6
0
(
*
VDAC
6
12
−
10
1 .
*
6
10
=
P,
=
10
*
*
−
−
0
(see Electrical Characteristics Table). The total current sense
the ratio of inductor peak current over average current in each
3
0
. 0
6
10
1 .
. 1
−
and Resistor R
∗
1 .
6
12
uF
22
uF
−
) 2
50
( *
6
VDAC
50
)
( *
=
=
. 3
*
∗
10
. 0
. 3
93
*
. 1
. 0
10
638
92
22
23
= 33nF
−
−
6
−
1
−
/(
.
6
mS
1 .
150
1
5 .
−
VDAC
42
. 1
−
*
) 4
. 1
10
1 /
) 4
−
=
9
=
2
∗
9 .
12
2
mS
0 .
∗
mS
750
*
10
June 20, 2008
3
∗
) 2
=
IR3523
. 0
156