IR3504MTRPBF International Rectifier, IR3504MTRPBF Datasheet - Page 29

• Manufacturer Part Number: IR3504MTRPBF
• Description: IC CTRL XPHASE3 SVID 32-MLPQ
• Manufacturer: International Rectifier
• Series: XPhase3™r

Specifications of IR3504MTRPBF

• 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: *
• 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

VDAC Slew Rate Programming Capacitor C
The slew rate of VDAC down-slope SR
(5), where I
down-slope. The resistor R
Over Current Setting Resistor R
The total input offset voltage (V
(V
sense resistor R
The inductor DC resistance is utilized to sense the inductor current. R
The over current limit is set by the external resistor R
limit. I
CHARACTERISTICS Table. G
over average current in each phase and can be calculated from (10).
VCCL Programming Resistor R
Since VCCL voltage is proportional to the MOSFET gate driver loss and inversely proportional to the
MOSFET conduction loss, the optimum voltage should be chosen to maximize the converter efficiency. VCCL
linear regulator consists of an external NPN transistor, a ceramic capacitor and a programmable resistor
divider. Pre-select R
CS_OFST)
OCSET
Page 29
SINK
of the amplifier itself and that created by the amplifier input bias current flowing through the current
is the bias current of OCSET pin and can be calculated with the equation in the ELECTRICAL
CS
is the sink current of VDAC pin. The slew rate of VDAC up-slope is three times greater that of
.
VCCLFB1
V
R
K
R
CS
VCCLFB
OCSET
P
VDAC
_
=
, and calculate R
TOFST
(
CS
V
=
2
I
is used to compensate VDAC circuit and is determined by (6).
VCCLFB1
CS_TOFST
−
=
[
is the gain of the current sense amplifier. K
OCSET
R
C
I
=
V
VDAC
R
LIMIT
VDAC
O
VCCL
V
VCCLFB
n
)
CS
∗
DOWN
V
_
=
∗
O
=
OFST
I
0
and R
R
−
1
O
/(
) of current sense amplifier in phase ICs is the sum of input offset
SR
5 .
L
*
. 1
L
/
I
. 1
∗
VCCLFB2
+
23
n
SINK
DOWN
+
∗
VDAC
can be programmed by the external capacitor C
23
1 (
V
3
I
VCCLFB2
2 .
I
C
CSIN
+
∗
VDAC
∗
K
f
10
and Resistor R
+
P
SW
)
∗
from (11).
−
2
+
OCSET
15
∗
R
V
) 2
CS
CS
_
TOFST
as defined in (9). I
]
∗
VDAC
G
L
CS
is the inductor DCR.
/
I
OCSET
P
is the ratio of inductor peak current
LIMIT
(9)
is the required over current
(5)
(6)
(7)
(10)
(11)
July 28, 2009
VDAC
IR3504
as defined in