ISL6532CCRZ-T Intersil, ISL6532CCRZ-T Datasheet - Page 15

• Manufacturer Part Number: ISL6532CCRZ-T
• Description: IC REG/CTRLR ACPI DUAL DDR 28QFN
• Manufacturer: Intersil

Specifications of ISL6532CCRZ-T

• Applications: Memory, DDR/DDR2 Regulator
• Current - Supply: 5.25mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 28-QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Supply: -

MOSFET Selection - AGP LDO
The main criteria for selection of the linear regulator pass
transistor is package selection for efficient removal of heat.
Select a package and heatsink that maintains the junction
temperature below the rating with a maximum expected
ambient temperature.
The power dissipated in the linear regulator is:
where I
nominal output voltage of the linear regulator.
P
C
1µF
LINEAR
1.25V
24
V
V
1.5V
TT
AGP
V
O
REF
≅
is the maximum output current and V
PGOOD
V
+
I
O
DDQ
220µF
V
Q
C
DDQ
×
4
20
220µF
C
(
C
0.1µF
23
V
V
+
26
DDQ
IN
–
+
V
OUT
C
220µF
21
249Ω
R
R
C
0.1µF
10
10.0kΩ
8
FIGURE 8. DDR SDRAM AND AGP VOLTAGE REGULATOR USING THE ISL6532C
27
)
C
SLP_S5
SLP_S3
R
25
0.47µF
15
2
680pF
C
100kΩ
+3.3V
19
287Ω
R
9
PGOOD
S5#
S3#
VREF_OUT
VREF_IN
VTT
VTT
VTTSNS
DRIVE2
FB2
C
1µF
17,18
OUT
is the
5VSBY
ISL6532C
ISL6532C
VCC12
OCSET
UGATE
PHASE
LGATE
GNDQ
GNDQ
COMP
VDDQ
VDDQ
VDDQ
NCH
ISL6532C Application Circuit
Figure 8 shows an application circuit utilizing the ISL6532C.
Detailed information on the circuit, including a complete Bill-
of-Materials and circuit board description, can be found in
Application Note AN1056.
FB
C
1µF
16
4.99kΩ
C
R
R
7
22
1
6.8nF
C
8.87kΩ
14
1000pF
1000pF
C
15
19.1kΩ
R
3
VCC5
Q
Q
Q
L
2.1µH
5
1,3
2,4
56nF
825Ω
1
C
R
13
6
2.1µH
1.74kΩ
L
R
2
4
22.6Ω
C
1µF
R
4,5
5
+
+
2200µF
C
2.5V 15A
1-3
1800µF
C
V
6-8
DDQ
MAX
C
22µF
9-12