isl6530 Intersil Corporation, isl6530 Datasheet - Page 15

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isl6530

Manufacturer Part Number
isl6530
Description
Dual 5v Synchronous Buck Pulse-width Modulator Pwm Controller For Ddram Memory Vddq And Vtttermination
Manufacturer
Intersil Corporation
Datasheet

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ISL6530 DC-DC Converter Application Circuit
Figure 11 shows an application circuit for a DDR SDRAM
power supply, including V
Detailed information on the circuit, including a complete Bill-
Component Selection Notes:
C4,5,7,8,9,10,18,19 - Each 150mF, Panasonic EEF-UE0J151R
D1,2 - Each 30mA Schottky Diode, MA732
L1,2 - Each 1mH Inductor, Panasonic P/N ETQ-P6F1ROSFA
6.34kΩ
1.43kΩ
R
R
20
26
5600pF
C
C
15000pF
26
25
100Ω
100pF
3.01kΩ
R
25
C
R
100pF
27
C
19
30
DDQ
15
(+2.5V) and V
V2_SD
PGOOD
VREF
VREF_IN
GNDA
COMP1
FB1
SENSE1
COMP2
C
68pF
3.48kΩ
24
C
23
OCSET/SD
FIGURE 11. DDR SDRAM VOLTAGE REGULATOR
R
8.87kΩ
1
2700pF
TT
R
23
ISL6530
(+1.25V).
FB2
+5V
1000pF
C
1
R
3.01kΩ
21
C
22
VCC
ISL6530
158Ω
10000pF
R
UGATE1
PHASE1
UGATE2
PHASE2
SENSE2
LGATE1
LGATE2
22
BOOT1
PGND1
BOOT2
PGND2
PVCC1
C
0.1µF
of-Materials and circuit board description, can be found in
Application Note AN9993.
2
Q1,2 - Each Fairchild MOSFET; ITF86130DK8
Q3 - Fairchild MOSFET; ITF86110DK8
C
0.1µF
D
16
2
D
1
C
0.1µF
15
C
0.1µF
6
Q
1µH
3
L
2
Q
Q
2
1
C
1.0µF
1µH
L
17
1
1.0µF
C
3
C
150µF(x2)
4,5
150µF(x4)
C
150µF(x2)
C
7,8,9,10
18,19
November 15, 2004
V
@10A
V
@5A
DDQ
TT
FN9052.2

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